226 STALK-EYED CRUSTACEA 



and shape. The front has a superior crest, with its 

 inferior margin projecting beyond the superior. 



The fourth joint of the external maxillipedes is 

 narrow, subquadrate, with an antero-external angle ; the 

 external appendage slightly overlaps it. The tooth of 

 the efferent channel is short and broad. 



Range. — Hayti, San Domingo. 



6. Epilobocera sinuatifrons. 



Epilobocera sinuatifrons . . A. Milne Edwards, M.J. 



Rathbun. 



Carapace slightly convex. Front with a superior 

 crest, with the inferior margin not projecting beyond 

 the superior. 



The fourth joint of the external maxillipedes is 

 narrow, subquadrate, with an antero-external angle ; the 

 external appendage slightly overlaps it. 



Range. — Porto Rico, Santa Cruz. 



4. Rathbunia. 



Rathbunia .... Nobili. 



Resembles the genus Pseudothelphusa, only the fourth 

 joint of the external maxillipedes is very narrow pos- 

 teriorly where it articulates with the outer half of the 

 anterior margin of the third joint. 



I. Rathbunia festae. 



RatJibunia fcstce .... Nobili. 



The same as the genus. 



Range. — United States of Colombia. 



