one-jointed, outer terminated in a flattened spine. Telson divided almost to the base, but the two portions are in contact with each other to the apex, margins smooth. Fourth abdominal segment has a deep sinus on the anterior portion of the dorsal margin, and behind this a large hump-like elevation. Animal pure white. Dredged parasitic on Echinus esculentus, L., in Sleat Sound. Microprotopus, Norman, nov. gen. Antennæ with secondary appendage. First gnathopods subchelate. Second gnathopods larger than first, subchelate, greatly developed in ♂, much smaller in . Uropods terminating in simple spines, those of last pair with a single Telson tubular. ramus. Microprotopus maculatus, Norman, n. sp. Male.-Eye small, round, crimson, situated on a lobe between the bases of the two pairs of antennæ. Antennæ subequal, superior having peduncle reaching a little beyond the penultimate joint of the peduncle of the inferior antennæ; basal joint stouter than, but equal in length to, the second; third joint shorter and more slender than the preceding; appendage minute, two-jointed, not so long as first joint of filament, which consists of nine or ten articulations, and is of about equal length with the peduncle. Inferior antennæ stronger than the superior, and, as well as the superior, furnished with scattered hairs, but no spines. Mandible with a three-jointed palp. First gnathopods having the hand of equal length to the wrist, but broader, widening from the base to the extremity, palm oblique, concave; nail well developed, simple, extending rather beyond the palm. Second gnathopods having the wrist very short, hand greatly developed, as long as, or even longer than the whole of the rest of the leg, oblong, palm whole length of hand, slightly concave, with a tooth-like process (wanting in the young) at the base, and two large teeth on the distal third; finger large, strong, curved, fully as long as the hand; the inner margin under a high power of the microscope is seen to be finely crenated, or, rather, rasped like a file. Uropods furnished with a few simple spines; the penultimate pair extending beyond the last, which have only one branch; this branch is rather longer than the peduncle, and is furnished with two or three spines on the inner margin, and terminates in two spines and a cilium. Telson tubular; apex truncate, slightly emarginate, and having one or two hairs at the angles. In the female the first gnathopods are of nearly the same form as those of the male, but the hand is rather narrower: the second gnathopods are wholly different; the wrist and two preceding joints are very short, the former, however, is the more developed, and assumes a caliculate form at its termination from its having a projecting seta-tipped lobe both in front and behind; hand subquadrate, narrower than the wrist, with a row of long scattered setæ down the centre; palm slightly oblique, concave, with a few fine fringing setæ, and a single spine at the angle; nail as long as the palm, strong. Colour yellowish, more or less covered with umber-brown spots; these spots are seen under the microscope to be dendritic; they often form bands across the segments, or at times so coalesce as to make the whole animal appear of a brown colour. Length two lines. Found at Tobermory in Mull, among Laminaria. Class POLYZOa. Scrupocellaria inermis, Norman, n. sp. Cells regularly ovate, wholly unspined, and not furnished with any operculum or suboral avicularia; mandible of lateral avicularia very short and blunt; ovicell globular, smooth, inclining inwards; vibracular capsules of moderate size, erect, bilobed; vibracula long, arising from between the lobes of the capsules. Height half an inch. Dredged in deep water in the Minch, also at Shetland. Differs from S. scruposa in having the cells larger, not furnished with spines, and in the vibracular capsules, which are proportionately large, and the mandible of the avicularia being shorter and blunter. Eschara quincuncialis, Norman, n. sp. Polyzoary white, smooth, polished, cylindrical. Cells distant, in linear series, regularly arranged in quincunx, swollen, mammiform. Apertures keyholeshaped, rounded above, with a small sinus below, immediately beneath which a small inconspicuous avicularium is sometimes present. Ovicell small, with 1-4 round perforations. The specimen described is apparently a fragment, and is not more than a quarter of an inch long. It is, however, manifestly distinct from all the Eschare with which we were previously acquainted. Dredged in deep water in the Minch. Lepralia collaris, Norman, n. sp. Cells small, crowded, linearly arranged, not in quincunx, granular, not punctured round the margin; mouth arch-formed, rounded above, truncate below; peristome greatly elevated into a frill-like plate which surrounds the sides and lower margin of the mouth, within which there is no denticle; ovicell globular, of moderate size, punctate. In small patches on old shells and stones from the Minch, coast of Antrim, Guernsey, and Shetland. It will be evident from the foregoing list of localities that this species is widely distributed on our coasts. It has been hitherto mistaken (by Mr. Busk, Mr. Alder, and myself) for L. eximia, Hincks, in common with which species it has the peculiar collar-formed peristome; but having recently had an opportunity of examining Mr. Hincks's typical and only known specimen of L. eximia, I found it to be a wholly different form from that which is now described. Lepralia crystallina, Norman, n. sp. Cells short, obovate, of moderate size, and moderately tumid, not regularly arranged, nor separated from each other by raised lines, nor areolated at the margin; white, crystalline, punctate, punctures round, few, equally distributed on all parts of the cell; mouth triangular, lateral walls much raised, margined above with five spines (rarely present), a small avicularium at the lower angle of the mouth, with short rounded mandible directed downwards; a bifid tooth-like process within the mouth; ovicell globular, crystalline, punctate. On shell and stone in very small patches. The Minch and Shetland in deep water. Nearly allied to L. Landsborovii, as compared with which the cells are smaller, shorter, more convex, less regularly disposed, not separated from each other by distinct raised lines, more regularly punctate than is usual in L. Landsborovii, in which the punctures are often absent from the centre of the cell; the mouth also is more angular. Alecto compacta, Norman, n. sp. Polyzoary narrow at the base, thence rapidly widening and irregularly ramifying, branches wide and short, their terminations rounded; remarkably flat, and closely appressed to the shell. Cells very small, irregularly scattered and separated from each other, shortly tubular, scarcely raised above the level of the polyzoary, all inclining towards distal extremity of branches, though bending slightly towards the side of the polyzoary to which they are nearest. Colour white. On stone and shell. The Minch and Shetland in deep water. A. compacta approaches more nearly to A. dilatans than to the other described species, but is much smaller and more delicate in all its parts, and depressed flat to the surface instead of being raised in a swollen cushion-like manner. A. dilatans is usually tinged with violet, while A. compacta is always white, and approaches in many respects to a Diastopora. Class HYDROZOA. Halecium geniculatum, Norman, n. sp. Hydrosoma slender, branching, the branches (in type specimen) all in the same plane; branchlets flexuous, bending alternately right and left between the hydrothecæ (as in Laomedea geniculata); one hydrotheca to each internode; the internode terminating immediately above the hydrotheca and marked by a single stricture, or more rarely two. Hydrothecæ diverging at about an angle of 45° from the coenosarc, much elongated, simply tubular, fully twothirds as long as the internodes of the cœnosarc, and 3-6 times as long as their own diameter; a constriction near the base, at the point where the more strongly developed chitine of the base of the hydrotheca is exchanged for a membrane of more delicate structure. Height an inch and a half. Dredged in deep water in the Minch. Halecium sessile, Norman, n. sp. Hydrosoma slender, irregularly branching, branches not in the same plane; branchlets having alternate hydrothecæ, and a single constriction above each hydrotheca. Hydrothecæ very short and perfectly sessile, not rising at all separately from the hydrosoma, of the lateral projections of which they are mere openings, without being raised into any tube. Polypites large, not retractile, very narrow at the base, where they rise from the hydrotheca, thence gradually widening to near the summit, where they suddenly swell into a wide campanulate mouth surrounded by long and slender filiform tentacles; the polypites rise above the hydrotheca to a height (exclusive of tentacles) which is not less than five times its diameter, and far overtop the level of the succeeding hydrotheca. Height probably an inch and a half, though the fragments obtained are not more than half that length. Dredged in deep water in the Minch. The following is a list of the species which are now for the first time recorded as members of the British Fauna. Hippolyte cultellata, Norman, n. sp. Anonyx melanophthalmus, Norman, n. sp. tenuicornis, Lillj.+ Microprotopus maculatus, Norman, nov. gen. et sp. Mæra Lovéni, Bruz.* Bairdia obtusata, Sars §. complanata, Brady, n. sp. Cythere viridis, Müller . tenera, Brady, n. sp. * Bidrag till kännedomen om Skandinaviens Amphipoda Gammaridea, 1859. + Öfvers. af Kongl. Vetensk. Akad. Förhandl., 1855, pp. 123, 137. Annales des Sciences Naturelles, Cinquième Série, tom. iii. (1865) p. 226, pl. 4. $"Oversigt af Norges Marine Ostracoder," Vid.-Selsk. Forhand. 1865. Entomostraca, p. 64, tab. vii. figs. 1, 2 (and of Sars, but not of Lilljeborg). Cythere villosa, Sars*. ? subflavescens, Brady, n. sp. Cytheropteron nodosum, Brady, n. sp. ensiforme, Brady, n. sp. flexuosum, Brady, n. sp. Normani, Brady, n. sp. Hybernicum, Brady, n. sp. Polycope orbicularis, Sars*. Helgolandica, Claus ||. Longipedia coronata, Claus . Porcellidium fimbriatum, Claus ||. - dentatum, Claus **. Dyspontius striatus, Thorell ++. Drepanothrix hamata, G. O. Sars ‡‡. Scrupocellaria inermis, Norman, n. sp. Eschara quincuncialis, Norman, n. sp. , n. sp. Pennatula mollis, Alder, n. sp. Halecium geniculatum, Norman, n. sp. sessile, Norman, n. sp. P.S.-It will be observed that the list of Ostracoda given in the foregoing Report differs from that of Mr. G. S. Brady. This arises from the fact that the Reporter has had an opportunity of revising the lists at a much later period (May 10, 1867), when further time had allowed a more complete examination to be made of the material collected. The present lists, in the drawing up of which he has been assisted by Mr. Brady, have thus been rendered more full and more correct. Notices of some Invertebrata, in connexion with the Report of Mr. Gwyn Jeffreys on Dredging among the Hebrides. By JOSHUA ALDER. A SERPULA lately dredged by Mr. Jeffreys in the Hebrides, on the fragment of an old shell, possesses some interest in a physiological point of view, on account of the peculiar character of its shell. It is slender and strongly carinated through the greater part of its length, not unlike the common Serpula triquetra, but rather more slender. Near the mouth, however, there is an oblong bulbous swelling of the same substance as the shell, but rather less compact and more brittle; this terminates in a double arch in front. On * " Oversigt af Norges Marine Ostracoder,” Vid.-Selsk. Forhand. 1865. Entomostraca of the Tertiary Formation, p. 29, pl. 4. fig. 7. Annals and Mag. Nat. Hist. 3rd series, vol. xvi. (1865), pl. 9. fig. 9-11. § Entomostraca, p. 24, pl. 7. fig. 10-12. Die frei lebenden Copepoden, 1863. Die Copepoden-Fauna von Nizza, 1866. ** Beiträge zur Kenntniss der Entomostraken, figs. 19-22. Heft, Marburg, 1860, p. 8, tab. ii. tt Bidrag till kännedomen on Krustaceer som lefva i arter af slägtat Ascidia, S. 1859. Om de i omegnen af Christiania forekommende Cladoceren, 1861, p. 14, and Andet Bidrag, 1862, p. 51. examining its structure, we find that this bulbous portion consists of two cells, divided from each other by a thin wall of shell, and that the triangular tube of the general body is continued through its base, with the mouth of the tube opening generally immediately below it. In one instance, however, the tube is continued for a short distance in front of the swelling. Mr. Jeffreys suggests that this protuberance may be an egg-case, which I think is very probable, as there is a small external aperture in front of each partition, which apparently communicate with the tubular portion posteriorly. I am not aware that any similar structure has been before observed in the tubular Annelids; and I therefore now take the opportunity of bringing the circumstance under the notice of naturalists, in order that it may be investigated by those more immediately connected with the study of this department of zoology. The species appears to be a new one; but it is impossible to speak with certainty in the absence of the animal inhabitant of the tube. In one individual two of these protuberances have been formed, one behind the other. PENNATULA MOLLIS, n. sp. Polypary 4 or 5 inches long, of a brick-red colour, variegated with darker red streaks, slender, rather soft and flaccid. Stem slender, rounded, smooth, and very slightly bulbous at the base, occupying from one-third to half the length of the compound body. Rhachis smooth in front, except an undulating line of tubercles running at the base of the pinnæ on each side; the back of the rhachis has a smooth groove in the centre, on each side of which it is set with small pointed granules, smaller and less crowded than in P. phosphorea. Pinna compressed, flaccid, slightly fusiform, about half an inch long in the centre of the rhachis, but decreasing towards each end; these terminate in a rather obtuse point at the apex, and diminish gradually to minute processes below; they are placed a little further apart, are less triangular, and have a narrower base than those of P. phosphorea. Polype-cells cylindrical, set in a single row on the front margin of each pinna, and terminating as usual in eight denticles; they are rather shorter and less spiculose than in P. phosphorea, and number about twelve in each row of the longer pinna. This species has considerable resemblance to the Pennatula phosphorea of our coast, the differences between them, though well marked, being only comparative. It is larger, more slender, and much softer and more flaccid in all its parts than that species. This latter character arises principally from the fewer spicula in its composition, from which cause also it is of a paler and duller red, the colouring-matter being principally confined to the spicula. The pinnæ are not so crowded as in P. phosphorea, and are less firmly and broadly set on the rhachis, leaving a little more space in front. It is probable that this may be Pallas's Pennatula rubra, var. ß, of which he says, "Datur varietas, in oceano præsertim, longior, gracilior, pinnis angustioribus, magisque distantibus, caliculis pinnarum rarioribus et prominentioribus.' There can be little doubt, however, that this species is distinct from the P. rubra of Pallas, which is the P. phosphorea of British authors, and probably also of Linné. The differences between them are as great as is usual in other species of this genus. This is an interesting addition to our fauna, one species only of Pennatula having been previously known as British. Ascidia mentula. venosa. TUNICATA. Ascidia plebeia. aspersa. |