FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 369 



minal phalanges simple or T-shaped. Pupil circular. Tongue oval, 

 entire and free behind; one or two smooth or crenulate dermal ridges 

 across the palate in front of the pharynx. Digits with or without 

 terminal dilatations. Tadpoles with toes more fully webbed before 

 than after metamorphosis. 



Microhyla subnigra (Miranda-Ribeiro) 



Plate 33, Figures h-l 

 1920. Engystoma sub-nigrum Miranda-Ribeiro, 1920c, p. 285, pi. [1], pi. [2], 



fig. 7 (type locality, Serra de Maca6, Rio de Janeiro); 1926, pp. 183, 



225. 

 1934. Microhyla subnigra Parker, 1934a, p. 150. — Dunn, 1949, p. 17. 



Description. — Young frog, USNM 97718, Guapi, Teres6polis, Rio 

 de Janeiro. Snout very long, making an acute angle rounded at the 

 tip when viewed from above and in profile; upper jaw projecting 

 greatly beyond the lower; tongue large, over three-fourths the width 

 of mouth-opening, round and free posteriorly; lower jaw curiously 

 truncate in front, with thi'ee swollen areas, two lateral areas due to 

 the bony extensions of the mandible and a third (inner) area, to the 

 tongue attachment; nostrils lateral, their distance from end of snout 

 one-half their distance from eye, the interval between them equal to 

 their distance from eye; a deep furrow extends below the snout tip 

 between the nostrUs, nearly reaching the front of the upper lip, and 

 causing the tip of the snout to have a bulbous appearance; eye very 

 small, about one-third the snout length; canthus rostralis rounded, 

 merging with the nearly vertical loreal region, which is set off from 

 the upper lip by a distinct channel; upper eyelid narrow, about one- 

 fourth of the interorbital diameter. Body stout, in postaxUlary region 

 almost twice the head width; fingers short, free, with small but 

 distinct lateral dermal fringes, fourth much longer than second, 

 extending to base of penultimate phalanx of third; two large palmar 

 callosities; metacarpal tubercles not well developed. Toes free, with 

 dermal ridges, third longer than fifth, extending halfway on ante- 

 penultimate phalanx of fourth; a small inner but apparently no outer 

 metatarsal tubercle; no apparent tarsal ridge; the enlarged pads on 

 lower sides of toes poorly developed. ^Yhen hind leg is extended 

 forwards, heel reaches to shoulder; when limbs are laid along the 

 sides, knee and elbow are widely separated; when hind legs are bent 

 at right angles to the body, heels just touch. Skin smooth above 

 and below. 



Dimensions. — Head and body 19 mm.; head length 5.5 mm., width 

 5.5 mm.; femur 7 mm.; tibia 7.5 mm.; foot 8.5 mm.; hand 4 mm. 



Color.- — Dorsum pale wood brown, immaculate except for faint 

 traces of wide darker bars across the tibia; venter pale drab, with 

 indications of a lighter marbling on the belly and underside of legs. 



26200ft— 55 ^25 



