192!] Schmitt: The Marine Decapod Crustacea of California 127 



Dimensions. — Type, male: (Cat. No. 3093, U. S. 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. 



Bemarlcs. — Similar to D. wood-masoni Alcock (1905, p. 85, pi. 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, Occas. Papers Calif. Acad. Sci., 7, 154, 1900 ; 

 Alcock, Indian Decapod Crust., pt. II, fasc. 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 



