104 RATHBUN 
strongly arched over the eye, and armed with 12 to 14 small teeth; the 
posterior 3 or 4 behind the orbit, the posterior 2 distinctly separated from 
the others; the hindermost is much depressed, obsolescent; the distal 
third of the rostrum is 
straight, either horizon- 
tal or slightly deflexed, 
acute, unarmed above, 
furnished with 1 or 2 
teeth below; lower limb 
very narrow. Antennal 
spine well developed, 
pterygostomian very 
small. 
Eyes large, pyriform. 
Fic. 47. ee avina. Station 2853. _a@. Side of carapace Antennular peduncle 
xX 3). 4. Dorsal view of anterior portion (x 4). extending two thirds 
the length of the antennal scale, second segment three times as long as 
third, outer basal scale suberect and not reaching end of first segment; 
flagella subequal in length; thickened part of outer one extending half 
its length beyond antennal scale. Outer margin of antennal scale a 
little more than two thirds as long as carapace, scale tapering, distal 
margin very oblique, peduncle extending quite to middle of scale and 
nearly to end of second segment of antennular peduncle. 
The outer maxillipeds extend beyond the scale by nearly half the 
length of their last segment. First pair of feet reaching half-way 
between antennal peduncle and end of scale; second pair exceeding 
maxilliped by the length of the propodus and the last joint of the carpus ; 
third to fifth pairs nearly equal, the fifth pair overreaching the second 
pair; dactyli very slender and unarmed. 
Abdomen smooth; fourth segment furnished with a lateral spine; 
sixth segment a little less than twice as long as fifth, and shorter than 
seventh, which bears 3 spinules on each side. 
Male.—Smaller, more slender, and has slightly longer antennule than 
the female. 
Dimensions. —Female, length 35 mm., length of carapace and rostrum 
12 mm., of rostrum 3.5 mm. 
Distribution.—From Pribilof Islands to Oregon, 41 to 351 fathoms. 
Taken exclusively by the A/batross, at the following localities: 
Off Pribilof Islands, 60-184 fathoms, stations 3484, 3485, 3489, 3494, 
3605, 3609. 
North of Unalaska, 165-351 fathoms, stations 3315, 3317, 333° (type 
locality), 3331. 

