64 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



Remarks: Except for a single record, Petrolisthes nigrunguiculatus 

 has been taken only in the Gulf of California. A specimen in the col- 

 lections of the Hancock Foundation bears station number 418-35, which 

 refers to Puerto Utria, Colombia. This specimen does not differ in 

 any respect from Gulf of California material. The fact that it was re- 

 covered from a sponge suggests that the species should be looked for 

 under similar conditions in intervening territory. On the other hand, 

 there is a possibility that the wrong station number was placed with the 

 specimen; until further material from south of the Gulf of California 

 is recovered, the Colombian record should be accepted with caution. 



Range: Gulf of California, from Isla Angel de la Guarda south to 

 Cabo San Lucas. Extralimital : Puerto Utria, Colombia. 



Petrolisthes tuberculatus (Guerin) 

 Plate 24, fig. 2; text-fig. 3(1) 



Porcellana tuberculata Guerin, 1835, p. 116 (type locality, Chile); 

 1838b, p. 7, pi. VII 26, fig. 2 (type locality restricted to Val- 

 paraiso) ; 1839, p. 175, pi. 52, fig. 2. H. Milne Edwards and 

 Lucas, 1844, p. 34. Dana, 1852, p. 422. Cunningham, 1871, p. 

 495. 



Porcellana lobifrons H. Milne Edwards, 1837, p. 256 (type locality, 

 shores of Chile). 



Porcellana tuberculifrons, Nicolet, 1849, p. 193 (error for tuberculata) 



Petrolisthes tuberculatus, Stimpson, 1858, p. 227. Targioni-Tozzetti 

 1872a, p. 399; 1872b, p. 471; 1877, p. 216, pi. 13, figs. 3, 3a-f 

 Cano, 1889, pp. 96, 99, 258. Ortmann, 1897, p. 290. Lenz, 1902, p 

 746. Porter, 1903, p. 151. Rathbun, 1910, p. 600. Haig, 1955, pp 

 43, 50. 



Previous records: 



Peru. San Lorenzo: U. S. Expl. Exped. (Dana). 



Chile. "Chile": (Guerin 1835) ; (H. Milne Edwards). Caleta Buena: 

 R. Paessler (Haig). Iquique: F. Beumer (Haig). Iquique; Ca- 

 vancha; Tocopilla: Lund Univ. Chile Exped. (Haig). Taltal: R. 

 Paessler (Haig). Coquimbo: Nassau (Cunningham) ; L. H. Plate 

 (Lenz). Peninsula Coquimbo; Bahia Herradura de Guayacan: 

 Lund Univ. Chile Exped. (Haig). Herradura: F. T. Delfin 

 (Porter). Montemar: Lund Univ. Chile Exped. (Haig). Val- 

 paraiso: Favorite (Guerin 1838b); U. S. Expl. Exped. (Dana); 

 Magenta (Targioni-Tozzetti); Vettor Pisani (Cano). San An- 



