1921] Schmitt: The Marine Decapod Crustacea of California 249 
Spe ocarcinus californiensis (Lockington) 
Plate 34, figure 7 
Eucrate? californiensis Lockington, Proc. Calif. Acad. Sci., 7, 33, 1876 
(1877). 
Speocarcinus californiensis Holmes, Oceas. Papers Calif. Acad. Sci., 7, 77, 
1900; Rathbun, H. A. E., 10, 190, pl. 9, fig. 1, 1904; Bull. U. 8. Nat. 
Mus., 97, 42, text fig. 16, pl. 10, figs. 2-3, 1918. 
Fig. 148. Speocarcinus californiensis, , X 1¥% (from Rathbun). 
Characters.—Carapace nearly smooth above but minutely granulated toward 
the pubescent margins; front over one-fourth the width of the carapace, anterior 
margin nearly straight and emarginate in the center; anterolateral margin strongly 
curved and furnished with three teeth, including the postorbital; the first two 
teeth are thin-edged and lobate, second tooth broadly rounded, and the third acute. 
Outer maxillipeds diverging anteriorly, the merus distally truncated, with antero- 
external angle rounded and not produced. Chelipeds unequal; carpus with a 
spine at the antero-internal angle and a short, longitudinal granulated ridge at 
the distal end of the outer surface; hands wide, much compressed, outer surface 
nearly smooth, but granulated near the upper and lower margins, upper edge 
acute and sharply granulated; fingers ridged, immovable finger not deflexed. Last 
pair of ambulatory legs upturned, and to a less extent the preceding pair also. 
Dimensions.—Type: length of carapace 20.8 mm., width 26.9 mm. 
Type Locality—San Diego, California. 
Distribution.—San Pedro, Anaheim Creek, and Alamitos Bay to San Diego, 
California. 
Remarks.—Lives in holes in muddy beaches (Holmes). 
Family PINNOTHERIDAE 
Carapace somewhat rectangular but frequently more or less rounded, usually 
more or less membranaceous; front, orbits, and eye-stalks usually very small, 
often rudimentary; anterolateral margin indistinct, entire. Antennules fold back 
transversely in an oblique direction. Small commensal or symbiotic crabs, living 
symbiotically or parasitically in the shells of bivalve molluses, corals, echinoderms, 
and worm tubes. 
