STALK-EYED CRUSTACEA 415 



compressed, and covered on the first joints with spine-Hke 

 tubercles. The segments of the abdomen have no trans- 

 verse keels. 



Range. — Martinique, St. Lucia. 



2. Elasmonotus abdominalis. 



ElasjHonotus abdominalis . . A. Milne Edwards, A. 



Milne Edwards and 

 Bouvier. 



The carapace is almost as wide in front as behind, and 

 its antero-lateral angle terminates in a short and sharp 

 point. The rostrum is wide, and its borders are parallel 

 for a great part of its length ; it reaches almost to the end of 

 the internal antennae and terminates in a sharp point; it has 

 a slight keel below. The eye-peduncles are mobile ; their 

 corneal surface is slightly developed. The peduncles of 

 internal antennae terminate in two large spines, of which 

 the lowest is the longest. The basal antennal joint has a 

 spine upon each of its angles. The legs of the first pair 

 are of unequal size ; they and the walking legs, which are 

 short and strong, have spines. The abdomen is smooth ; 

 upon its second and third segment there is a feeble 

 tranverse keel. 



Range. — Barbados. 



3. Elasmonotus armatus. 



Elasmonotus arviatns. . A. Milne Edwards, Hender- 

 son, A. Milne Edwards 

 and Bouvier. 



The carapace widens gradually from before backwards. 

 The antero-lateral angle terminates in a subacute point. 

 The rostrum, keeled below, rounded on its dorsal surface. 



