1921] Schmitt: The Marine Decapod Crustacea of California 249 



Spe"ocarcinus calif orniensis (Lockington) 



Plate 34, figure 7 

 Eucrate? calif orniensis Lockington, Proe. Calif. Aead. Sci., 7, 33, 1876 



(1877). 

 Speocarcinus calif orniensis Holmes, Oecas. Papers Calif. Acad. Sci., 7, 77, 



1900; Eatbbun, H. A. E., 10, 190, pi. 9, fig. 1, 1904; Bull. U. S. Nat. 



Mus., 97, 42, text fig. 16, pi. 10, figs. 2-3, 1918. 



Fig. 148. Speocarcimis calif orniensis, £, 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-iuternal 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 defiexed. 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 molluscs, corals, echinoderms, 

 and worm tubes. 



