1921 J SchmiU: The Marine Decapod Crustacea of California 179 



B. Carpus rough, covered with overlapping, scale-like rugae, between two 

 and one-third and two and one-half times as long as wide. Carapace 

 strongly rugose, broken up into scale-like projections, most prominent 

 anteriorly, anterior edges of rugae piliferous. Ambulatory legs 

 very hairy. (Not known north of San Pedro.) 



rathbunae, p. 181. 



Petrolisthes cinctipes (Kandall) 

 Plate 32, figure 1 



Porcellana cinctipes Randall, Jour. Acad. Nat. Sci. Phila., 8, 136, 1839. 

 Porcellana rupicola Stimpson, Jour. Boston Soc. Nat. Hist., 6, 480, pi. 19, 



fig. 2, 1857. 

 Petrolisthes cinctipes Holmes, Occas. Papers Calif. Acad. Sci., 7, 107, 1900; 



Bathbun, H. A. E., 10, 168, 1904; Baker, Bept. Laguna Mar. Lab., 



1, 102, 1912. • 



Pig. 113. Petrolisthes cinctipes, natural size. 



Characters. — Carpus of chelipeds one and one-half times as long as wide, 

 anterior and posterior margins distinctly convergent distally; anterior or inner 

 margin with a prominent lobe at inner angle ; general surface of carpus granu- 

 lated rather than tuberculated ; anterior margin usually smooth, lobe at inner 

 angle well granulated. Carapace similar to P. eriomerus but with a greater and 

 more pronounced longitudinal convexity. Merus of ambulatory legs not hairy. 



Dimensions. — Type: length a little over 15.2 mm. Length of carapace of 

 specimens collected in San Praneisco Bay ranged from 2.5 to 13 mm., the greater 

 number were about 11 mm. long. 



Color. — Dark purplish red (Stimpson). Eeddish brown anteriorly, blue postero- 

 lateral^; three posterior pairs of feet blue, fascia te with white (Bandall). 



Type Locality. — Sandwich Islands (doubtful). 



Distribution. — From Vancouver Island, British Columbia, to the Gulf of Cali- 

 fornia (Bathbun). 



