ISOPODS OF NORTH AMEKICA. 



687 



" Body oblono- o\;il; oi-outest wicltli not attaiiiiiio- half the U'liotli. 

 Dorsal face rather convex and perfectl}^ smooth and shining. Cepha- 

 lon of niodorat«^ size and ovonl}' rounded in front. Dorsal face trans- 

 verseh" grooved behind the eyes. Lateral parts of the three anterior 

 segments of mesosome but slightly prominent; those of the four pos- 

 terior segments somewhat larger and terminating behind in obtuse 

 points. Metasome scarcely exceeding in length on(^-third of the mcso- 



FlG. 730.— LiGIDIUM HYPXORUM (AFTEll SaRS). (I, MaNUIBI.E. b, FIRST ANTENNA. C, ANTERIOR 



i.ip. '?, Second ANTENNA, e, First antenna. /, Flagei.i.um of second antenna. </, Fir.st .max- 

 illa. //, Second MAXILLA. (, Dorsal view ok ke.male. ./, Ma.xilliped. A-, Mandibles. Z, Pos- 

 terior lip. /», First leg. «, Lateral view ok female, o, Seventh leg, p, Uropod. ij, First 



PLEOPODOF female. C. LaST SEGME.VT OF ABDOMEN AND TROPODA. .S, SECOND PLEOPOD OF MALE. 

 I. K.VTREMITV OF OUTER BRANCH OF UROPOD. 



some and miuli narrower, with the epimeral plates small and appressed; 

 last segment obtusely rounded at the tip. with a slight angh' on each 

 side. Eyes very large, oval, (extending down the sides of the ccphalon. 

 Antennuhe with the Hr.st joint rather thick; second longer, but nuuli 

 narrower; both armed at the tip inside with three rather long diverg- 



