FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 289 



tips dilated into disks twice the width of terminal phalanx, with a pair 

 of distinct pads separated by a median longitudinal furrow on top of each 

 disk, even the first; fourth finger considerably longer than second, which 

 reaches only to base of penultimate phalanx of third; first and second 

 fingers nearly equal, or first slightly shorter than second; no pro- 

 nounced pollex, but a wide, low palmar tubercle and one on outer side 

 of first finger; toes with slight traces of a web between all except the 

 outer two; disks of toes like those of fingers and similar in size; fifth 

 toe shorter than third, which extends midway on antepenultimate 

 phalanx of fourth; a small but sharp oval inner metatarsal tubercle 

 and a smaller round outer one; subarticular tubercles of fingers and 

 toes small, single, inconspicuous; a very distinct dermal fold along 

 inside of tarsus but no fringes on fingers and toes (in this specimen) ; 

 when leg is straightened, a heavy skinfold appears at heel and knee. 

 Body stoutly built, in postaxillary region a little wider than head; 

 when hind leg is adpressed, heel reaches to nostril; when limbs are laid 

 along the sides, knee and elbow considerably overlap; when hind legs 

 are bent at right angles to body, heels overlap. Skin of upper parts 

 minutely glandular, with small flat tubercles appearing above the ear 

 and on the dorsolateral regions, and becoming more prominent before 

 the groin and tending somewhat to a definite lateral line arrangement; 

 posterior thighs and postanal region covered with small granules; 

 ventral surfaces smooth; a narrow, low glandular line encircling upper 

 tympanic border and ending behind it on the shoulder. (The male 

 has a pair of small external vocal sacs below the outer corner of the 

 lower lip; otherwise the sexes look alike.) 



Dimensions. — Head and body 38 mm.; head length 14 mm., width 

 13 mm.; femur 18.5 mm.; tibia 20 mm.; foot 17.5 mm.; hand 11.5 mm. 



Color in alcohol. — Ground color above dark olive, lightening to drab 

 on the limbs; a broken seal-brown crossband betAveen the eyes, with a 

 light spot in front of and behind it on either eyelid; an irregular dark 

 brown spot on top of the snout; back with very indistinct dark suffu- 

 sions and a few small light spots; the enlarged tubercles on the side in 

 front of the groin white (yellowish in life) ; upper part of femur, tibia, 

 and outer tarsus with wide symmetrical sepia crossbars; posterior 

 femur with very fine gray vermiculations on a drab ground; a dark 

 diagonal bar on the front of the forearm; upper arm with indistinct 

 crossbars and fine reticulations; ventral surfaces pale drab gray Avith 

 slight suffusions of darker reticulations all over, especially on lower 

 thighs. 



Variations. — In other adult individuals from the vicinity of the 

 city of Rio de Janeiro the canthus rostralis is sharp, while the nostril 

 is often a little nearer to the tip of the snout, about two-thirds the dis- 

 tance from the eye, instead of midway, as in the described specimen. 



While the specimen described lacks the membranous fringes along 



262006—55 20 



