136 RATHBUN 
ing in two spines. Two other spines are placed at the posterior margin 
of this segment, one on each side. Fifth segment furnished with a sharp 
spine on the posterior margin near the median line; also a small spine 
on the lateral surface. Lateral faces of the first five segments sculptured 
by two irregular transverse furrows, sixth segment laterally with an 
indistinct longitudinal ridge. Pleura of first to fourth segments tri- 
angular, inferior angles blunt, without spines. Sternal crest low, dentate, 
terminating anteriorly in a spine. 
Dimensions. —Female, length 36.7 mm., length of carapace 11.5 mm., 
width of carapace between tips of antero-lateral spines 10.4 mm. 
Distribution.— Bering Sea, Aleutian Islands, and Alaska Peninsula, 35— 
150 fathoms. Taken by the Albatross at the following stations: 
Off Pribilof Islands, 54 and 150 fathoms, stations 3552, 3486. 
Pumicestone Bay, Unalaska, and vicinity, 35 and 59 fathoms, stations 
3322, 3319- 
Off North Head, Akutan Island, 56 and 72 fathoms, stations 2841, 2842. 
Off south entrance to Akutan Pass, 45 fathoms, station 2843. 
Northwest of Unimak Island, 43 fathoms, station 3262. 
Portlock Bank, 51 fathoms, station 2857. 
Marmot Isle, Kadiak, 45 fathoms (Sharp). 
Genus Nectocrangon Brandt. 
KEY TO THE SPECIES OF NECTOCRANGON. 
A. Carapace with only two median spines behind the anterior margin. 
B. Carine of sixth segment of abdomen not terminating in a small 
sharp tooth or spine. . . ; : : lar. 
B’. Carine of sixth segment terminating in a small sharp tooth or 
spine. 
C. All the abdominal segments carinated. 
D. Eyes with low tubercle. Spines of carapace appressed; those 
on anterior margin short. Hand ene about five times 
aslongas wide .. <% « 16, weentara, 
D’. Eyes with elongated sharp ‘tubercle. Spines of carapace sub- 
erect; those on anterior margin long, slender. Hand 
shorter, only three and a half to four times as long as wide 
ovifer. 
C’, The first and second abdominal segments not carinated 
californiensis. 
A’, Carapace with three or four median spines behind the anterior mar- 
gin. 
B. Carinz of sixth segment of abdomen terminating posteriorly in a 
small spine. . . «| +e 6 1) @laSkenses: 
B’. Carine of sixth segment of abdomen not terminating posteriorly 
in a small spine. 
C. First to fourth segments of abdomen carinated . . . crassa. 
C’. First to fourth segments of abdomen not carinated. . “evior. 
