102^ KEPTILES. 



12. Hyla boans. 



Hyla boans, Daud. Rain. p. 31. pi. 11, and Rept. viii. p. 64; Latr. 



Rqit. ii. p. 184 ; Dmn. 8f Bibr. p. 605 ; Burmeister, I c. p. 108. 

 Auletris boans, Wac/l. Si/st. p. 201. 

 Hypsiboas boans, Tschudi, Batr. p. 72. 



The three outer fingers very slightly webbed ; head elongate ; 

 snout tapering, but rounded in front ; tongue slightly notched behind. 

 A brown dorsal stripe and a brown band through the nostril, eye, 

 and tympanum ; browTi cross-streaks on the back and legs. South 

 America. 



** Ghroup with vomei'ine teeth in two curved series, each forming an 

 arch, one beside the other, ivhose convexity is forward. ( ^ ,^v ) 



13. Hyla levaillantii. 



Dmn. 8f Bibr. Er^ietol. Gener. p. 550. 



Vomerine teeth between the hinder edges of the inner nostrils ; 

 tympanum two-thirds the width of eye ; fingers very sHghtly webbed ; 

 above brownish. Surinam. 



14. Hyla lichenosa. (Plate VIII. fig. C.) 



Vomerine teeth on a level with the hinder edges of the inner 

 nostrils ; tympanum one-third the width of eye ; skin covered with 

 large flat warts ; fingers one-fourth webbed. 



a. Adult male. South America. Prom Mr. Bates's Collection. 



6. Adult male. Amazons. From Mr. Bates's Collection. 



c. Large female : not good state. America. From Mr. Mather's 



Collection. 

 cl-g. Half-grown and young. Vera Cruz. From Mr. Cuming's 



Collection. 

 h. Half-grown. Cordova. From M. SaUe's Collection. 

 i, Tc. Half-grown and young : not good state. Mexico. From M. 



Parzudaki's Collection. 



Description. — Habit moderately slender ; head broad, short, with 

 flat crown, short blunt muzzle, and roimded eanthus rostraKs ; eye 

 moderate ; tympanum small, circular, half-hidden by an overhanging 

 fold, about one-thii'd the rndth of eye. Extremities moderate, with 

 Avell-developed subarticular tiibercles and moderate disks; fingers 

 one-fourth webbed, toes webbed to the penultimate phalanx. Skin of 

 the upper parts and of the sides covered with large round flat warts ; 

 a broad glandular fold above the tympanum. Tongue nearly circular ; 

 inner nostrils and eustachian tubes moderate ; vomerine teeth in two 

 slightly arched series, scarcely internipted in the middle, on a level 

 with the hinder edge of the nostrils. In the Southern specimens the 



