Narrative of Bahama Expedition. 157 



group, but one would think that the formidable spines would 

 render concealment rather a superlluous protection from most 

 of its enemies. Three species of Milhrax were secured from 

 comparatively shallow water. Indeed this genus is not repre- 

 sented in our collections from deep water. 



The famih- PARTiiiNOPiD.iS is represented in the West 

 Indies b}- numerous species of Lanibnis. and its allies, most of 

 wdiich are characterized by peculiarly shaped chelipeds. the 

 hand being trigonal and greatly elongated, and the fingers 

 very short. The old genus Lanibnis has been divided b\' 

 Milne Edwards into at least ten genera. Platylamhrus scr- 

 raliis (M. E.) was found in shallow water both here and at the 

 Tortugas, while Lanibnis fioiirtalesia Stm. was foimd in 

 abundance on the Pourtales Plateau proper, and also in deep 

 water off Havana, being one of the few species secured on 

 both sides of the Gulf Stream from deep water. Lanibnis 

 agoniis Stimp. has ver^' long and slender chelipeds, and is 

 one of the numerous species secured by Count Pourtales 

 during his memorable explorations of the Gulf Stream. The 

 same is true of L^anibnis fratcrciihis Stimp., with shorter chel- 

 ipeds and a carapace longer than'^ broad. The genus Solen- 

 olaiiibnis was separated from Lanibnis on account of its 

 smooth, polished carapace and other more technical charac- 

 ters. Our specimen of SoJenoIanibnis typiciis Stimp. differs 

 from all the other Maioids in the collection in being colored a 

 bright blue, this color covering the whole of the bod\' and 

 appendages, with the exception of pai'ts of the chelipeds. 

 The hand has ten very regular and conspicuous scallops on 

 the upper edge, and the edges of all joints of the chelipeds 

 are beautiful!}- crenulated. It came from a depth of about 

 fifty fathoms. In the original description of this species, the 

 color is not given. If our specimen is normal, we have here 

 a very unusual coloration for a comparativelv deep-water 

 Crustacean, (this species having been taken in depths of from 

 tifty to two hundred and forty-eight fathoms. ) Almost all the 

 other Crustacea secured by us from a greater depth than 

 twentv fathoms were either lackiiiLr in bri''"ht color or were a 



