SOME NEW DEEP SEA CRUSTACEANS— BENEDICT. 297 



The upper distal angle of the merus of the maxillipods is urnied 

 with a single spine; the corresponding angle of the following joint 

 with two. 



There are four lines of spines on the merus of the chelipeds: the 

 spines near the distal margin are long; there are seven i-ows on tiie 

 carpus; the palm is compressed and long; eleven spines on the crest 

 and fifteen on the low^er margin; a few spinules are placed on the 

 outer surface near the carpus and crest; the inner surface is smooth. 



The ambulatory legs have a single row of spines on the crest of the 

 meral and carpal joints; the meral joints have two additional rows 

 below. 



The carapace is 12.5 nuu. in length and 13.5 mm. broad. The I'os- 

 trum is 5.5 mm. long; the chelipeds 55 mm. in length. 



Locality. — AJhati'om station 2752, in 281 fathoms, lat. 13^ ol' 00" N., 

 long. 61^^ 04' 00" W., Lesser Antilles. 



Type.—Q.^i. No. 20564, U.S.N.M. 



UROPTYCHUS SCAMBUS, new species. 



The rostrum is triangular, its apex reaches the base of the cornea. 

 The front is cut back into semicircular orbits, which are continuous 

 with the rostrum on the inside and 

 nearh' so witn the finger-like projection 

 at the antero-lateral angles which guard 

 the outer angles of the orbital sinus. 

 The carapace is broader than long, 

 measuring 7 mm. in length to S nun. in 

 breadth, it is convex in all directions, 

 and has no marginal or other spines; 



the surface is glabrous: the sides are p-,,. ,i._UROPTYCHrs .cambu., x 2|. 

 prolonged at the antero-lateral angles 



into finger-like processes, which do not suggest spines. In shape the 

 carapace is triangular, with rounded posterior apices and the anterior 

 apex cut ofl' to make room for the eyes and other appendages. 



The merus of the maxillipeds is unarmed. 



The elongated chelipeds are unarmed, with the exception of some 

 slight projections at the distal margins of the merus and carpus and 

 two tubercles in the gape of the fingers. 



The ambulatory feet are cylindrical; the dactyls are subprehensile, 

 and armed beneath with a row of little spines which are hidden ))y a 

 dense growth of hair. 



It will be seen by the figures that this species is very closely related 

 to Uroptychushrevis oi the Antillian region; the subprehensile dac- 

 tyls common to both, in conjunction with the proportions of the cara- 

 pace, might well enough warrant generic distinction, if the genus as 

 at present constituted was overcrowded, which can hardly be claimed 

 for it. 



