292 U. S. NATIONAL MUSEUM BULLETIN 206 



Canthus rostralis prominent but rounded, the loreal region concave 

 and slanting outwards to the flaring upper lip border. Eye very- 

 large and prominent, its diameter equal to its distance from end of 

 snout; interorbital diameter equal to width of upper eyelid, equal to 

 distance between nostrils. Tympanum very distinct, one-half the 

 width of the eye, separated from eye by an interval less than one-third 

 its own diameter. Fingers free but with slight lateral dermal ridges, 

 their tips distinctly enlarged but truncate so that the terminal phalanx 

 is almost triangular, not grooved; fourth finger much longer than 

 second, which reaches to base of penultimate phalanx of third; first 

 finger very short, its terminal phalanx in preservative bent at right 

 angles to second, which bears a conspicuous round swelling beset with 

 very numerous minute horny black tubercles; a similar but smaller 

 patch of tubercles on the swollen basal callosity; subarticular and 

 palmar tubercles well developed; toes without webs but with slight 

 lateral ridges, their disks smaller than those of fingers and more 

 rounded, third longer than fifth, reaching halfway on antepenultimate 

 phalanx of fourth; a prominent oval imier and a small round outer 

 metatarsal tubercle; tarsal ridge not apparent. Body moderately 

 slender, in postaxillary region narrower than greatest width of head; 

 when hind leg is adpressed, heel reaches beyond tip of snout; when 

 limbs are laid along the body, knee and elbow greatly overlap; when 

 hind legs are bent at right angles to body, heels slightly overlap. 

 Skin of upper parts nearly smooth (minutely glandular under micro- 

 scope) except for encysted Cercaria in this specimen; a slight supra- 

 tympanic ridge ending in a short enlargement above the shoulder; 

 posterior surface of femur slightly granular; ventral surfaces smooth. 

 No external vocal sac apparent. 



Dimensions. — Head and body 27.5 mm.; head length 10 mm., 

 width 10.5 mm.; femur 14.5 mm.; tibia 15.5 mm.; foot 12.5 mm.; 

 hand 8 mm. 



Color in alcohol. — Dorsum russet, with a chocolate, light-edged 

 triangle between the eyes, an irregular rounded chocolate mark enclos- 

 ing a light center between the shoulders, and some indistmct dark 

 sufltusions across the sacrum; upper surfaces of limbs puikish buff 

 with fairly regular square cinnamon spots, three on femur, thi-ee on 

 tibia, and several on tarsus; posterior surface of femur with small dark 

 spots on a buff ground; ventral surface immaculate cream buff; the 

 two patches of minute spines on the thumb black; upper lip pale buff 

 with indistinct darker spots. 



Variations .—The other adult males do not vary much from the 

 described specimens. The heel reaches to the tip of the snout in two, 

 beyond the snout in two, and to between the eye and the nostril in 

 one. The skin is naturally rough in three, without this being due to 



