CALIFORNIA STALK-EYED CRUSTACEA. 21 



auteuual joint with a slender spine at the antero-external 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; dactjds almost 

 straight. 



Type. — E. spinosus Rath. 



Erileptus spinosus Rath, 



EriUpUis spinosus Rathbux 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. Rostrum 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 Eathbun). 

 I have not seen this species. 



Subfamily ACANTHONYCHIN.E. 



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

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



Genus Epialtus Milne-Ediv. 



Rostrum 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 and compressed. Flagellum of the antennse concealed 

 beneath the rostrum. The carapace is smooth or slightly tuberculated 

 and the margins are not incised. 



Type. — E. bituberculatus Milne-Edw. 



