FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 



125 



than width of the opaque upper eyeUd, equal to distance between 

 nostrils. Tympanum rather indistinct, small, about one-third the 

 diameter of eye, separated from eye by an interval nearly equal to its 

 own diameter. Fingers webbed only at the base, fourth much longer 

 than second, reaching to disk of third which apparently covers the 

 tympanic area; no rudiment of a pollex visible; toes one-half webbed, 

 third and fifth subequai, disk of fourth apparently nearly covering the 

 tympanic area; an elongate inner metatarsal tubercle on the side of 

 the foot, but no outer one; inner tarsal ridge extremely weak, outer 

 apparently absent; a heavy skinfold across the heel, but no true 



Figure U.—Hyla nana, USNM 98131: a, Dorsum; b, profile; c, foot; d, hand; all X 2}^. 



dermal appendage; body elongate, in postaxillary region about equal 

 to greatest width of head; w^hen hind leg is adpressed, heel reaches to 

 tympanum; when limbs are laid along the side, knee and elbow are 

 widely separated; when hind legs are bent at right angles to the body, 

 heels overlap. Skin of upper parts smooth; scarcely a trace of a 

 supratympanic ridge; skin of throat and chest smooth, that of belly 

 and postanal region finely granular, that of remainder of lower femur 

 smooth. A heavy skinfold across the chest. An extremely large, 

 longitudinally wrinkled, median, external gular sac, projecting from 

 arc-shaped diverging skinfolds behind and more or less parallel to the 

 lower jawbones, these folds branching posteriorly and ending at the 

 shoulder. 



