A MONOGRAPH 



BRITISH 

 FREE AND SEMI-PARASITIC COPEPODA. 



VOL. III. 



GENERAL ANATOMY AND DEVELOPMENT 

 OF THE COPEPODA. 



IN preparing this monograph it was not part of 

 my plan to enter at all into the consideration of the 

 physiology or internal anatomy of the Copepoda, but, 

 in compliance with the wishes of some of my friends, 

 expressed while the first volume was passing through 

 the press, I have put together, in the form of a 

 preface to this third volume, a condensed account of 

 some of the more important observations which have 

 hitherto been made on this part of the subject. It will 

 be at once apparent that what I have attempted is 

 nothing more than a general outline, in the production 

 of which I have been greatly indebted to the works of 

 Glaus, Gegenbaur, and Huxley. Had I included the 

 truly parasitic species, in whose anatomy, physiology, 

 and general habits of life so many points of the highest 

 interest occur, I should have been travelling beyond 



VOL. III. A 



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