THE CANCROID CRABS OF AMERICA 505 



Diagnosis. — Width of carapace (exclusive of spines) lYs or less than 

 Iji times length. Antero-lateral spines 4, equally separated. A 

 slender, well-marked, subhepatic spine, below the interval between 

 first and second lateral spines. In both sexes less than half of outer 

 surface of major palm is smooth. A continuous low of short, conical 

 spines runs lengthwise in line with the base of cutting edge of propodal 

 finger. 



Description. — General appearance same as that of P. spinohirsutus . 

 The frontal spines are longer than in spinohirsutus; the other differ- 

 ences are indicated in the diagnosis. 



Measurements. — Female holotype, length of carapace including spine 



14.2, median length 13.8, width including spines 21.4, excluding spines 



18.3, fronto-orbital width 14.7, width of front including antennal 

 spine 6.6 mm. 



Range. — West coast of Mexico, from Magdalena Bay to Manzanillo, 

 via Gulf of California. ? Galapagos Islands. 



Material examined. — 



WEST COAST OF LOWER CALIFORNIA.— Off Magdalena 

 Bay; lat. 24° 38' 00" N.; long. 112° 17' 30" W.; 51 fathoms; gn. M.; 

 temperature 56.4° F.; May 2, 1888; station 2S32, Albatross; 1 young, 

 soft shell (21988); width 4.3 mm., identification uncertain. 



Magdalena Bay; Sail Rock, Entrada Point, S. 53° W.; Redondo 

 Pomt, S. 15° W.; lat. 24° 35' 20" N.; long. 111° 59' 35" W.; 13.5 

 fathoms; S. brk. Sh.; March 21, 1911; station 5678, Albatross; 1 male, 

 1 female (60038). 



GULF OF CALIFORNIA.— Head of Concepcion Bay, April 6, 

 1911; Albatross; 1 male, 3 young (60036). 



San Luis Gonzales Bay; March 27, 1889; Albatross; 1 male (17414). 



Off Shoal Point; lat. 31° 31' 45" N.; long. 114° 19' 00" W.; 10 

 fathoms; gy. s.; March 26, 1889; station 3027, Albatross; 1 young 

 (18621). 



Off Adair Bay; March 25, 1889; Albatross: Lat. 31° 22' 00" N. 

 long. 114° 07' 45" W.; 17 fathoms; G. brk. Sh.; temperature 65.2° F. 

 station 3026; 2 females (1 is holotype) (17413). Lat. 31° 21' 00" N. 

 long. 113° 49' 00" W.; 11 fathoms; S. brk. Sh. G.; temperature 67° F. 

 station 3024; 4 males, 2 females (17412). 



NW. of Guaymas; lat. 28° 16' 00" N.; long. 111° 54' 00" W.; 22 

 fathoms; fne. gy. S.; temperature 63° F.; March 23, 1889; station 

 3012; Albatross; 1 male (18199). 



STATE OF COLIM A. —Manzanillo; on drifted pile; July 17, 1913; 

 C. R. Orcutt; 5 females (46081). 



PILUMNUS GONZALENSIS Rathbun 



Plate 204, Figures 3 and 4 



Pilumnus gonzalensis Rathbun, Proc. U. S. Nat. Mus., vol. 16, 1893, p. 240 

 (type-locality, San Luis Gonzales Bay; type, Cat. No. 17415, U.S.N.M.). 



