NO. 5 CLARK: ECHINI OF WARMER EASTERN PACIFIC 321 



A C GRANDIS 



o'E. 



PERSPECTIVA 



C t. WETMOREI 



D' E. LAE 



VIS 



K' E. 



INSULARIS 



Text figure 2. Outlines of transverse sections of same specinnens at 

 areas of greatest thickness or height. 



