no. 1654. AMPHIPODA FROM WEST NORTH AMERICA—HOLMES. 5^1 



narrowly oval, palm relatively a little shorter than in the first pair, 

 furnished with two marginal spines at the upper end, near which is 

 a pair of stout spines on the inner surface. 



Second pair of perseopods (the first pair broken in specimen) very 

 long and slender, the basal joint armed behind with about ten spines; 

 dactyl very slender, tapering, slightly curved and much elongated, ex- 

 ceeding the length of the propodus, which is also long. Basal joints 

 of the posterior pairs of perseopods narrow ; merus narrow and elon- 

 gated. Marsupial lamellae very large. 



First three abdominal segments with a dorsal carina which ends 

 posteriorly in a spine; infero-lateral angles of second and third seg- 

 ments broadly rounded. First uropods with flattened lanceolate rami, 

 which are broader than in the preceding species and furnished like the 

 somewhat longer peduncle with several spines ; terminal uropods with 

 flattened subequal lanceolate rami which are armed on the outer mar- 

 gin with several spines. Telson long, broader than in the preceding 

 species, the sides nearly parallel up to the posterior third, whence they 

 taper to the emarginate tip. 



Length. — 8 mm. 



Locality. — A single female specimen from Station 4429, off Santa 

 Cruz Island, 506-680 fathoms. 



Type.— Cat. No. 38552, U.S.N.M. 



In the single specimen of this species in the collection the last three 

 pairs of peraeopods were broken off at the end of the merus. The 

 species closely resembles the preceding in many characters, but the 

 maxillipeds have a longer and more pointed outer plate, the gnatho- 

 pods have broader hands and the coxal plates not produced anteriorly, 

 the second perseopods have a longer and more curved dactyl ; the first 

 and second uropods have broader rami armed with stouter spines, and 

 the telson is broader and otherwise different in shape. 



Family PLEUSTID^]. 



NEOPLEUSTES OCULATUS, new species. 



Rostrum short; lateral lobe of head triangular, rounded at tip, 

 lower angle of head produced into an acute, triangular lobe. Eyes 

 fairly large. First antenna? over half the length of the body; first 

 joint as long as the next two; third about half the length of second. 

 Second antennae, about two-thirds the length of the first; last two 

 joints of peduncle subequal. 



Upper lip with unequal rounded lobes. Mandibles with rudi- 

 mentary molar tubercle, cutting edge broad, with many teeth ; acces- 

 sory plate on one mandible broad and furnished with many teeth; 

 third joint of palp armed with three or four spinelike bristles at tip 

 and with about eight shorter ones on inner margin. First maxilla) 



