4. HTLA. 349 



1. Hyla maxima. 



Hvla lang-sdortiii, Giinth. Cat. p. 98. 

 Seha, i. t. 72. f. .3. 



Rana maxima, Laiir. Syn. Rept. p. 32. 

 Calamita maxima, Schneicl. Hist. Ampli. p. 163. 

 Hyla palmata, Daud.yEain. p. 38, pi. 14, and Rejit. viii. p. 79. 



geograpliica, Sphb. Spec. Nov. Test. Ran. p. 39, pi. 11. f. 1. 



Calamita palmatus, Me\-r. Tent. p. 173. 



Hypsiboas palmata, part., TVac/l. St/st. Amph. p. 200; Tschudi, Batr. 



p. 73. 



geographica. part., Wagl. I. c. 



Hyla palmata, part., Dum. iy Bihr. p. 545. 



— — { Centrotelma) laugsdorffii, Bunneist. Erliiufer. Faun. Bras. 



p. 100. 

 Oinclidium gramilatiim, Cope, Journ. Ac. Philad. (2) yi. 1867, 



p. 202. 

 Hyla maxima, Peters, Mon. Berl. Ac. 1872, p. 218. 



Tongue subcircular, entire, adherent. Vomerine teeth bet\veen 

 the very large choanse, in two angular series, forming together a 

 /"\-like figure. Head large, depressed, a little broader than long ; 

 snout subacumiuate, nearly twice as long as the diameter of the 

 eye ; loreal region very oblique, concave ; canthi rostrales angular, 

 forming with the raised borders of the frouto-parietals a lozenge- 

 shaped figure ; crown concave ; the greatest width of the interorbital 

 space measures twice the width of the upper eyelid; tympanum 

 very distinct, two thirds or three fifths the width of the eye. Three 

 outer fingers entirely webbed ; a distinct rudiment of pollex ; toes 

 entirely webbed ; disks of fingers and toes smaller than the tympa- 

 num ; siibarticular tubercles moderate. The hind limb being carried 

 forwards along the body, the tibio-tarsal articulation reaches to the tip 

 of the snout, or to between that point and the eye. Upper surfaces 

 minutely granulate ; belly and lower surface of thighs covered with 

 large granules ; a slight dermal fold along the outer edge of the 

 forearm and of the tarsus ; heel with a short triangular dermal 

 appendage. Brown or reddish above, variegated with lighter and 

 darker ; limbs generally with dark cross bars ; sometimes a dark 

 vertebral line from end of snout to sacrum ; lower surfaces whitish, 

 immaculate, the male's throat brown. Male with an iuternal sub- 

 gular vocal sac. From snout to vent 117 millim. 

 Guianas ; Brazil. 



a-h, c. c? $ . Demerara Falls. 



d. S • I^i^it- Guiana. Sir R. Schomburgk [P.]. 



e. S J skeleton. Brit. Guiana. 

 /••$. ? 



2. Hyla appendiculata. (Plate XXIII. fig. 2.) 



Hyla geographica, Giinth. Cat. p. 99. 

 Hyla (CentroteWa) geographica, Burineist. Erlduter. p. 99. 



Tongue subcircular, entire or slightly nicked, adherent. Vome- 

 rine teeth between the very large choante, in two series, forming 



