THE CAMBRIDGE NATURAL HISTORY. 



Edited by S. F. Harmee, Sc.D., F.R.S., Fellow of King's College, 

 Cambridge, Superintendent of the University Museum of Zoology; 

 and A. E. Shipley, M.A., Fellow of Christ's College, Cambridge, 

 University Lecturer on the Morphology of Invertebrates. 



To he completed in Ten Volumes. 8vo. Price 17s. net each. 



Intended in all respects to be a Standard Natural History accurate enough to be 

 of use to the Student, and at the same time popular enough for the general reader 

 who desires trustworthy information as to the structure and habits of all members of 

 the Animal Kingdom, from the Protozoa to the Mammals. The Volumes are fully 

 illustrated by original figures drawn where possible from nature. When complete 

 the Series is one which should be indispensable in all Libraries, whether public or 

 private. 



NOW READY. VOLUME IL 



WORMS, LEECHES, ETC. 



Flatworms. By F. W. Gamble, M.Sc. Vict. , Owens College. Nemertines. By 

 Miss L. Sheldon, Newnham College, Cambridge. Thread-worms, etc. By A. 

 E. Shipley, M.A., Fellow of Christ's College, Cambridge. Rotifers. By 

 Makcus Hartog, M.A. Trinity College, Cambridge, D.Sc. Lond., Professor 

 of Natural History in the Queen's College, Cork. Poly chaet Worms. By W. 

 Blaxland Benham, D.Sc. Lond., Hon. M.A. Oxen., Aldrichian Demonstrator 

 of Comparative Anatomy in the University of Oxford.- Earthworms and 

 Leeches. By F. E. Beddard, M.A. Oxon., F.U.S., Prosector to the Zoological 

 Society, London. Gephjrrea, etc. By A. E. Shipley, M.A., Fellow of Christ's 

 College, Cambridge. Poly zoa. By S. F. Harmer, .ALA., Fellow of King's 

 College, Cambridge. 



CAMBRIDGE REVIEW. "Se\ersil of the s^oups treated of in this volume are unknown by 

 sight even to the general reader, and possess no popular name -whatsoever ; and as only a few in- 

 significant details are known of the habits of the animals composing them, their treatment in the 

 voUune before us has necessarily been to a large extent anatomical. This circumstance renders the 

 book of especial value to students, more particularly as in some cases the articles on the groups in 

 question are the first comprehensive ones dealing with their respective subjects. . . . Most of the 

 articles are of a very high order of merit taken as a whole, it may be said that they are by far the 

 best which have as yet been published. . . . We may say with confidence that the same amount of 

 infonnation, within the same compass, is to be had in no other zoological work." 



GUARDIAN. " Taken as a whole, the articles are by far the best that have been written on 

 their respective subjects, and the present volume will have a high value for zoological students 

 besides its attractions for the general reader.'' 



NATURAL SCIENCE. " This second volume of the Cambridge Natural History is certain to 

 prove a most welcome addition to English Zoological literature. It deals with a series of animal 

 groups, all deeply interesting to the specialist in morphology ; some important from their economic 

 relations to other living things, others in their life -histories rivalling the marvels of fairy-tales. 

 And the style in w'hich they are here treated is also interesting ; history and the early observations 

 of the older writers lend their charm ; accounts of habits and mode of occurrence, of life, in a word, 

 from the cradle to the grave, are given in ample detail, accompanied by full references to modern 

 and current literature. The whole is admirably illustrated." 



MACMILLAN AND CO., Ltd., LONDON. 



