STALK-EYED CRUSTACEA 327 



middle lobe advances in such a way as to exceed the 

 ocular peduncle when it is retracted. The postorbital 

 angle is short. The lateral edges have three teeth. The 

 first sternal segment is broad, and has a transverse ridge 

 uniting the bases of the second pair of legs. There is a 

 prominence behind each external maxillipede and the 

 first pair of legs. 

 Range. — St. Kitts. 



3. Cymopolia obessa. 



CynwpoUa obessa ... A. Milne Edwards. 



The carapace is thick, enlarged behind and embossed ; 

 the prominences are round and finely granular. Behind 

 they are arranged in a transverse line slightly bowed, 

 about four on each metabranchial lobe and two on the 

 anterior cardiac ; these last are the largest. The posterior 

 cardiac lobe has a protuberance, and the posterior edge 

 has six. The front is advanced and divided into four 

 small obtuse teeth ; the central is longest. The internal 

 orbital angle is rounded. The superciliary edge has two 

 triangular teeth. The postorbital angle projects, pointed 

 and directed forwards. The suborbital border has two 

 notches, and its internal angle is advanced and rounded 

 at its end. The lateral edges are armed with two teeth 

 separated the one from the other, the last more projecting 

 than the first. The legs of the first pair are very feeble 

 in both sexes. The walking legs are of moderate size; 

 the third and fourth pair are about the same length. The 

 fourth joint is rough and has a tooth above at its 

 extremity ; the fifth pair is very weak. 

 Range. — West Indian Sea. 



