ISOPODS OF NORTH AMERICA. 153 



The clypeus is very narrow, very manifest wiien seen from below; 

 the labrum is partly concealed by the mandibles. 



The first and second pair of antenna^ are as in K. lif<sicauda. 



The mandi'blcs in the male are more prominent than in the female. 



The maxillipeds are furnished below with numerous little knots, for 

 the most part acute. 



The tirst two or three segments of the thorax have rather distinct 

 postmarginal furrows; the furrows on the posterior segments in the 

 male are quite distinct, in the female they are obscured more or less 

 by hairs. 



The epimera and the legs are almost as in E. antlllensiK. 



The five anterior segments of the abdomen are formed almost as in 

 E. antillensis. The last segment of the abdomen is almost as in E. 

 antillensis^ but differs from that species especially in having the 

 median excavation at the base shorter, the lateral tubercles rather 

 narrower, the apex furnished with five spines, and subacute, the 

 lateral margin not incised in the middle, and the dorsal surface fur- 

 nished with two thickl}^ setose areas. 



The uropoda extend somewhat be^^ond the abdomen; the ijuier 

 branch extends a little beyond the outer branch, is almost twice as 

 long as wide, and has the inner posterior margin rather curved, fur- 

 nished with spines and long hairs, the apex a little produced and acute. 

 The peduncle has the inner angle somewhat exceeding a third part of 

 the inner branch. 



The color is a brownish yellow. The male appendix is almost as in 

 E. tricornis. " 



«The above description is adapted from the following one of Hansen's: 



Diagn. (yor. fissicaudiv valde siniilis, segmento ultimo caud» fere ut in C. antil- 

 Icnsi formato, longiore, apice subacuto, margine lateral! in medio non inciso, dorso 

 areis duabus spisse setosis instructo, imprimis al) ea specie diversa. Long, maris 

 9, 7 mm., long. femin;e 11, 5 mm. 



Corpus circiter triplo longius quam latius; segmenta 4 posteriora trunci imprimis 

 ad raarginem posteriorem versus et segmenta 2-5 caudai in mare fere nuda, in femina 

 scabra, setis brevissimis, rigidis instructa; truncus in mare paulo longior et in femina 

 nonnihil longior quam cauda. 



Frons ut in specie prpecedente {C. JiK'^i cauda). 



Ocnli fere ut in specie pra^cedente, in mare nonnihil majores et plus convexi 

 (plain in femina; ocelli permagni in mare valde convexi, in femina paulo minus 

 I'onvexi. 



Lamina frontalis ut in Cor. fi.<iiiicauda. 



Clypeus perangustus, supinus visus perspicuus; labium ex ])arte a mandibulis 

 tectum. 



AntennuUe et antennje ut in Cor. tis.'<icauda. 



MandilniUe in mare plus i)rominentes quam in femina. 



Maxillipedes subtus nodulis complunl)us ex i)arte acutis armati. 



Segmenta duo vel tria anteriora trunci stria postmarginali paulnm distincta; 



