MEXICAN TAILLESS AMPHIBIANS 65 



description of Bujo simus. These individuals have body lengths 

 ranging from 22 mm. to 29 mm. A small indistinctly outlined tym- 

 panum, which was covered with minute tubercles, was recognized on 

 five of these young toads. On the remaining five, the tympanum was 

 entirely concealed by numerous closely spaced tubercles. On all, the 

 skin of the underparts is seen on close inspection to be distinctly 

 granular. Nevertheless the smaller individuals have a much smoother 

 and a much more delicate skin on the underparts than have older 

 individuals. A rather casual examination of such individuals might 

 possibly have led Schmidt to infer that the skin on the underparts was 

 nearly smooth. Giinther,^^ however, states that the British Museum 

 of Natural History received through Doctor Werner one of the cotypes 

 of Schmidt's Bufo simus. This specimen (B. M. No. 98. 9.14. 6) has 

 a tarsal fold, and the tympanum is concealed by the tubercular 

 skin. The head and body length is 15 mm. Although it is a very 

 young toad, the coloration of the upperparts, especially the light areas, 

 the sides, and the upper lip, corresponds rather closely with the type 

 of color pattern most commonly observed in Mexican specimens. The 

 skin on the abdomen is distinctly granulated. 



The cotypes of Bui'o intermedius (B. M. Nos. 58. 9. 20. 3-6) were 

 collected in 1857 by Louis Fraser, a bird collector employed by Dr. 

 P. L. Sclater, and are labeled as coming from Guayaquil and the Andes 

 of Ecuador. Although the Andes locality is not stated, it is known 

 that Fraser was collecting at Gualaquiza and at Zamora in the eastern 

 wooded region along the Rio S. lago and on the eastern slope of the 

 watershed at Cuenca, which is situated at an altitude of 8,200 feet on 

 the Rio Matadero. Two of the cotypes have the type of coloration 

 that is commonly present in Mexican specimens, one has prominent 

 black spots on the light ground color of the upperparts, and the other 

 has the color pattern somewhat obliterated by a darker suffusion. 

 In addition, the parotoid glands come in contact with the postorbital 

 cranial crests, the parietal crests are short, the subarticular tubercles 

 OjI distal phalanges of the fourth toe are double, and a linear series 

 of small tubercles extends along the tarsal fold. The measurements 

 of these four cotypes are, respectively: Head-and-body length, 90.4, 

 88, 76.4, and 76.7 mm.; transverse diameter of tympanum, 3.8, 3.1, 

 3.7, and 3.2 mm.; transverse diameter of orbit, 8.5, 8.8, 8.1, and 6.9 

 mm.; distance between anterior rim of eye and nostril, 6.3, 5.8, 5.0, 

 and 4.3 mm. The specimen figured and described by Giinther bears 

 a very close resemblance to the toad that occurs in Mexico, and there 

 are no known characters that will separate the former from the latter. 

 Camerano merely published De Filippi's manuscript name, Bvfo occi- 

 dentalis, in the synonymy of Bufo intermedius, and it is strictly a 

 nomen nudum. 



>• Gunther, A. C. L. G., Biologia Centrali-Amerieana, Reptilia and Batracliia, pp. 2.')4, 255, May, 1901. 



