Occasional Papers of the Museum of Zoology 3 



mens were caught in such situations. It would seem that Hyla 

 uranocliroa might well be an approach towards the two more 

 specialized genera in eye color and in habits, while in form of 

 pupil and character of hand still a technical Hyla. 



The tadpoles of this species were the first to be assigned 

 correctly to their adults, on account of the red eyes, which 

 were a prominent feature of both stages. They were ven- 

 common in the stream and possessed well developed power of 

 suction. We often lifted them from the water clinging to our 

 hands in this way. They were occasionally observed clinging 

 to rocks or to the surface film. 



Diagnostic characters of mature tadpole: Spiracle sinistral, 

 anus dextral, eyes visible from ventral surface, upper fin crest 

 not extending to anus, Sfjiracle halfway between snout and 

 base of hind limb, labial teeth 2/3, uniform brown, eyes red, 

 greatest length 45 mm., smallest seen 16 mm. 



Description of mature tadpole: Length of body contained 

 three times in total length; width of body 1.75 times in its 

 own length; nostril nearer to eye than to snout; eye dorso- 

 lateral, visible from ventral surface, equidistant from snout 

 and from spiracle; distance between nostrils = interorbital 

 width = width of mouth ; spiracle sinistral, equidistant from 

 snout and from base of hind legs; anus dextral; depth of the 

 muscular portion of tail at base 1.2 in greatest depth of tail. 



Upper labium with two equal uninterrupted rows of teeth ; 

 lower labium with three continuous rows, inner two equal, 

 outer about i/o as long as median ; a complete lip around the 

 mouth. 



General color, uniform brown; crests of tail unpigmented 

 save for a few spots on the dorsal portion. Total length 43 

 mm., tail 30 mm. 



Hyln alhomarginata Spix 



A foamy mass of eggs was found under a rock in the small 

 stream. As this was the situation from which Hy?a alhomar- 

 ginata was calling, it is quite possible, by association and by 

 elimination of the other three species whose tadpoles inhabited 

 the stream, that these were the eggs of this animal. 



