THE CAMBRIDGE NATURAL HISTORY EDITED BY S. F. HARMER, M.A., Fellow of King's College, Cambridge; Super- AND A. E. SHIPLEY, M.A., Fellow of Christ's College, Cambridge; VOLUME II By F. W. GAMBLE, M.Sc. (Vict.), Owens College NEMERTINES By Miss L. SHELDON, Newnham College, Cambridge THREAD-WORMS AND SAGITTA By A. E. SHIPLEY, M.A., Fellow of Christ's College, Cambridge ROTIFERS By MARCUS HARTOG, M.A., Trinity College, Cambridge (D.Sc. POLYCHAET WORMS By W. BLAXLAND BENHAM, D.Sc. (Lond.), Hon. M.A. (Oxon.), Aldrichian Demonstrator of Comparative Anatomy in the University of Oxford EARTHWORMS AND LEECHES By F. E. BEDDARD, M.A. (Oxon.), F.R.S., Prosector to the GEPHYREA AND PHORONIS By A. E. SHIPLEY, M.A., Fellow of Christ's College, Cambridge POLYZOA By S. F. HARMER, M.A., Fellow of King's College, Cambridge London MACMILLAN AND CO., LTD. NEW YORK: THE MACMILLAN CO. 1896 All rights reserved 54410 INTRODUCTION-DESCRIPTION OF THE POLYCLAD LEPTOPLANA TREMELLARIS -APPEARANCE-HABITS-STRUCTURE: POLYCLADIDA-CLASSIFICATION ANATOMY DEVELOPMENT: TRICLADIDA OCCURRENCE- PAGE CHARACTERS OF TREMATODES HABITS AND STRUCTURE OF TREMATODA ECTOPARASITICA (MONOGENEA)-LIFE-HISTORIES OF POLYSTOMUM IN- TEGERRIMUM, DIPLOZOON PARADOXUM, AND GYRODACTYLUS ELEGANS- TREMATODA ENDOPARASITICA (DIGENEA)-OCCURRENCE AND HABITS OF DIGENEA - LIFE HISTORY OF DISTOMUM MACROSTOMUM- - DISTOMUM |