FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 247 



spines on outer side of first finger; toes scarcely webbed at tbe base, 

 their disks small but better developed than those of fingers, having 

 the two pads and furrow well visible; third toe much longer than fifth, 

 reaching to base of penultimate phalanx of fourth; a sharp oval inner 

 and a smaller rounded outer metatarsal tubercle; a wide dermal fold 

 along inside of tarsus; body very stoutly built, in postaxillary region 

 somewhat narrower than greatest width of head; when hind leg is 

 adpressed, heel reaches to posterior corner of eye; when limbs are laid 

 along the body, Imee and elbow overlap; when hind legs are bent at 

 right angles to body, heels just fail to meet. Sldn of upper parts with 

 short low glandular longitudinal swelhngs, a more prominent one from 

 the posterior corner of the eyes diagonally directed towards the middle 

 of the back and another making a fairly continuous chain of dorso- 

 lateral glandules, and another on the side from above the aim midway 

 to groin; a few low tubercles on sacral region and below the dorsolateral 

 glands; a slight ridge above tympanum, widening behind it and 

 descending onto the shoulder where it ends in a slight swelling, with 

 another gland in front of it at the corner of the mouth; ventral surface 

 smooth except for a few postanal granules. No external vocal sacs, 

 but forearm and upper arm greatly enlarged. 



Dimensions. —Kesid and body 28 mm.; head length 9 mm., width 

 10 mm.; femur 13 mm. ; tibia 13 mm.; foot 13 mm.; hand 7 mm. 



Color in alcohol. — This specimen has now faded to an almost uniform 

 cinnamon above, drab below. A faint, V-shaped, dark dorsal patch 

 outlined with dark may be made out, its arms extending onto the 

 posterior coruers of the eyefids, and a faint fine apparently extends 

 above the tympanum. 



Color in life. —Its living coloration was noted in the original descrip- 

 tion of C. dispar by Dr. A. Lutz (1925a),' while its color pattern, to- 

 gether with that of the female, is shown on the plate accompanying 

 his (1931) description of C. fuscigula. 



Variations.— In two additional cotypes of C. dispar, USNM 96738 

 and 96740, the vomerine ridge is equipped with small, irregular teeth 

 for most of its'^length. The circlet of black-tipped tubercles around 

 the upper lip occurs in 96740, apparently a male. Among six topo- 

 types the condition of the vomerine ridge is variable from serrate and 

 toothed to smooth and scarcely perceptible. Dermal fringes on the 

 toes may be well developed or lacking. The head and limb propor- 

 tions are the same as those of gaudichaudii, while variation in other 

 features is similar in extent to the latter. 



The most apparent structural differences between male and female 

 are the blunt snout and swollen head of the former, together with its 

 greatly thickened forearm. The pattern of the male appears also to be 

 less distinct, due to the darker ground color of the dorsum. 



