MEXICAN TAILLESS AMPHIBIANS 



215 



3.5 mm.; transverse diameter of eye, 8.4 mm.; anterior edge of eye 

 to nostrU, 6.2 mm.; the hind limb being carried forward along the 

 body, the tibio-tarsal joint reaches to end of snout; vomerine teeth 

 within and behind level of posterior margins of the choanae; a large 

 elongate internal metatarsal tubercle; no dorso-lateral glandular 

 dermal fold; a feeble, curved glandular fold from eye to shoulder; 

 upperparts, including top of head, grayish (in alcohol) with numerous 

 small black spots or dots; skin on back pustulose on one cotype; 

 throat and limbs heavily mottled with brownish; abdomen white. 



Two cotypes: B.M. Nos. 1914. 1. 28. 148-149; Barranca del Cobre, 

 Sierra Tarahumare, altitude 3,000 feet; Dr. Hans Gadow, collector. 

 Largest individual: Head-and-body length, 61.3 mm.; transverse 

 diameter of tympanum, 3.7 mm.; transverse diameter of eye, 7.7 

 mm.; anterior edge of eye to nostril, 4.8 mm.; the hind limb being 

 carried forward along the body, the tibio-tarsal joint reaches to barely 

 beyond the nostril; a distinct tarsal fold; elongate internal metatarsal 

 tubercle, but no outer one; vomerine teeth in two small clusters 

 mostly behind, but within level of choanae; no dorso-lateral glandular 

 dermal fold; upperparts olive brown, marked with black spots with 

 light centers; black spots on upperparts tend toward a linear arrange- 

 ment; black crossbars on upper surfaces of thigh, tibia, and tarsus, 

 and outer surface of foot; dark crossbars on forearm. 



Boulenger erred when he stated that this species lacked a tarsal 

 fold. This fold is quite distinct on one of the larger cotypes, but is 

 less sharply defined on some of the smaller ones. 



Specimens examined. — Six, as follows: 



Rana tarahumarae 



' Cotypes. 



