of the Pacific Shores of North America. 455 
LIBINIA AFFINIS. Randall. 
Libinia affinis, RANDALL; Jour. Acad. Nat. Sci, Philad. viii. 107. GIBBES, 
Proc. Am. Assoc. 1850, p. 170. 
This species is rare, Nuttall’s specimen being the only 
one yet found. It is very closely allied to L. canaliculata of 
the eastern coast, but differs in its less convex carapax and 
smoother hand. | 
Upper California, (Nuttall.) 
Mus. Phil. Acad. 
CHORILIA LONGIPES. Dana. 
Chorilia longipes, Dana ; U. S. Expl. Expedition, Crust. i. 91; Pl. I. f. 5. 
This species may be distinguished from the other Oxy- 
rynehs of this coast by its long, bifid, pubescent rostrum, the 
forks of which are nearly parallel. The carapax is without 
pubescence, with a few distant tubercles and a sharp spine 
on each side at the branchial region. "The legs are long, 
and, with the exception of the first pair, very slender. It is 
about 1: inches in length. 
Oregon, (Expl. Exped.) 
Mus. Expl Exped. 
SCYRA ACUTIFRONS. Dana. 
Scyra acutifrons, Dana; U. S. Exploring Expedition, Crust, i. 95; Pl. II. f. 2. 
This little crab may be recognized by its ovate spineless 
carapax, the regions of which are strongly prominent; and 
by its short, bifid, lamellar rostrum. 
Puget Sound, (Pickering.) 
$. Expl. Exped. 
OTHONIA PICTETI. De Saussure. 
Othonia Picteti, Dg Saussure; Revue et Magasin de Zoologie, v. 357, PI. 
XIIL f. 2. 
| Mazatlan, ( Verreaux.) 
