no. 1G54. AMPHIPODA FROM WEST NORTH AMERICA— HOLMES. 529 



maxilla', with a single seta near the tip and a second smaller seta 

 near the first; outer plate with nine spines; first joint of palp about 

 twice as long as wide; second twice the length of the first. Second 

 maxilla 1 with large seta only around the tips of the plates. Maxilli- 

 peds with two spines and a few stout seta on end of inner plate; 

 outer plate reaching beyond the first joint of the very large palp; 

 claw of the palp long, narrow, and devoid of seta?. 



Hide plates very small, broader than deep, the first two produced 

 at the antero-inferior angle. First gnathopods a little shorter than 

 the second; carpus with a prominent posterior lobe; hand narrowly 

 oval, palm extending over most of the posterior margin, defined above 

 by a prominent spine, above which is a second smaller spine near 

 which on the inner surface of the hand is a cluster of five or six 

 spines. Second gnathopods with the posterior lobe of the carpus 

 longer and more narrow than the first pair; hand much like that of 

 the first, with two spines above the end of the palm, but having only 

 two spines on the inner surface near the upper marginal spine. 



First and second peraopods very slender, longer than the gnatho- 

 pods, armed with but few minute spines; dactyls very slender and 

 straight. Last three pairs of peraopods very long and slender, with 

 narrow basal joints; dactyls very long, slender, straight. 



Second and third abdominal segments with a dorsal carina, which 

 ends posteriorly in a spine; fourth segment with a dorsal carina but 

 no spine. 



Uropods extending backward to nearly the same point ; outer rami 

 a little shorter than the inner ; first and second uropods very sparsely 

 armed with minute spinules, the rami very slender and attenuate; 

 terminal uropods with lanceolate rami, which are broader and more 

 flattened than in the preceding pairs, and armed with several short 

 spines on the inner margin. Telson long and narrow, evenly tapering 

 to the notched tip which reaches the middle of the rami of the pos- 

 terior uropods. 



Length.- — 11 mm.; length of posterior peraopods 11 mm. 



Locality.— Station 4397, off Santa Catalina Islands, 2196-2228 

 fathoms, one female; Station 4427, of Santa Cruz Island, 447-510 

 fathoms, one female, type. 



Type.— Cat. No. 38551. U.S.N. M. 



GRACILIPES DISTINCTA, new species. 



Blind. Rostrum small. First antenna somewhat shorter than the 

 second; the first joint of the elongate peduncle twice as thick as the 

 second and nearly as long; third joint about two-thirds the length of 

 the second ; flagellum about two-thirds the length of the peduncle. 

 Second antenna with very long and slender peduncle, much exceeding 

 that of the first pair; flagellum shorter than the peduncle. Both 

 antenna devoid of calceola\ 



Proc. N. M. vol. xxxv— 08 34 



