STALK-EYED CRUSTACEA 223 



3. Epilobocera. 



Epilobocera . . Stimpson, M. J. Rathbun, Ortmann. 

 OpistJioceva . . Smith. 



Resembles the genus Potauwcaninns The internal 

 suborbital lobe covers the external antennce, but does not 

 exclude it from the orbit. The flagellum of the antennae 

 is situated in the internal canthus of the eye. 



The fourth joint of the external maxillipedes is trans- 

 verse, with the anterior margin rounded. The external 

 appendage (exognath) is longer than the third joint. 



There is a projecting process from the upper side of 

 the expiratory canal. 



Synopsis of the Species. 



''A. Front without superior crest; exognath consider- 

 ably overlapping fourth joint of external maxillipedes; 

 spine of efferent channel narrow. — (Zs. gi/nmnii.) 



" B. Front with superior crest ; exognath slightly over- 

 lapping fourth joint of external maxillipedes ; tooth of 

 efferent channel short and broad. 



"a. Fourth joint of external maxillipedes broad, its 

 outer and anterior margin arcuate. 



" a^. Width of carapace varying from 1.56 times the 

 length in small specimens to 1.64 times the length in 

 large specimens. 



"«^ Anterior-lateral teeth spiniform. — (E. armata.) 



" d^. Antero-lateral teeth dentiform. — (E. cubcnsis?) 



'' b^. Width of carapace of small specimens 1.7 times 

 the length. — {E. granulata.) 



" b. Fourth joint of external maxillipedes narrow, 

 subquadrate, with an antero-external angle. 



