FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 



209 



longer than the second, reaching halfway on disk of third which covers 

 about four-fifths the tympanic area; no apparent dermal ridges along 

 inner or outer forearm ; a rudiment of a pollex showing only as a blunt, 

 coarse enlargement of base of first finger; toes slightly more than 

 one-half webbed, third and fifth subequal, disk of fourth covering 

 nearly one-half the tympanic area; a long, blunt, inner and a small, 

 wartlike, almost invisible outer metatarsal tubercle; no dermal ridges 

 on tarsus; a transverse skinfold below heel, but no glandular ridges 

 on it. Body elongate but very heavily built, in postaxiUary region as 

 wide as greatest diameter of head; when hind leg is adpressed, heel 

 reaches to posterior corner of eye ; when limbs are laid along the body, 



Figure 19. — Trachycephalus nigromaculatus, USNM 98538: a, Dorsum X ^; i, profile X 

 %\c, foot X 1; d, hand X 1. 



knee and elbow are widely separated; when hind legs are bent at right 

 angles to body, heels very slightly overlap. Head bony and like fine 

 sandpaper to the touch, especially in occipital region; a long, raised 

 crest bordering the upper part of ear; skin of back and upper limb 

 surfaces thick and finely glandular, with a few larger tubercles scattered 

 on the back; a wide low glandular ridge from bony crest above ear 

 backwards to above axilla; skin of throat coarsely granular, that of 

 chest fairly smooth, that of belly and lower surface of femur very 

 heavily granular. No skinfold across the chest; a pair of very promi- 

 nent lateral vocal sacs extending out below the supratympanic fold 

 behind the ear. A heavy callosity on base of first finger. 



Dimensions. — Head and body 86 mm.; head length 24 mm., width 

 26 mm.; femur 34 mm.; tibia 36 mm.; foot 30 mm.; hand 23 mm. 



262006—55 -15 



