STALK-EYED CRUSTACEA 421 



laterally, and rounded above and below. The palm is as 

 long as the fifth joint; the fingers are slightly shorter 

 than the palm, hairy towards their extremity, which is 

 sharp and excavated within. The movable finger has at 

 its base a long fine tooth with a toothed edge. The 

 walking legs are smooth, slightly compressed ; the 

 second pain longest, the fifth shortest. 



The sternal plastron has on the middle line a groove ; 

 it is curved from before backwards, and notched in front. 



Range. — Barbados, Grenada, St. Vincent, Martinique, 

 Dominica, St. Lucia, Guadaloupe, St. Kitts, Santa Cruz; 

 in deep water. 



2. Uroptychus uncifer. 



DiptycJius uncifer .... A. Milne Edwards, A. 



Milne Edwards and 

 Bouvier. 



The carapace is smooth, except a spine at each 

 antero - lateral angle. The rostrum is prominent, and 

 terminates in a sharp point ; its edges are unarmed. In 

 length it reaches about the anterior margin of the cornea. 

 The first pair of legs short and strong. 



Range. — Barbados, St. Vincent. 



3. Uroptychus rugosus. 



Diptychus nigosns .... A. Milne Edwards, A. 



Milne Edwards and 

 Bouvier. 



The carapace is very short, narrow in front, and 

 terminates in a very long rostrum, which, like the upper 

 surface of the carapace, is covered with small spine-like 

 tubercles. The fourth joint of the first pair of legs has 

 spines. The fifth joint is rough; the hand is almost 



