20 STALK-EYED CRUSTACEA 



A. RosfrHin a single spine : — 



I. Anisonotus. 



Anisonotits . . . A. Milne Edwards. 



The carapace is subtriangular ; elevated anteriorly, 

 wide and depressed posteriorly. It extends, forwards, 

 far beyond the bases of the first pair of legs, and behind 

 it scarcely hides the sternum. The rostrum is very large, 

 a single spine, curved downwards. The eyes terminate 

 in a small point. Postocular spine very prominent, and 

 directed outwards. The basal joint of the external 

 antennae is keeled below, and partly exposed upon the 

 sides of the front ; the flagellum is thin, and scarcely 

 exceeds the rostral point. The antennular fossae are 

 wide and deep. The edges of the buccal cavity are 

 prominent. The fourth joint of the external maxillipedes 

 has the antero-external angle rounded. 



The pincers are weak, and the fingers are in contact 

 along their entire length when closed. The walking 

 legs are very long, especially those of the first pair. 

 The sternum of the male is keeled ; and the sixth and 

 seventh segment of the abdomen are soldered together. 



Range. — West Indian Sea. 



I. Anisonotus curvirostris. 



Anisono/us curvirostris . A. Milne Edwards. 



The gastric region is prominent, with a median spine 

 behind some tubercles ; at their base are some hooked 

 hairs. The cardiac region has a conical spine. There 

 are some hairs in the branchio-cardiac grooves. The 

 hepatic regions are narrow, and have on their edge a 



