72 

 Family Hoplophoridce, Faxon. 



Acanthephyridx (part) and Tropiocaridse, Spence Bate, Challenger Crust. Macrnra, pp. 481, 927. 



Acanthephyridse, Stebbing, Hist. Crust., p. 242. 



AcanthepAyridse (part), Ortmann in Bronn's Thier Reich, Arthropoda, p. 1125. 



Boplophoridss, Faxon, Mem. Hus. Comp. Zool., XVIII. 1895, p. 159. 



Rostrum either moderately or very well developed. Antennular scale small 

 or quite rudimentary. Antennal scale long, narrow, more or less tapering. 



Mandible with a stout 3-jointed palp and with the incisor and molar pro- 

 cesses distinct but almost confluent, the molar process being small. The 1st and 

 2nd maxilla? and the 1st maxillipeds have the coxa and basis well developed, 

 though the coxa of -the 2nd maxilla? is strongly receding. The exopodite of the 

 1st maxillipeds is a broad simple falciform plate, without a flagellum. 



The terminal segment of the 2nd maxillipeds is variable : sometimes it is a 

 narrow plate attached along all its extent to the inner border of the propodite as 

 if it were a small complemental piece of that segment, sometimes it is a 

 distinct and independent dactylus. External maxillipeds stout, pediform. 



All eight pairs of thoracic appendages have well developed exopodites. 



The first two pairs of thoracic legs end in small but well formed chelae, 

 the 2nd pair having the carpus unsegmented. The last three pairs are of 

 moderate length the longest of them being never much longer than the 

 pace and rostrum combined, if so long and are of nearly equal size. 



Synopsis of the genera of Hoplophoridas qf 



I. Outer edge of antennal scale sharply serrated, /'^xopodites of all the 



maxillipeds and of the 1st pair of legs ^oliaceous ... HOPLOPHORCS. 



II. Outer edge of antennal scale entire : f$i the exopodites behind those 

 of the 1st maxillipeds have the u^ a i j ax i as h-like form : 



1. The thoracic legs are of # he usua i 8 j en( ier form ... ... ACANTHEPHYBA. 



2. Some or all of the thor cic ]egs ^ ave the ischium and merus 



broad, compressed/ and i ea f_iik e ... EPHYRINA. 



AlOPLOPHORUS, Edw. 

 Oplophorus, Milne Edwards, Hist. Niit. C\ st . n p< 423 . Spence Bate, Challenger Crustacea Macrura, p. 760. 



Body compressed. Rostru^ i ong s i en der, serrated dorsally and ventrally. 

 Carapace smooth, articulating ' w i tn t he abdomen on either side by a process 

 which is held by the produced a) n tero-lateral angle of the 1st abdominal tergum : 

 an antennal and a branchiop^ e g a i spine are present, in addition to the much 

 inflected orbital tooth. 



Abdomen more or Ie/ g3 carinatedj the carinse of the 3rd, 4th, and 5th terga 

 produced backwards as |[ long gpineg> Abdominal pleura deep but not very broad 

 fore-and-aft, except th^ oge of the 2nd somite in the female; those of the 3rd, 

 4th, and 5th somites are n^ ore or leag fa i cate> T e i son l ong and very acute. 



