CRUSTACEA OF THE DEEP SEA 135 



closely resemble in the arrangement of the grooves 

 upon the carapace the extinct Prosoponidae, which 



I 



Fig. 47 — Eryon propinquus, One of the Fossil Eryonidea, from 

 THE Jurassic Rocks of Solenhofen. (From Lankester's 

 '* Treatise on Zoology," after Oppel.) 



are known as fossils from Jurassic and Cretaceous 

 rocks. 



