30 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Chelipeds one half longer than the carapace; meriis with a long 

 spine on the inner edge and a short one on the upper edge, both 

 distant from the anterior extremity of the arm about one-third 

 of its length. Carpus with a very long spine at inner angle, which 

 spine is itself armed with two or three small spines on the anterior 

 edge; carpus also with three other spines and several spinules on 

 the upper-outer surface. Hand costate, three ridges on the outer, 

 two on the upper, and one on the inner side; of the superior ridges, 

 the outer one is armed with five spines and the inner one is denti- 

 culated and has a long spine at the summit anteriorly; fingers nearly 

 as long as palm, strongly carinate and irregularly dentate within. 

 Ambulatory legs of the third pair two and a half times as long as 

 carapace. Dactylus of swimming paddles broadly lanceolate, 

 pointed. 



Young. — A transverse ridge interrupted at the middle is apparent 

 on the gastric region. The frontal teeth are blunt, those of the middle 

 pair are rounded lobes. The lateral teeth are proportionally wider 

 and the intersinuses narrower. 



Color. — Dull red, grayish between granules; marginal spines 

 bright red. Ventral surface and appendages including proximal 

 portion of ambulatory legs pale red or tinged with red. Chelipeds 

 specked and slightly mottled with red. Terminal third of digits 

 scarlet, somewhat obscured at the tips by blackish. Merus and carpus 

 of legs and propodus of last leg specked and mottled with scarlet; 

 propodus of first 3 pairs, except a narrow band at distal end, and 

 dactyli of all four pairs, bright scarlet. (After Smith.) 



Measurements. — Male (11366), length of carapace including fron- 

 tal teeth 34.2, excluding teeth 32.4, width of carapace in front of lateral 

 spines 40.2, width between tips of lateral spines 52, fronto-orbital 

 width 27, width of front 11.6 mm. Longest specimen, with unusu- 

 ally short lateral spine, male (11366), total length of carapace 

 42.2, total width 63, wddth in front of lateral spines 52.9 mm. 



Range. — North Atlantic Ocean: From off Marthas Vineyard, 

 Massachusetts, to the Gulf Stream in Florida Straits; Europe, from 

 Norway to Great Britain and southward to Cape Verde Islands. 

 Mediterranean and Black Seas. Depth, 70 to 492 fathoms. 



Material examined. — See table, page 29. 



Genus COENOPHTHALMUS A. Milne Edwards 



Coenophthalmiis A. Milne Edwards, Crust. R6g. Mex., 1879, p. 236; type, C. 

 tridentattis A. Milne Edwards. 



Carapace almost quadrilateral. Front very wide, united with the 

 suborbital border for a considerable distance so as to completely 

 exclude the antenna from the orbit. Basal article of antenna short 

 and narrow; movable part reaching a little beyond outer orbital angle. 



