302 STALK-EYED CRUSTACEA 



I. Calappa. 



Calappa Fabricius, H. Milne Edwards, 



Miers. 



Lophos (subgenus)^ ,-. ,j- 



^ ^ ^^ ^ I . De Haan. 



G alius (subgenus) J 



Carapace very convex and tuberculated, rounded in 

 front, with the antero-lateral margins,regularly arcuated 

 and granulated or toothed ; and the postero - lateral 

 margins prolonged into two large rounded wings or 

 clypeiform expansions, which partly cover the walking 

 legs, with dentated margins. The front is very small, 

 triangulate or concave in the middle line. Orbits very 

 small, circular. Eye - peduncles short and robust. 

 Internal antenna? nearly vertically plicated. Basal joint 

 of external antennae usually more or less dilated, occupy- 

 ing the wide inferior hiatus of the orbit ; flagellum short. 

 The external maxillipedes do not entirely cover the 

 buccal cavity, which is narrow and prolonged in its 

 anterior part, and divided by a median septum ; the third 

 joint is not produced at its antero-internal angle ; the 

 fourth joint is subacute or distally truncated, and emargin- 

 ate at its antero-internal angle, where the next joint is 

 articulated. The first pair of legs is equal, very large, 

 and can be closely applied to the body ; third and fourth 

 joints triangular in section ; palm vertically very deep, 

 and laterally compressed, and armed above with a 

 stongly dentated crest ; the fingers of the right and left 

 hand are somewhat dissimilar usually, and have acute 

 tips. Walking legs slender and of moderate length, 

 with styliform terminal joints. The abdomen of the ma-e 

 covers the sternum at the base, between the base of the 

 last pair of legs, and is usually five-jointed. 



