3i6 STALK-EYED CRUSTACEA 



4. Ebalia. 



Ebalia . . . Leach, H. Milne Edwards, Dana, Bell, 



Desmarest, Latreille. 

 PJilyxia . . . Bell. 

 BeUidilia . . Kinahan. 

 Cancer . . . Pennant. 



Carapace transverse and often rather longer than 

 broad, suborbiculate or subrhomboidal, with the dorsal 

 surface moderately convex or depressed, uneven, tuber- 

 culated or obscurely carinated ; the front emarginated or 

 subtruncated or quadridentated ; the hepatic regions are 

 usually concave ; the lateral margins are entire or more 

 or less distinctly tuberculated or toothed, but the tubercles 

 are very rarely spiniform. The orbits are very small, 

 circular, with two or three closed marginal fissures and an 

 interior hiatus ; the eyes very small. Antennulary fossae 

 oblique, or nearly transverse. The external antennae are 

 very small, and their basal joint enters the interior orbital 

 hiatus. The buccal cavity is not separated from the 

 antennulary fossK by any distinct epistoma, and the 

 endostomian ridges are very strongly defined. The 

 external maxillipedes cover the whole of the buccal 

 cavity ; their fourth joint is triangulate, and the external 

 appendage, broad, has a somewhat curved exterior 

 margin. The first pair of legs, in the male, is subequal 

 and of moderate length, or more rarely considerably 

 elongated, with the fourth joint subcylindrical or some- 

 what trigonous; palm and fingers usually compressed. 

 Walking legs slender, small, with the joints usually 

 smooth ; last joint styliform. 



Abdomen, in the male, narrow, four or five-jointed, 

 with several of the intermediate segments coalescent; 



