STALK-EYED CRUSTACEA 



2. Callinectes. 



Calllnectcs Ordway, Stimpson, A. Milne 



Edwards. 

 Portunns (part) . . . Fabricius, Latreille. 

 Lupea (part) .... Leach, Desmarest, H. Milne 



Edwards, Dana. 

 Neptumis (part) ... A. Milne Edwards. 

 SJierigo crab (local name) Berbice. 



The abdomen of the male has a broad base and then, 

 suddenly becoming very narrow, terminates in a narrow 

 lancet-shaped point. The fourth joint of the external 

 maxillipedes is strongly truncated at its antero-internal 

 angle, and very rounded outside and in front. The 

 endostome has a longitudinal canal to limit the anterior 

 orifice of the branchial chamber ; the epistome is pro- 

 longed in the middle line in a point which exceeds the 

 front and is visible on a dorsal view. 



Range. — Both coasts of America, West Indies, West 

 Coast of Africa ; found both in fresh and salt water in 

 the muddy coast water of British Guiana. 



Synopsis of the Species. 



A. Lateral epibranchial spine long; much larger than 

 the preceding tooth of the antero-lateral margin — {C. 

 diacanthus.) 



B. Lateral epibranchial spine short. 



a. A wide groove on sternal plastron, extending to 

 the base of external maxillipedes. — {C. bocourti) 



b. No groove on sternal plastron. — (C. cayenneftsis.) 



