CRUSTACEA 
CHAPTERS I anp III-VII 
BY 
GEOFFREY SMITH, M.A. (Oxon.) 
Fellow of New College, Oxford 
CHAPTER II 
BY 
THe Late W. F. R. WELDON, M.A. (D.Sc. Oxon.) 
Formerly Fellow of St. John’s College, Cambridge, and Linacre Professor of Human 
and Comparative Anatomy, Oxford 
VOL. IV £ B 
