FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 105 



border of the tympanum and ending above the shoulder; skin of throat 

 and chest entirely smooth, that of belly coarsely granular, that of 

 posterior femur and anal region nearly smooth or slightly glandular. 

 A slight skinfold across the chest. (A pair of rather small lateral 

 external vocal sacs in the male.) 



Dimensions. — Head and body 19 mm.; head length 7 mm., width 

 7 mm,; femur 9 mm.; tibia 10 mm.; foot 7.5 mm.; hand 5 mm. 



Color in alcohol. — The cotype described is badly faded to a uniform 

 pale drab, with no markings visible except a pale brown stripe begin- 

 ning on the snout, continuing along the loreal region and across the 

 tympanum, and fading out on the sides halfway to the gi-oin. Traces 

 of a wide pale stripe dorsal to this are faintly apparent, and a light tri- 

 angular area covering the snout anterior to the eyes. Very faint 

 traces of dark narrow crossbars are to be seen on the tibia. The 

 ventral surface appears immaculate. The eggs retained within the 

 body give the abdomen a dark hue. 



Color in life. — The following color notes were taken on seven speci- 

 mens kept alive from the collection made at Recreio dos Bandeirantes : 

 Back ochraceous-rufous, ochraceous, or clay color to golden metallic 

 citron yellow. The dark-backed ones have a f^-shaped golden-yellow 

 stripe from snout and along dorsolateral line. A few were almost 

 chestnut behind the light triangle on snout. The chestnut color was 

 found also on the sides. Throat and lower part of sides, disks of toes, 

 lower tibia, and femur pale sulphur to primrose yellow. Anterior 

 part of belly opaque white. Posterior part of belly translucent 

 vinaceous-buff to darker. Anal region and outer margins of limbs 

 (in sitting position) with large metallic gold spots. Iris metallic- 

 vinaceous next to pupil, darker vinaceous-rufous mixed with coppery 

 and gray spots toward periphery. 



Variations. — In this species the variation in the vomerine teeth is 

 most interesting. Of all frog characters, the presence or absence of 

 vomerine teeth has been considered one of the most stable, but here 

 we have fluctuations from complete toothlessness to the possession of 

 two very distinct patches. In neither the cotype USNM 96194, from 

 Bom Successo, nor USNM 96150, from Manguinhos, can any vomerine 

 teeth be made out, although the bone which usually holds them is 

 barely perceptible. This ridge without definite teeth is quite apparent 

 in the mouth of USNM 97642 from Sacco Sao Francisco. Three 

 topot3T)es, USNM 96151-3, from near the Instituto Oswaldo Cruz, 

 at Mangimhos, have rather weakly developed patches of small teeth. 

 But the series of 9 frogs, USNM 97578-86, from Recreio dos Bandeir- 

 antes, is truly remarkable. In these specimens, aU taken on neighbor- 

 ing clumps of bukushes not 50 feet apart in a swamp, six individuals 

 have very strongly apparent sets of posteriorly converging, well 



