74 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



Remarks: Thanks to collecting activities of personnel from the Han- 

 cock Foundation's vessel Velero IV, the range of Petrolisthes rathbunae 

 is extended to Isla Guadalupe, Baja California. Although Isla Guada- 

 lupe is known to have a rather high percentage of endemism in its 

 fauna, no differences could be found betveeen specimens of P. rath- 

 bunae from that island and those from California. This species is the 

 first porcellanid to be reported from Isla Guadalupe. 



Range: California mainland, from Monterey Bay south to Laguna 

 Beach; Santa Rosa, Santa Cruz, Santa Catalina, San Clemente, 

 and Guadalupe Islands. 



Petrolisthes eriomerus Stimpson 

 Plate 26, fig. 4 



Worcellana eupicola, Spence Bate, 1866, p. 277. Not P. rupicola Stimp- 

 son = Petrolisthes cinctipes (Randall). 



Petrolisthes eriomerus Stimpson, 1871, p. 119 (type locality, Mendo- 

 cino, California). Lockington, 1878, pp. 395, 397. Holmes, 1900, 

 p. 108, pi. 1, fig. 15. Rathbun, 1904, p. 168. Way, 1917, p. 350, 

 pi. 80, fig. 4. Schmitt, 1921, p. 180 (part), pi. 23, fig. 2; text-fig. 

 114. Johnson and Snook, 1927, p. 351, text-fig. 299. G. M. 

 Smith, 1928, p. 164. Hart, 1930, p. 105; 1940, p. 89; 1953, p. 

 140. Clemens, 1933, p. 50. Glassell, 1938a, p. 443; 1945, p. 224. 

 Ricketts and Calvin, 1939, p. 171 (part). Rigg and Miller, 1949, 

 p. 343. Light, 1954, pp. 183, 186. Not Boone, 1931, p. 154, text- 

 fig. 8; 1932, p. 52, text-fig. 16. Probably not Hilton, 1916, p. 72. 



Petrolisthes rupicolus, Newcombe, 1893, p. 30 (part). 



^Petrolisthes cinctipes, Caiman, 1898, p. 260. Lenz, 1901, p. 451 (part). 

 Taylor, 1912, pp. 191, 208. 



Previous records: 

 British Columbia. Langara Island, Queen Charlotte Islands: (Hart 

 1953). Flamingo Inlet and W side Louscoone Bay, Queen Char- 

 lotte Islands: C. M. Fraser (Hart 1940). West coast Vancouver 

 Island: Esperanza Inlet; Nootka Sound; Clayoquot Sound: E. G. 

 Hart (Hart 1940). East coast Vancouver Island: Strait of Georgia; 

 Baynes Sound near Comox: C. F. Newcombe (Newcombe) 

 [probably this species]. Nanaimo: G. W. Taylor (Taylor) [prob- 

 ably this species]. Ross Bay: (Hart 1930). Near Sidney: G. M. 

 Smith (Smith). Victoria: C. F. Newcombe (Newcombe) [probably 

 this species]. Esquimault Harbor: J. K. Lord (Spence Bate) [prob- 



