918 Stimpson on the Crustacea and Echinodermata 
second pair, which is also destitute of tooth-like lobes; in 
the tooth on the inferior margin of the third article in the 
first pair of feet; and in its shorter and stouter antenne. 
From the latter, it differs in having oblong instead of trans- 
verse joints in the flagella of the inferior antenne; the 
flagella being also longer than their peduncles, which are 
not scabrous; there is also no two-jointed process on the 
third joint in the second pair of feet. 
O. Traskiana is exceedingly abundant in the vicinity of 
San Francisco, living among the rejectamenta along high- 
water mark. Were it not that I have had opportunity of 
comparing it with the original specimens kindly lent me 
by Prof. Dana, I should scarcely have believed that it was 
not identical with one of the numerous species already 
described from this coast. 
ALLORCHESTES PUGETTENSIS. Dana. 
Allorchestes Pugettensis, Dana ; U. S. Exploring Expedition, Crust. ii. 901, 
Pl. LXI. f. 6. 
Hab. Puget Sound, (Expl. Exped.) 
Mus. Expl. Exped. 
ALLORCHESTES SEMINUDA. Stimpson. 
Allorchestes seminuda, Stimpson; Proc, Cal. Acad. Nat. Sci. i. 90. 
Body somewhat compressed; eye oval; superior an- 
tenne three fifths as long as the inferior ones, with flagella 
consisting of thirteen sub-oblong joints; inferior antenn® 
two-fifths as long as the body, with 14-articulate flagella. 
On both pairs of antenne there are a few short setze at a 
extremity of each joint. Hand in the first pair of feet 
small, palm oblique, almost transverse ; finger of moderate 
‘size; carpus produced at its inferior angle into a sharp pro 
jection. Hand in the second pair rather large, oblong- 
