1921] Schmitt: The Marine Decapod Crustacea of California 115 
Genus Upogebia Leach 
First pair of legs subequal and subchelate; remaining pairs simple. Eye-stalks 
cylindrical; cornea terminal. Rostrum short, stout, tridentate. 
Upogebia pugettensis (Dana) 
Gebia pugettensis Dana, Proce. Acad. Nat. Sci. Phila., 6, 19, 1852; Crust. 
U. S. Expl. Exped., pt. 1, p. 510, 1852, pl. 32, fig. 1, 1855; Stimpson, 
Jour. Boston Soc. Nut. Hist., 6, 488, pl. 21, fig. 2, 1857; Lockington, 
Ann. Mag. Nat. Hist. (5), 2, 299, 1878. 
Upogebia pugettensis Holmes, Occas. Papers Calif. Acad. Sci., 7, 157, 
1900; Rathbun, H. A. E., 10, 153, 1904. 
a b 
Fig. 77. Upogebia pugettensis; a, lateral view of carapace, X 2 (after Dana) ; 
b, hand with setae removed, X 44 (after Stimpson). 
Characters.—Upper portion of carapace in front of cervical groove flattened, 
scabrous, and hairy; marked with three longitudinal grooves, median groove the 
shortest; front tridentate, with median tooth large, horizontal, and triangular, 
lateral teeth short. Eye-stalks sliort, reaching very little farther forward than 
lateral teeth of front. 
Dimensions—Type: length 50.8 mm. The length of the carapace of the Bay 
specimens ranges from 11 to 14 mm. 
Type Locality—Puget Sound. 
Distribution—From southeastern Alaska to San Quentin Bay, Lower Cali- 
fornia (Rathbun). 
Remarks.—This species excavates its subterranean burrows in the sand and 
mud of beaches, near low water marks, preferring that which is more or less 
indurated (Stimpson). 
Biological Survey of San Francisco Bay.—Although only three 
specimens were taken in the course of the survey, one at Sausalito, 
February 8, and two at Tiburon, April 29, 1913, Lockington says: 
This species is exceedingly abundant in San Francisco and Tomales bays, and 
frequently attains a length of six inches or even more. 
The subterranean passages made by it are usually nearly perpendicular, about 
an inch across, and very neatly rounded in section, with the walls smooth as if 
plastered, the smoothness resulting entirely from the pressure of the animal’s 
body as it pushes itself upwards and downwards by the action of its terminal 
abdominal segments. 
The burrows are not confined to strata of sand but are abundant also in mud, 
in sandy shingle, and even among rocks, ranging upwards almost to high-water 
