48 RATHBUN 
basal three fourths thickened; inner flagellum one fourth or one third 
longer than outer; basal scale reaching only to middle of first segment, 
its distal outer angle almost a right angle. 
Antennal scale from three fourths to five sixths as long as carapace, 
tapering to the extremity, the laminar part of which is rounded, and much 
exceeded by the spine; peduncle reaching to end of second segment of 
antennular peduncle; flagellum equaling or exceeding the length of the 
body. 
Maxillipeds reaching nearly to end of acicle; first pair of feet to mid- 
dle of terminal joint of maxilliped. The right leg of the second pair may 
slightly exceed or fall short of the tip of the rostrum; merus slightly 
annulated; carpus with from 18 to 21 joints, those of the proximal half 
very indistinctly marked, the last joint as long as the two preceding; pro- 
podus the length of the last four carpal segments, palm longer than digits. 
Left leg of second pair one third or nearly half again as long as right 
leg; merus and distal portion of ischium faintly annulated; about 60 
carpal segments, hand and fingers much as in the right leg. Third leg 
of female reaching beyond the rostrum by one third or one fourth the 
length of the propodus. Fourth leg reaches one third or one half the 
length of the propodus of the third pair, while the fifth may reach beyond 
the middle of the 
} propodus of the 
fourth. Dactyli 
of the last three pairs contained about 
four times in their propodi. The third 
and fourth pairs of legs of the male differ 
from those of the female in having 
shorter propodi, that of the third scarcely 
overreaching the rostrum; the propodus 
of the third is also recurved instead of 
ates. ee ee Liane as straight and narrow at the extremity, 
Ane IES Ob y forming an oblique margin against which 
the dactylus folds; the dactyli of the last three pairs are contained about 
three times in their respective propodi. 
Abdomen two and a half times as long as carapace, smooth, non-car- 
inate, third segment very slightly produced backward in the middle; 
sixth segment one and two thirds as long as wide; seventh one and a half 
times as long as sixth, and with six spinules on each side. 
Dimensions.—Adult female (San Francisco market), length 110 mm., 
length of carapace and rostrum 50 mm., of rostrum 26.5 mm. 
Distribution.—¥rom Sitka, Alaska, to San Francisco, California. 


