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 SP1NICORNE. Stimpson. 

 Corophium spinicorne, Stimpson ; Proc. Cal. Acad. Nat. Sci. i. 89. 



This species is rather thick and robust in shape. The 

 inferior antennae 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 

 antennae slender, and but little shorter than the inferior 

 ones. Feet well brushed with plumose hairs ; those of 

 the first pair with minute subcheliform hands, with the 

 palm transverse ; third and fourth articles with long setae 

 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 fourth 

 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 is 

 scarcely cultriform. Color brownish, darkest at the head, 

 with transverse bands of light yellow corresponding to the 

 segments ; antennae brownish. Length, 0.4 inch ; breadth 

 at the fifth thoracic segment, 0.08 inch. 



It is common among confervae, etc., in the little creeks of 

 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 from 

 Puget Sound, in the museum of the Smithsonian Institu- 



