1921] Schmitt: The Marine Decapod Crustacea of Californa 271 
Distribution—From Oregon to Gulf of California; Japan; Korea. The 
locality given by Randall, the Sandwich Islands, is too doubtful to be relied upou 
(Rathbun). 
Remarks.—This is the very abundant shore crab which is so common scuttling 
over the stones of the higher beach. It sometimes contains a large parasitic 
isopod in its branchial cavities (Baker). 
Biological Survey of San Francisco Bay.—Pachygrapsus crassipes 
also proved to be a strictly littoral species, apparently less abundant 
and less widely distributed than Hemigrapsus nudus. Seven speci- 
mens were collected among the rocks at Point Bonita, and one each, 
on the Presidio shore, at Sausalito, and on Red Rock. 
Pachygrapsus transversus (Gibbes) 
Grapsus transversus Gibbes, Proc. Amer. Assoc. Adv. Sci., 3, 181, 1850. 
Goniograpsus innotatus Dana, Crust. U. S. Expl. Exped., pt. 1, p. 345, 1852, 
(OLE All, Gites Be sas}, 
Pachygrapsus transversus Rathbun, H. A. E., 10, 189, 1904; Proce. U. S. 
Nat. Mus., 28, 548, pl. 46, fig. 3, 1910; Bull. U. 8S. Nat. Mus., 97, 244, 
pl. 61, figs. 2, 3, 1918. 
Fig. 160. Pachygrapsus transversus, 3, X %5, right cheliped omitted (after 
Dana). 
Characters.—Carapace about one-third broader than long, lateral margins quite 
strongly convergent posteriorly from the last lateral tooth; upper surface trans- 
versely striated, most distinctly so anteriorly, becoming obsolete posteriorly ; several 
of the striae converge toward the lateral tooth on each side; sides with a well 
marked tooth behind the postorbital; frontal (interorbital) margin distinctly 
sinuous in frontal aspect. Hands smooth or finely granulate, with a raised, some- 
times obsolete line on the upper margin, and another on the outer surface, near 
the lower edge, running to the tip of the immovable finger. Merus of last pair 
of ambulatory legs with two or three sharply distinct teeth at the posterodistal 
angle. 
Dimensions.—Length of carapace 15 mm., width 20 mm. (Dana). 
Type Locality—Key West, Florida. 
Distribution California (Kingsley) to Peru; Galapagos Islands; Oriental 
region; West Africa; Bermudas; Bahamas and Florida Keys to Rio de Janeiro 
(Rathbun). 
