NO. 1272. NEW DECAPOD CRUSTACEANS— RATHBUN. 897 
its posterior portion carinated, the carina defined on either side b}^ a 
deep groove like the imprint of a nail. 
Dlmensio7is. — Female, approximate length 61 mm.; length of cara- 
pace and rostrum 22 mm., of rostrum 12.5 mm. 
Type locality. — Admiralty Inlet, Puget Sound, iO fathoms, station 
2865, U. S. Fish Commission steamer Alhatross (Cat. No. 25268). 
Distrihution. — From Aleutian Islands to Washington, to a depth of 
48 fathoms. 
SPIRONTOCARIS TOWNSENDI. 
Closel}^ allied to S. (jcmnardii., and may be compared with S. 
gainiardii belcheri (Bell), which is the only form of S. gaimardU 
known to occur on the Pacific coast, and which ranges from the Arctic 
shores of Alaska and Siberia southward to Sitka. 
In the female of S. toimnsendi ., the rostrum reaches almost or quite 
to the end of the acicle and is armed above with 5 to 7 spines (2 on 
carapace), below with 3 to 6 spines; lower limb deeper than in S. 
galinardu helcherl; rostrum nearly straight. Pterygostomian spine 
very small. Scale at base of antennula reaches end or nearly to end 
of second segment; second segment scarcely longer than third. 
Antennal scale almost as long as carapace. The maxillipeds reach to 
distal fourth of antennal scale; the fifth pair of feet do not attain end 
of maxilliped. 
Third abdominal segment smoothly rounded, without lobe or angle 
in a profile view; posterior margin produced moderately backward at 
the middle. Fourth segment dev^oid of a latei'al spine; telson provided 
with 3 or 4 lateral spinules on each side. 
Dimensions. — Female, approximate length 60.5 mm.; length of 
carapace and rostrum 20 mm,, of rostrum 10.6 mm. 
Type locality. — Washington Sound, Straits of Fuca, 48 fathoms, 
station 2864, U. S. Fish Commission steamer Alhatross (Cat. No. 25269). 
Distribution. — From Bering Sea to Puget Sound, 21 to 114 fathoms. 
SPIRONTOCARIS MOSERI. 
Of the gainiardii group, but the maxilliped is without exognath, 
and the maxilliped and the first foot only are provided with an epipod. 
Rostrum about as long as or longer than carapace; teeth 6 to 8 alcove 
(2 on carapace), 4 to 7 below. Antennal spine strong; pterj'gostomian 
small. Eyes large, pyriform. The antennidar peduncle reaches to 
the middle or the distal third of antennal scale; second segment a little 
longer than third; spine of basal .scale reaches to middle of second 
segment. Antennal peduncle very stout and nearly as long as anten- 
nular; scale narrow-ov^ate, its outer margin about five-sevenths as long 
as carapace. The maxillipeds exceed the scale by one-fourth or more 
of the length of the last .segment. The first pair of feet overreach the 
Proc. N. M. vol. xxiv— 01 57 
