U. S. NATIONAL MUSEUM 



BULLETIN 93 PL. 73 



2e 



3a 



y i 



,kC 



% 



-^ 



3b 



4a 



J 



1-1B, CHTHAMALUS CAUDATUS; 2-2C, C. WITHERS; 3-3b, C. dalli ; 4, 4a, C. 



SCABROSUS. 



For explanation of figures see page 357. 



