83 RATHBUN 
S. gaimardi belcheri southward. <As typical S. gaimardii does not 
occur on the Pacific coast, I will compare the new form with S. gaz- 
mardi belcheri, and indicate the characters by which it differs from the 
latter. 
Female.—In S. townsendi the rostrum reaches almost or quite to the 
end of the acicle, and is armed above with 5 to 7 (2 on the carapace) 
spines, below with 
3 to 6 spines; the 
lower limb is deeper 
than in S. gaimardii 
belcheri, more as in 
typical S. gaimar- 
ait, but the rostrum 
is nearly straight. 
The pterygostomi- 
an spine is very 
small. The scale 
at the outer base 
of the antennula 
reaches to the end 
or nearly to the end 

Fic. 37. Spirontocaris townsendi. ¢%. Station 2865. a. Side (x 23). of the second seg- 
4. Dorsal view of anterior portion (x 3). ment; the second 
segment is scarcely longer than the third. The antennal scale is almost 
as long as the carapace. The maxillipeds reach to the distal fourth of 
the antennal scale; the fifth pair of feet do not attain the end of the 
maxilliped. 
The third abdominal segment is smoothly rounded, without lobe or 
angle, in a profile view; posterior margin produced moderately backward 
at the middle. The fourth segment is devoid of a lateral spine; the sixth 
is about twice as long as high; the telson is provided with 3 or 4 lateral 
spinules on each side. 
Male.—The males, which are fewer in number in the collection than 
the females, appear to be smaller and a little more slender; otherwise, 
save for their longer antennule, they present no differences from the 
females. 
Dimensions.—Female, approximate length 60.5 mm., of carapace and 
rostrum 20 mm., of rostrum 10.6 mm. 
Distribution.— Ranges from the Pribilof Islands to Puget Sound, and 
from 21 to 114 fathoms. One exception to this bathymetrical range is 
238 fathoms in Queen Charlotte Sound, British Columbia (4/batross 
