88 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



ent species. "Petrolisthes near cinctipes" listed by Schmitt (1939) 

 from Isla Socorro is very probably P. tonsorius also. 



The name tonsorius is a manuscript designation of Steve A. Glas- 

 sell, who first recognized the species as new, and whose untimely 

 death prevented his publishing its description. The scissors-like form 

 of the chela may have suggested to Mr. Glassell this Latin name, which 

 denotes "of, or belonging to, shearing or shaving." 



Range: Mainland from Cabo San Lucas, Gulf of California, south 

 to Punta Santa Elena, Ecuador; Revillagigedo, Cocos, and Galapagos 

 Islands. 



Petrolisthes cabrilloi Glassell 

 Plate 26, fig. 3 



IPetroHsthes rupicoius, Lockington, 1878, pp. 395, 396 (part). Not 



P. rupicoius (Stimpson) = P. cinctipes (Randall). 

 ^Petrolisthes cinctipes, Holmes, 1900, p. 107 (part). Not P. cinctipes 



(Randall). 

 Petrolisthes cinctipes, Baker, 1912, p. 102. Hilton, 1916, p. 72. Not 



P. cinctipes (Randall). 

 Petrolisthes cabrilloa Glassell, 1945, p. 225, text-fig. 4 (type locality, 



Anaheim Landing, California). 

 Petrolisthes sp., Hewatt, 1946, p. 200. 



Previous records: 



California. Morro Bay: S. A. Glassell (Glassell). Santa Cruz Island: 

 W. G. Hewatt and W. Williams (Hewatt). Point Dume; Topanga 

 Canyon; Sesquit Canyon: S. A. Glassell (Glassell). Malaga Cove, 

 Palos Verdes: Olga Hartman (Glassell). Anaheim Landing: W. 

 A. Kirk (Glassell). Corona del Mar: S. A. Glassell (Glassell). 

 Santa Catalina Island: (Holmes) [probably this species]. La- 

 guna Beach: (Baker). San Diego: (Holmes) [probably this spe- 

 cies] ; P. Rich (Glassell). 



Baja California. Approximately to Punta Banda: (Glassell). Isla 

 Asuncion: Fisher (Lockington) [probably this species]. 



Diagnosis: Carapace granular to nearly smooth; no epibranchial 

 spine; front triangular; carpus about twice as long as wide, proximal 

 one-fourth of anterior margin with a small lobe, margins otherwise 

 subparallel ; outer margin of manus with a thin edge ; merus of walk- 

 ing legs unarmed. 



