

FLATWORMS AND MESOZOA 



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. 

 Lond.), Professor of Natural History in the Queen's College, Cork 



POLYCHAET WORMS 



By W. Blaxland Benham, D.Sc. (Lond.), Hon. M.A. (Oxon.), 

 Aldrichian Demonstrator of Comparative Anatomy in the Univer- 

 sity of Oxford 



EARTHWORMS AND LEECHES 



By F. E. Beddard, M.A. (Oxon.), F.R.S., Prosector to the 



Zoological Society, London 



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 



ILotttJon 

 MACMILLAN AND CO., Ltd. 



NEW YORK : THE MACMILLAN CO. 

 I 901 



A II rights reserved 



