514 Stimpson on the Crustacea ‘and Echinodermata 
Found on seaweeds, etc., below low-water mark in San 
Francisco Bay, near its entrance. 
Mus. of the North Pacific Expedition. 
COROPHIUM SPINICORNE. Stimpson. 
Corophium spinicorne, Stimpson ; Proc. Cal. Acad. Nut. Sci. i. 89. 
This species is rather thick and robust in shape. The 
inferior antenne are half as long as the body, without fla- 
gella, and with a large, curved, sharp-pointed spine at the 
inferior extremity of the very thick antepenultimate article. 
There is also a stout spine beneath on the basal article, 
and a small one at the inner base of the penult. Superior 
antenne slender, and but little shorter than the inferior 
ones. Feet well brushed with plumose hairs; those o 
the first pair with minute subcheliform hands, with the 
palm transverse; third and fourth articles with long sete 
along the inferior edge. Feet of the second pair simple, 
but with the third and fourth joints conjoined laterally, as 
if forming a hand, not however subcheliform; the fourt 
article is placed inferiorly and fringed with long hairs. 
Caudal stylets placed rather underneath than on the sides 
of the abdomen, but otherwise much as in C. longicorne, 
except that the external ramus in the second pair 15 
scarcely cultriform. Color brownish, darkest at the head, 
with transverse bands of light yellow corresponding to the 
segments; antenne brownish. Length, 0.4 inch; breadth 
at the fifth thoracic segment, 0.08 inch. f 
It is common among confervæ, ete., in the little creeks 0 
the salt marshes on the shores of San Francisco Bay. 
Mus. N. P. Exp. ; 
COROPHIUM SALMONIS, Stimpson, n. s. 
In examining anatomically a species of salmon sen 
Puget Sound, in the museum of the Smithsonian m 
