FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 347 



eyes, a nearly vertical fold from the posterior comer of eye across 

 tympanic region nearly to shoulder; ventral surfaces smooth except 

 for the minutely granular postanal region extending onto most of 

 the posterior femur; a distinct large ventral disk surrounded by a 

 large skinfold coming from the armpits and crossing the belly a little 

 distance in front of the groin. Apparently a slight external vocal 

 sac extending across the tliroat. 



Dimensions. — Head and body 32.5 mm.; head length 9.5 mm., 

 width 12 mm.; femur 13.5 mm.; tibia 13 mm.; foot 15 mm.; hand 9 mm. 



Color in alcohol. — Dorsal ground color pale olive-gray; a marbled 

 pattern of slate-gray, black-edged, sinuous, irregular spots rather 

 evenly distributed over the entire dorsal surface, a V-shaped darker 

 mark between the eyes only slightly emphasized; a darker horseshoe- 

 shaped marking on anterior part of back, and a diagonal, irregular 

 posterolateral spot partly covering the inguinal gland; many other 

 irregular smaller or larger spots between and around these; upper 

 surface of legs and feet with black-edged, gray, elliptical, diagonal 

 crossbars, the middle one on the tibia considerably widened; fore 

 limbs with irregular slate-gray marblLngs; upper lip with three or 

 four squarish gray spots separated by light spaces; the postocular 

 region covered with an irregular slate-gray area, but without any 

 trace of a definite lateral stripe; ventral surfaces pale olive-buff, 

 immaculate except for a few small gray spots across the throat and 

 along the edge of the lower jaw; tips of toes, first finger, and meta- 

 carpal tubercles seal brown, the cutting edge of the metatarsal tuber- 

 cles black. 



Variations. — The pattern is remarkably constant, considering the 

 fact that highly marbled designs seem to vary more than linear or 

 other patterns. The interorbital bar appears more prominent in the 

 specimens where the spots are less crowded towards the head region. 

 The most prominent dorsal marking, horseshoe-shaped or Q-shaped 

 at times, is invariably present in the specimens at hand, and in 

 several of them the center area of this spot is lighter than the sur- 

 rounding ground color. The postocular region may be covered with 

 a patch of fah'ly uniform gray color, or by some darker more or less 

 vertical vermiculations, but never by a longitudinal dark stripe. The 

 inguinal disk, very large in all the specimens (projecting in a 

 ridge from the siurounding skin in one individual hardened too much 

 in strong alcohol), is not set off by any special marking at all, but may 

 be striped or spotted as the vermiculations extend over it from the 

 surrounding area. The throat appears neai'ly inmiaculate in most 

 of the specimens; in only two or three are there suggestions of gray 

 spots as in the described specimen. 



The hind legs are short in all, the adpressed heel never extending 



