CRUSTACEA 



CHAPTERS I AND III-VII 



GEOFFEEY SMITH, M.A. (Oxox.) 



Fellow of New College, Oxford 



CHAPTER II 



THE LATE W. F. E. WELDON, M.A. (D.Sc. OXON.) 



Formerly Fellow of St. John's College, Cambridge, and Liuacre Professor of Human 

 and Comparative Anatomy, Oxford 



VOL. IV 



