490 Stimpson on the Crustacea and Echinodermata 
arises a small but prominent blunt tooth, which curves 
upward. Movable finger half as long as the hand, with 
hooked extremity ; inferior edge swelling out near the base, 
and minutely denticulated. Both fingers hirsute with scat- 
tered tufts of hair. Color of the body a delicate orange; 
anterior feet rose-colored. Length, three inches. The pro- 
portional dimensions as compared with the other species, 
will be given in the table under C. longimana. In this 
species, I have seen only one case in which the left hand is 
the larger. 
Hab. San Francisco Bay, near its mouth, (Trask ;) Fort 
Steilacoom, Puget Sound, (Suckley.) 
Mus. Smithsonian; Cal. Acad. 
CALLIANASSA LONGIMANA. Stimpson. 
Plate XXI. f. 5. 
Callianassa longimana, Stimpson ; Proc. Bost. Soc. Nat. Hist. vi. 86. 
A slender species, closely allied to the preceding, from 
which it may be distinguished by the following characters : 
It is more slender and elongated, and grows to a larger 512% 
being often four inches in length. The outer maxillipeds 
are less broad. "The larger foot of the anterior pen (see : 
figure,) which is most frequently on the left side, Is me 
slender and less hairy than in the preceding species, wi 
the hand much longer and of equal breadth with the 
carpus. In our species the carpus is shorter than the body 
of the hand, while in C. Californiensis it is longer. In the 
smaller chelopod, the fingers are of equal length in oUr 
species, while in C. Culiforniensis the finger exceeds the 
thumb in length. With C. gigas our species et S 
be confounded on account of the great difference 1" t 
length of the hand. The three species resemble each other 
very much, however, in general appearance and € E 
other than those derived from the chelopoda. The follow 
ing table will show their relative proportions um 
