242 MARINE INVERTEBRATES 
Order CUMACEA 
(Small, shrimp-like) 
Suborders Genera Species 
Diastylis D. quadrispinosus 
Order ARTHROSTRACA 
(No carapace, as a rule; sia to seven pairs of walking-legs; eyes sessile) 
Orchestia O. agilis 
AMPHIPODA Talorchestia T. longicornis 
(Body usually compressed Gammarus G. locusta 
laterally) Chelura C. terebrans 
Caprella C. geometrica 
Cirolana C. concharum 
Limnoria L. lignorum 
Spheroma S. quadridentatum 
I. marina 
aporoD. I. ochotensis 
(Body depressed or flattened) Idotea L. metallica 
I. wosnesenskii 
Chiridotea { Crees 
C. entomon 
Class 
MERISTOMES 
Order XIPHOSURA 
Limulus L. polyphemus 
Class 
PANTOPODA (Lang) 
Order PYCNOGONIDA 
Phoxichilidium  P. mavwillare 
