ISOPODR OF NORTH AMERICA. 151 



The maxillipeds are almost as in E. antillensis. 



The segments of the thorax are almost as in E. antillensis; the post- 

 marginal furrow is well defined only in the seventh segment; in the 

 fourth, fifth, and sixth segments it is somewhat distinct, formed prin- 

 cipally of points. 



The epimera are almost as in E. antillemis. 



The first five segments of the abdomen are a little more smoothly 

 formed than in E. antillensis. 



The last segment of the abdomen is short, about two-fifths wider 

 than long, posteriorly widel3 T rounded, not furnished with spines, but 

 furnished with a deep and rather wide median incision, the lateral 

 margin is entire; the dorsal surface is rather convex, not furnished 

 with densel} r setose areas, but ornamented with very short, scattered 

 hairs near the lateral margins, and furnished near the base with a 

 median excavation which has a carina in a rather short fundus, and 

 ornamented with acute tubercles rather close together and rather 

 small, and with lateral tubercles somewhat smaller than in E. antillensis 

 and not furcate. 



The uropoda extend some distance beyond the abdomen and are fur- 

 nished with hairs as in E. antillensis; the branches are equal in length; 

 the inner branch is rather wide, with the posterior part of the inner 

 margin somewhat curved outward, and furnished with a few spines; 

 the apex is a little produced and acute. 



The peduncle has the inner angle extending a little beyond a third 

 part of the inner branch. The color is brownish yellow. a 



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



Diagn. Clypeus, supinus visus, ex parte perspicuus, labrum obtectum. Anten- 

 nularum articulus basalis nonnihil incrassatus, pronus et supinus visus angustus. 

 Segmenta 5 anteriora caudee fere ut in Cor. nntillensi. Segmentum ultimum caudse 

 breve, postice late rotundatum et incisura media profunda, sat lata, instructum, mar- 

 gjne laterali non inciso, dorso ad basin nodis et nodulis ornato, areis spisse setosis 

 nullis. Uropoda caudam longe superantia, structura fere solita. Long. 11 mm. 



Corpus fere triple longius quam latius; truncus cauda aliquanto longior. 



Frons margine subrecto, processu medio inflexo, fere evanido. 



Oculi nigri, permagni, superficiem totam capitis pneter aream minorem mediam 

 ad marginem posteriorem occupantes; ocelli permagni, semiglobosi, ut in C. Warm- 

 ingii formati. 



Lamina frontalis fere triple longior quam latior, a basi ad mediam angustata, per 

 longitudinem majorem excavata, parte apicali subplana, ante rotundata. Lamina a 

 latere visa excurvata et prope apicem incurva. 



Clypeus supinus visus ex parte perspicuus; labrum obtectum. 



Antennulse circiter apicem articuli penultimi pedunculi antennarum attingentes; 

 pedunculus articulo primo nonnihil incrassato, prono et supino viso tamen angusto, 

 articulo secundo aliquanto breviore quam primo, graciliore; flagellum pedunculo 

 aliquanto brevior, c. 8-articulatum. 



Antenme structura solita. Mandibulae magnae, robustse, pars distalis mandibulae 

 sinistrae sat alte eminens, ut in speciebus sequentibus conum singulum formans. 



Maxillipeds fere ut in C. antillensi. 



Segmenta trunci fere ut in C. antillensi; stria postmarginalis solum in segmento 



