492 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



longer than the carpus; anterior margin regularly pectinated with 

 short spines; dactyl a third the length of the carpus, inner margin 

 with several short spines. Fifth perseopods about two-thirds the 

 fourth; last joint straight, rounded at tip and about four-fifths the 

 length of the preceding one. 



Posterior angles of the last abdominal segment not produced. 

 Peduncles of uropods larger than rami although but slightly larger 

 than the inner ramus in the second pair. Peduncle of first pair with 

 outer margin serrate; margins of the other pairs smooth. Inner 

 rami slightly longer than the outer or equal in first pair, the margins 

 serrate except the outer margin of the outer ramus of the last pair; 

 outer margin of outer ramus of second pair smooth on basal half but 

 with small serrations distally. Telson broadly ovate, distally rounded 

 and about reaching middle of peduncle of last uropods. 



Length. — !> mm. 



Locality. — Station 4305, 2 specimens, off Point Loma, 67-116 

 fathoms. 



Type.— Cat. No. 38533, U.S.N.M. 



Legion GAMMARIDEA. 

 Family LYSIANASSIDJE. 



ORCHOMENELLA AFFINIS, new species. 



Eyes large, with numerous facets, widened below and light brown- 

 ish in alcohol. Lateral lobes of the head broadly rounded. First 

 anteniue not longer than the head and first thoracic segment. Second 

 antenna 1 are twice the length of the first. Epistome somewhat pro- 

 jecting. First gnathopods unusually stout, the carpus with a narrow 

 posterior lobe, closely fitting over base of hand; the latter nearly rect- 

 angular, slightly widened at base, palm transverse, slightly curved, 

 finely dentate, and armed with two stout spines at the end between 

 which the finger closes. Second gnathopods with the hand narrower 

 than the carpus and about half as long, and having the infero-pos- 

 terior angle produced so as to be almost chelate. Third abdominal 

 segment with the in ferodateral angle rounded and the posterior 

 margin above this smooth. Fourth segment with a rounded sinus 

 above, behind which is a rounded elevation. Terminal uropods with 

 the inner ramus shorter than the basal segment of the outer and 

 furnished with plumose seta 1 on the inner and three spines on the 

 outer margin: outer ramus with plumose seta 1 and a few spines on 

 inner margin, the outer margin armed with about eight short spines. 

 Telson cleft nearly to the base, the lobes diverging distally, the tip 

 with a spine on either side; lateral margins with three or four spines. 



Length. — 13 nun. 



