CALIFORNIA STALK-EYED CRUSTACEA. 107 



Petrolisthes cinctipes (Randall). 



Porcellana cinctipes RANDALL, Jouru. Acad. Nat. Sci. Phila., Vol. VIII, 



1839, p. 136. 

 Porcellana rupicola STIMPSON, Proc. Bost. Soc. Nat. Hist., Vol. VI, 1857, 



p. 85; Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 480, PI. XIX, 



fig. 2. BATE in Lord's Nat. in Vancouver's Is., Vol. II, 1866, p. 276. 

 Petrolisthes rupicolus STIMPSON, Proc. Acad. Nat. Sci. Phila., 1858, p. 227. 



LOCKINGTON, Ann. Nat. Hist. (5), Vol. II, 1878, p. 396. NEWCOMBE, 



Bull. Nat. Hist. Brit. Col., 1893, p, 30. 

 Petrolisthes cinctipes ORTMANN, Zool. Jahrb. Abth. f. Syst., Bd. X, 1897, 



p. 278. 



Carapace longer than wide, and quite distinctly areolated; the anterior 

 portion is roughened by minute prominences and the branchial regions 

 are transversely finely striated. Front triangular, depressed, blunt, trans- 

 versely concave above, with a rounded notch on either side of the base 

 next to the orbit. Antero-lateral margin marked by a raised line. Ocular 

 peduncles somewhat flattened; superior margin of the orbit slightly con- 

 cave. Antenna! peduncle granulated; the flagellum may exceed one and 

 one-half times the length of the carapace, and is furnished with a few 

 setse which are longer than the width of the joints. Ischium of the max- 

 illipeds finely rugose, the distal margin transverse and broadly rounded; 

 the outer border is prolonged into a lobe; the lobe on the inner side of the 

 merus is prominent and distally rounded. Chelipeds granulated above; 

 a small tooth at the antero-distal angle of the merus; carpus slightly 

 tapering towards the distal end; no teeth on the anterior margin but the 

 inner angle is prominent and evenly rounded; the posterior surface of the 

 carpus is rugose, the upper edges of the projecting rugae forming a rough 

 ridge along the posterior margin which terminates distally in a tooth; 

 hands strongly flattened, outer edge acute, nearly straight along the mid- 

 dle; tips of the fingers curved. Ambulatory legs more or less rugose, the 

 merus expanded and nude; propodi hairy and furnished with a few short 

 spinules near the distal end of the posterior margin; dactyls short, hairy, 

 curved, acute, and generally furnished with a few minute spines below. 

 The posterior pair of sutures in the telsou is oblique. 



Length, 20.5 mm; breadth, 19.75 mm. 



Vancouver's Island (Bate, Newcombe); Humboldt 

 County, Calif.! San Francisco Bay! Monterey! Santa 

 Barbara! Santa Catalina Island! San Diego! San Miguel 

 Island; west coast of Lower California and Gulf of Cali- 

 fornia (Lockington). 



