NO. 1311. SOME NE W DEEP SEA CR USTA CEANS— BENEDICT. 275 



are well separated, the cilia are short and sliohtly iridescent; the lines 

 are for the most part unbroken. The gastric pair of spines is small, 

 and the other spines of the gastric row are very small; in some 

 specimens they should be designated as spinules. There are eio-ht 

 spines in the gastric row and two at the extremities of the first cili- 

 ated line, making ten spines on the gastric area. A large spine occu- 

 pies the area in the fork of the cervical suture and a second paii'cd 

 spine the l)order just behind the fork. 



The rostrum is about twice as long as the eyes; two or more 

 spinules break the continuit}^ of the sides; the upper liordcr is sub- 

 serrate. The supraocular spines are small and reacli only about the 

 middle of the eyes. 



The eyes are large, the cornea is much inflated, and the })eduncles 

 are very short. 



The inferior margin of the merus of the maxillipeds is armed with 

 a large spine on the proximal part and l)y a short spine on the distal 

 part. The merus of the chelipeds is armed with three rows of spines, 

 the inner row with seven, the middle with six. and the outer with nine. 



There are five spines on the carpus, three on the distal border, and 

 two small ones on the inner margin. The upper margin of the pahii 

 has a row of from ten to fourteen small spines. The ambulatory feet 

 are spinulose. The second segment of the abdomen has a line of six 

 spines, the third and fourth two each. 



Length of a large specimen, from the front to the end of the telson, 

 18 mm.; length of chelipeds, 39 mm.; of palm, 9 mm.; of fingers, 

 8 mm. Taken by the U. S. Fish Commission steamer Alh(di'os.'< at 

 several stations ofi St. Josephs Island, Gulf of California, in from 39 

 to 71 fathoms. 



Type.—Cfit. No. 20540, U.S.N.M. 



Variations: The gastric row of spines may have six spines in small 

 specimens. The rostrum may show several spinules or none. The 

 second segment of the abdomen may have l)ut one pair of spines in 

 some of the smaller specimens; usually six can be made out under a 

 lens. 



Genus MUNIDOPSIS Whiteaves. 



KEY TO THE SPECIES OF MUXIDOPSIS EXAMINED. 



0. Eye spines present. 

 h. Eye spines short, conical. 

 c. Chelipeds short, bearing but few spines. 



d. Carapace broadest behind; gastric area with six spines andeata, p. 315 



d. Carapace broadest in front ; gastricarea with two spines. .sMfesr/wajrto.sa, p. 327 

 c. Chelipeds elongated, bearing numerous spines. 

 d. Aljdonien unarmed. 



e. Auxiliary eye spine at the base of the large eye spine scabra, p. 325 



e. Auxiliary eye spine wanting tanneri, p. 327 



d. Abdomen armed hydrir, p. 321 



b. Eye spines long. 



