288 U.S. NATIONAL MUSEUM BULLETIN 288 



very slightly projecting, their distance from end of snout about one- 

 half that from eye, separated from each other by an interval equal to 

 their distance from eye. Canthus rostralis moderately defined; loreal 

 region flat and nearly vertical, the upper lip not flaring out appreci- 

 ably below it. Eye not large, but prominent due to black choroid coat 

 of eye showing through translucent upper lid; its diameter slightly 

 greater than its distance from nostril; palpebral membrane not retic- 

 ulate; interorbital distance greater than width of upper eyelid, which 

 is relatively narrow and not as wide as distance between nostrils. 

 Tympanum distinct, about one-third the diameter of eye, separated 

 from eye by a distance nearly equal to its own diameter. Fingers 

 webbed at base, the web on third finger reaching base of antepenulti- 

 mate phalanx; fourth finger about equal to second, neither reaching to 

 disk of third; disk of third slightly more than covers the tympanic 

 area; no projecting rudiment of a pollex; no ulnar ridge. Toes slightly 

 more than one-half webbed, the web on fourth toe reaching base of 

 penultimate phalanx, third and fifth toes subequal, disk of fourth toe 

 just covering the tympanic area; a small distinct oval inner and a 

 smaller but distinct rounded outer metatarsal tubercle; no outer but a 

 low inner tarsal ridge; no dermal appendage on heel. Body not elon- 

 gate, in postaxillary region a little narrower than greatest width of 

 head; when hind leg is adpressed, heel reaches anterior margin of eye; 

 when limbs are laid along the side, knee and elbow meet; when 

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

 A moderately well-developed patagium extends from the back of 

 upper arm to side of body. Skin of upper parts smooth. A pair of sub- 

 dermal glandular(?) areas, somewhat lavender in color, give a super- 

 ficial appearance of pale lavender dorsolateral stripes extending from 

 the region of shoulders to just above groin. A rather narrow glandular 

 ridge encircling upper part of tympanum; skin of throat and chest 

 smooth, that of belly and lower surface of thigh uniformly and very 

 finely granular; a well-developed skinfold across chest; adult male, 

 vocal sac subgular, finely wrinkled, and greatly distended. Skin of 

 head not co-ossified with skull, roof of skull not exostosed. 



Dimensions. — Head and body, 21.4 mm.; head length, 6.7 mm.; 

 head width, 6.6 mm.; femur, 8.2 mm.; tibia, 10.2 mm.; heel-to-toe, 

 14.4 mm.; hand, 6.1 mm. 



Color in alcohol. — Dorsally and ventrally this specimen is a uniform 

 pale brownish yellow. The loreal regions are slightly pigmented with 

 pale brown, which is most heavily (but still not conspicuously) con- 

 centrated along the canthal region. Posterior to the eye this pigment 

 continues as a narrow darkened strip that passes above the tympanum 

 along the side to the sacral region where it fades out. There is no 

 evidence of pigmentation on the limbs or venter. 



