OCn.AR AXirr.KXITAL PI.ATi ] j; t 



Table of Ocular Plate Arrangement and Variation in Strongylocentrotu* drobachientu from 

 Different Localities (text-figs. 135-149, 178, pp. 132, 134, 153). 



Italic numerals represent percentages, Arabic numerals the number of specie 



