128 RATHBUN 
second segment reaching the distal end of the third segment; the flagella 
are unequal, both exceed the antennal scale. The antennal peduncle 
reaches nearly to the end of the scale; the scale is short and broad, the 
blade is rounded at the end, strongly advanced at the antero-internal 
angle, and greatly exceeds the spine; the flagellum is one and a half 
times the length of the carapace. 
The maxillipeds surpass the antennal scale by nearly the whole length 
of the last segment. The first pair of feet are shorter than the maxillipeds 
but longer than the scale. Hands oblong, narrowing a little distally, or 
presenting a slight constriction at the base of the spine; three times as 
long as wide; anterior margin slightly longitudinal; spine short. The 
second and third pairs of feet are equally long, and shorter than the first 
pair; the fourth is shorter than the third, the fifth still shorter. 
The first to fourth segments of the abdomen are dorsally smooth; the 
fifth has a faint blunt median carina; the sixth is about one and a third 
times the length of the fifth and has four blunt carinz, two of which are 
submedian ; the lateral carinee converge posteriorly ; the posterior superior 
angles are armed with a strong spine, the inferior with a small spine; the 
telson has a deep median sulcus; the ridges on either side of it are armed 
with two pairs of spinules; the tip is triangular, pointed. 
The male differs from the female as follows: The spine at the antero- 
lateral angle is longer and more slender, and is sometimes directed out- 
ward. ‘The median carina is strong even to the posterior margin of the 
carapace, and its spines are higher. The maxillipeds are shorter, exceed- 
ing the scale by only half the length of the terminal segment. The 
carine of the fifth and sixth abdominal segments are stronger. The 
ventral surface of the thorax has a thin, strongly projecting carina, cut 
into four large saw-teeth. Each segment of the abdomen, except the 
last, has a median ventral spine. 
Dimensions.—Male (station 2881), length of body 32.6 mm., of cara- 
pace 9.1 mm., of antennal scale 4.2 mm. Female with eggs, length of 
body 36.2 mm., of carapace ro mm., of scale 4 mm. 
Distribution: 
Port Etches, Alaska, 12-18 fathoms (W. H. Dall). __ 
Off Cape Beale, Vancouver Island, British Columbia, 24-34 fathoms 
(Albatross stations 2879-2881). 
Puget Sound (Dana, Walker; also collected by T. Kincaid). 
Off Point Conception, California, 31 fathoms (A/bazross station 2908). 
Off San Miguel Island, California, 53 fathoms (4//azross station 2894). 
Dana describes the abdomen as smooth; the carina of the fifth seg- 
ment is very indistinct in the female, while Dana in his figure indicates 
two carinz on the sixth segment. 
