CALIFORNIA STALK-EYED CRUSTACEA. 21 



antennal joint with a slender spine at the antero-extemal angle. Merus of 

 external maxillipeds with a prominent, obtuse lobe on the inner margin. 

 Chelipeds very long, slender, subcylindrical; fingers short, arched. Am- 

 bulatory legs very slender, shorter than the chelipeds; dactyls almost 

 straight. 



Type. E. spinosus RATH. 



Erileptus spinosus Rath. 



Erileptus spinosus EATHBUX M., Proc. U. S. Nat. Mus., Vol. XVI, 1893, 

 p. 227. 



Carapace spiny; gastric region with two spines arranged transversely and 

 a median spine behind; branchial region having a long spine with a 

 smaller spine in front of it and two spines on the margin; hepatic region 

 with a marginal spine; a spine on the cardiac area and a small spine on 

 the orbital arch. Eostrum slender, with spinulous margins. A small 

 postorbital spine some distance behind the eye. Chelipeds long, granu- 

 lated, merus with a spine above; hand slender, distally widened. A spine 

 on the first abdominal segment. 



Length 10 mm.; width 6 mm.; length of cheliped 28 mm. 



Off San Diego, California, 36 fathoms (Miss Rathbun). 

 I have not seen this species. 



Subfamily ACANTHONYCHIN^!. 



Eyes small, immobile, or only partially retractile; basal antennal joint 

 enlarged at base and narrowing distally. Rostrum bifid, or two-spined. 



Genus Epialtus Milne-Edw. 



Eostrum flattened, bifid or two-spined. Preocular spine present or 

 absent. Eyes more or less mobile. Legs of moderate length, the penulti- 

 mate joint not dilated aud compressed. Flagellum of the antennae concealed 

 beneath the rostrum. The carapace is smooth or slightly tuberculated 

 and the margins are not incised. 



Type. E. bituberculalus MILNE-EDW. 



