The British Journal of Psychology Edited by JAMES WARD and W. H. R. RIVERS. With the Collaboration of A. KIRSCHMANN, W. MCDOUGALL, C. S. MYERS, A. F. SHAND, C. S. SHERRINGTON, W. G. SMITH. NOW READY. Vol. I. Part 3. January, 1905. Price Be. not. CONTENTS. SMITH, NORMAN. Malebranche's Theory of the Percep HALES, F. N. Materials for the Psycho-genetic Theory of SMITH, W. G. A Comparison of some Mental and Physical CALKINS, MARY WHITON. The limits of Genetic and of SPEARMAN, C. Analysis of 'Localisation,' illustrated by a The Journal will be issued in parts at irregular intervals. Four parts will (usually) constitute a volume of about 450 pages Royal 8vo. The price to subscribers, payable in advance, will be 155. net per volume (post free). The price of single numbers will depend on the size of each number. Subscribers may send their names to any Bookseller or to the Cambridge University Press Warehouse, Ave Maria Lane, London, E. C. Papers for publication should be sent to Professor WARD, 6, Selwyn Gardens, Cambridge, or to Dr. W. H. R. RIVERS, St. John's College, Cambridge. London: Cambridge University Press Warehouse, Ave Maria Lane. C. F. CLAY, Manager. CONTENTS. The Morphology of the Vertebrate Head from the Viewpoint of the Functional Divisions of the Nervous System. By J. B. JOHNSTON. (From the Zoological Laboratory of West Virginia University.) With Plates I to IV. Literary Notices. 175 276 THE JOURNAL OF COMPARATIVE NEUROLOGY AND PSYCHOLOGY is published bi-monthly. The annual volume of six numbers comprises about 500 pages, with plates and text-figures. The subscription price is $4.00 a year, strictly net (foreign subscription, $4.30, 18 s., M. 18, 22 fr., L. 22), postage prepaid. Authors receive 50 reprints of their papers gratis and additional copies are supplied at cost. All MSS. and matter for review relating to the Structure of the Nervous System and all business correspondence should be addressed to the MANAGING EDITOR AT DENISON UNIVERSITY, GRANVILLE, OHIO. Editorial Matter relating to Comparative Psychology and the Physiology of the Nervous System should be sent directly to DR. ROBERT M. YERKES, PSYCHOLOGICAL LABORATORY, HARVARD UNIVERSITY, CAMBRIDGE, Mass. Entered as second-class matter in the Postoffice at Granville, O. J. MARK BALDWIN, Johns Hopkins University 8. I. FRANZ, McLean Hospital, Waverley, Mass. 8. J. HOLMES, University of Michigan B. F. KINGSBURY, Cornell University ADOLF MEYER, N. Y. State Pathological Inst. C. LLOYD MORGAN, University College, Bristol Published bi-monthly DENISON UNIVERSITY, GRANVILLE, OHIO II. III. IV. V. VI. REACTIONS OF FROGS IN NATURE TO SOUNDS. THE INFLUENCE OF SOUNDS ON REACTIONS TO OTHER STIMULI 1. Influence of sounds on respiration and visual reactions 2. Influence of sounds on tactual reactions. HEARING OF FROGS IN AIR AND IN WATER THE RANGE OF HEARING RELATION OF THE EAR TO REACTION TO SOUND VII. SUMMARY AND CONCLUSIONS I. HISTORICAL SETTING OF SUBJECT. 279 279 282 285 286 288 288 288 296. 298 301 303 I. Hearing in frogs and fishes. The question of the existence of a sense of hearing in frogs is not, as in fishes, an historical problem. For while the question, Do they hear? has been asked repeatedly concerning fishes, and answered as often with 'No' as with 'Yes', students of sense-physiology and animal behavior have assumed, without investigation, that frogs are stimulated.by sound. This unquestioning belief in the existence of hearing in frogs is doubtless due to the presence of a prominent ear drum and the ability to produce sounds. Frogs differ from fishes, with respect to the structure of the ear, in that they possess an ear-drum together with a bone which con |