FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 163 



surfaces of hands and feet deep wax yellow, the disks saffron below. 

 Iris light prune purple, with a very fine network of dark lines going 

 through it; an indigo band surrounding it; pupil black, nearly round 

 to transversely elongate. Dr. A. Lutz informed me that in life the 

 eyes are very prominent, and that the pupil is transversely elongate 

 and the iris distinctly copper-colored, with fine dark veinlike marks. 



Variations. — The heel carried forward may reach between the pos- 

 terior border of the eye to the nostril. The heel appendage is distinct 

 in some frogs, but may be small or even tuberclelike in others. 

 The coarse postanal granules are occasionally arranged in a transverse 

 row, as they frequently are in H. albosignata. 



Remarks. — The very loose skin of the trunk may fall into a fold in 

 the sitting position. This fold is not permanent, disappearing when 

 the frog is stretched to its full length. 



Some elevated white lines are prominent upon the external part of 

 the forearm, hand, tarsus, and foot, as well as on the can thus rostrahs. 

 The decorative spots which occur on lateral parts covered during 

 repose in many frogs are absent in H. albofrenata. There is no indi- 

 cation of dark crossbars on the extremities. The general color is 

 bright grass green turning to yellowish on the Hmbs, throat and 

 belly. The green color during life is quite constant, but disappears 

 in preserved specimens, changing to ivory white which may be dotted 

 with dark spots. In Hfe the very transparent tissues allow the green 

 bones to show through the flesh; the viscera, with a whitish spot 

 formed by the tendinous peritoneum, may be indistinctly seen. The 

 iris is characterized by a coppery red tone. 



In yoimg examples the tjnmpanum is not distinctive in color, hence 

 not apparent. In adults the tympanum is more distinct, but does 

 not contrast with the surrounding skin. The vomerine teeth, faint 

 in the young, become distinct in the adult. 



The tadpoles reach a length of more than 5 cm., of which two- 

 thirds is tail, which is not broad but very long. The lower membrane 

 on the tail reaches almost to the body, but the upper is shorter. 

 The tip is quite rounded. The tadpole is dark at first, but, as meta- 

 morphosis begins, light spots appear in the caudal region, sides, and 

 back. These increase, and gradually the tadpole becomes a very 

 hght green, the tail remaining dark. 



This frog in the adult stage rarely appears, notwithstanding the 

 frequency with which one meets young ones and tadpoles in water, 

 still or running. The adults habitually hide in vegetation above the 

 ground and are protected by the uniform green color of the exposed 

 parts. Their song suggests the sound of water dripping into an 

 empty bottle. 



