CRUSTACEA 



CHAPTERS I AND III-VII 



GEOFFREY SMITH, M.A. (Oxon.) 



Fellow of New College, Oxford 



CHAPTER n 



The Late W. F. E. WELDON, M.A. (D.Sc. Oxon.) 



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

 and Comparative Anatomy, Oxford 



VOL. IV 



