NOR TH AMERICAN INFER TEBRA TES. 277 

 Euryporeia. 



s expanding below into two diverging lobes. Telson long, deeply 

 :, conically tapering. Attains 62 mm. . E.gryllus (Mandt), A. 

 ior coxal plates twice as deep as their segments, 

 nterior gnathopods slender; carpus elongated; propodus narrow. 



Tryphosa. 



Eyes narrowly reniform. Hand of first gnathopods tapering 

 distally, palm transverse. L. 7 mm. Abundant. 



T. pinguis (Boeck), A. M. 

 Interior gnathopods rather stout. Carpus not elongated. 



E 1 h F h "^M^toal 



segment with a deep dorsal depression behind which is an 

 angular prominence. Infero-lateral angle of third abdominal 

 segment nearly a right angle. Propodus of first gnathopods 

 shorter than the carpus T. hbringii (Boeck), A. 



Vnu-nor gnathopods not subchelate Menigrates. 



Posterior peraeopods very short, the basal joints very large, 



P M obtusifnms Boeck, A. 



Anterior gnathopods subchelate Onesimus. 



Lateral lobes of head obtuse. Hand of anterior gnathopods 

 much longer than the carpus, slighdy curved ; palm nearly trans- 

 verse and finely denticulated. . . . O. edwardsii (Kr.). A. 



a small tooth. g Hoplonyx. 



Hand of first gnathopods distally tapering: palm transverse. 

 Lateral lobes of head only slighdy projecting and rounded. 

 Upper part of eyes narrow. Attai 



Later 



.turned 

 imperfect. 



