1921] Schmitt: The Marine Decapod Crustacea of California 127 
Dimensions.—Type, male: (Cat. No. 3093, U. 8S. N. M.) length of carapace 
21 mm., of anterior portion 10.5 mm., of large hand 17 mm., width 9 mm., length 
of large cheliped measured in a straight line (chord) 34 mm. 
Type Locality—San Francisco Bay, collected in 1880 by Dr. D. S. Jordan. 
Remarks.—Similar to D. wood-masoni Alcock (1905, p. 85, pl. ix, fig. 3), from 
the Maldive and Andaman Islands, but the large cheliped is relatively not so long. 
As described, the length of the large cheliped of D. wood-masoni, measured in a 
straight line (chord), is twice that of the sagittal line of the carapace, while that 
of our species measured in the same manner is but one and a-half as long as 
such a line. Moreover, as figured by Alcock the anterior portion of the carapace 
is wider than long and a little shorter than the rest (soft posterior portion) of the 
carapace measured on the median line. In our species the anterior portion of the 
carapace is a little longer than wide and equal to the posterior portion in length. 
D. wood-masoni does not show the sudden reduction in width of the carpus of the 
larger cheliped from the wide distal margin to the narrower proximal portion. 
This specimen is a rather remarkable find in that it represents a great north- 
ward extension of the range of the genus on the Pacific coast of America. Strange 
to say it has not been taken since or elsewhere on the coast. Dr. Jordan, to whom 
I have submitted the tin tag (no. 627) found in the bottle with the specimen 
says, ‘‘ Undoubtedly the locality is correct because I took a good deal of pains to 
pick up such things around San Francisco,..., but I fear that I cannot add any- 
thing. We used to follow the Chinese shrimp-fishermen with their fine nets 
about the Bay, and a good many crabs came in in that way.’’ It was entered 
in the museum catalogues in 1881. 
Genus Holopagurus Holmes 
Left cheliped slightly larger than the right. Fourth pair of legs subchelate. 
External maxillipeds approximated at base. No paired appendages on the anterior 
abdominal segments of either sex. 
Holopagurus pilosus Holmes 
Plate 17, figure 2 
Holopagurus pilosus Holmes, Ocecas. Papers Calif. Acad. Sci., 7, 154, 1900; 
Alcock, Indian Decapod Crust., pt. II, fase. 1, pp. 25, 162, 1905. 
Characters.—Median projection of front small, blunt, and rounded, reaching 
about as far forward as, but not exceeding lateral ones. Carapace from corneae 
of eye-stalks to posterior margin characteristically and strikingly triangular in 
general appearance. Eye-stalks set very close together, about two-thirds the length 
of the anterior portion of the carapace, corneae not dilated. Anterior portion 
of carapace, taken alone, is quite square in form. Chelipeds of similar form, fur- 
nished with long hairs and short spines; hands horizontally flattened and covered 
with scattered spines, which are larger and more thickly set near the rounded 
margins; palms gently convex, but with a transverse depression just anterior to the 
base of the fingers, which makes them appear pronouncedly bent upward, larger 
hand widest across base of the fingers, beyond which it is abruptly contracted, 
fixed finger rather narrow a short distance beyond the base; smaller hand rela- 
tively narrower than the larger, inner and outer faces parallel, fixed finger not 
so much contracted beyond the base as in the larger hand, its outer margin evenly 
convex near the base and not slightly concave like its fellow. Dactyls of ambu- 
latory legs long, gently curved, flattened toward the tip, subcylindrical at the 
