FROGS OF SOUTHEASTERN BRAZIL COCHRAN 43 



GofAs: Jaragud, MP 2028, September 1934. 



Rio de Janeiro: Colomi near Teres6polis, USNM 97729, Sandig, Apr. 10, 1935. 



Guapi near Teres6polis, USNM 97710-6, Sandig, March- April 1935; 



NMS (2), P. Giesler. 

 Sao Paulo: Alto da Serra, MRHN IG 9308 Reg. 37, Massart, September 1922. 

 BOLIVIA: Guajard-Mirim, USNM 123963, Gilmore. RJo Guapor6, CM 2510, 



Haseman, July 18, 1909. 

 BRITISH GUIANA: Kartabo, NYZS 2919-20, 3001, 3066, 3074, 3087 and 3192, 



Beebe. Maroni River, USNM 108987, Mjoberg. 

 COLOMBIA: Alto Rio V/aupes, AMNH 514. Dari^n, USNM 4337, Schott. 



Isthmus of Dari6n, MRHN IG 4544 Reg. 37g. La Esperanza, MRHN IG 



12175. Quebrada Santa Ana, USNM 124266, Brady. Regeneraci6n, 



USNM 127856-62, Carriker. 

 ECUADOR: Andoas, Rio Pastaza, MRHN IG 11698, Olalla, Oct. 5-9, 1934. 



Macas, El Oriente, USNM 101827-30, Madeira, December 1922. Mirador, 



AMNH 38518, 38523, 38526, 38528, Tate, February 1924. Plaza de Oro, 



USNM 20593-7, M. B. Kerr, January-February 1893. 

 PERtJ: Orellana, near Campo Santa Clara, USNM 127144-6, 127149-56, 127934- 



6, Rozanski. Rio Huacamayo, MRHN IG Reg. 31 g. 

 VENEZUELA: Cerro Yapacana, USNM 83949, Holt, Apr. 24, 1931. El Lim6n, 



D. F., USNM 121173-4, Boswell. 



Family Centrolenidae 



This group of frogs, for the most part of diminutive size, may be 

 characterized as follows: Ultimate phalanges T-shaped, with an 

 intercalated cartilage between the penultimate and the ultimate 

 phalanges; sacral diapophyses more or less broadly expanded; the 

 astragalus and calcaneum fused into a single slender bone; pectoral 

 girdle arciferal; coccyx articulating by a double condyle; eight procoe- 

 lous, presacral vertebrae; no omosternum. 



Many of the species of this famUy are known in life to be green 

 on the dorsal and exposed surfaces. On the ventral and concealed 

 surfaces they are often transparent flesh color or sometimes yellowish 

 or whitish. In preservation they are no longer transparent, the green 

 color is lost, and pigment is present in large or small chromatophores, 

 lavender or purplish in color and more or less equally distributed. 

 Occasionally the dorsum is decorated with small deep purple punc- 

 tations, or ^vith small rounded white or cream spots. The lavender 

 or purple pigments are probably not visible in life; the cream marks 

 may appear on the green background of the living frogs. 



The known range of this family extends from the States of Veracruz 

 and Guerrero in Mexico to southeastern Brazil. 



The fact that numerous related species having the above characters 

 form a group worthy of family rank was noted by Dr. Edward H. 

 Taylor (1951) in his study of the Costa Rican amphibians. He has 

 likewise proposed the generic name Cochranella for species formerly 



