Bathyal Amphipoda-— Barnard 325 
Fig. 7. Eusirella multicaelceola (Thorsteinson). Female, 8.0 mm, Albatross 4758: a, upper lip; b, mandible; 
c, maxilla 1; d, maxilla 2; e, maxilliped; f, g, gnathopods 1, 2; h—j, uropods 1-3. 
have been made so far do not warrant final 
conclusions in any of these matters yet. 
DISTRIBUTION: North Pacific: Gulf of Alaska, 
1000-1200 m tow; Kurile-Kamchatka Trench 
tows showing distribution between 500 and 
2000 m; east of the Ramapo Deep in a 0-5500 
m tow; Birstein and Vinogradov (I960) state 
that the distribution includes the Bering Sea 
but I am not aware of such a published record. 
Eusirella valdiviae is known from the South 
Atlantic about 30° S and K. H. Barnard’s ma- 
terial also came from that area. 
GENUS Rhachotropis Smith 
56, pi. 6; Birstein & Vinogradov 1955: 
275-276; Birstein & Vinogradov I960: 
.225. 
MATERIAL: One specimen from Albatross 
Station 4760, northeastern Pacific, 53° 53 / N, 
144° 53' W, 2200 fms, May 21, 1906. 
DISTRIBUTION: Northern Pacific: Gulf of 
Alaska, Hokkaido, southern California, and east 
of the Ramapo Deep, shallowest depth 930 m, 
greatest haul 5500 m but no closing hauls yet 
available defining greatest depth. 
family GAMMARIDAE 
Rhachotropis natator (Holmes) genus Melita Leach 
Gracilipes natator Holmes 1908:527-529, figs. 
32-34; Thorsteinson 1941:85, pi. 6, figs. Melita k °diakensis, new species 
67-70. Fl «- 8 
Rhachtropis natator , J. L. Barnard 1954:54- DIAGNOSIS: Antenna 1 scarcely longer than 
