EHACOPHOEUS. 471 



c'. Upper surfaces finely granulate; heel with a 



dermal appendage -R. malabaricm, 



b. Vomerine teeth in two oblique series between [p. 473. 



the choanpe. 

 a'. Upper sui-faces with small warts, throat 



■ granulate R- beddomii, p. 4J3. 



v. Upper surfaces and throat smooth R. lateralis, p. 473. 



c. Vomerine teeth in two widely separated small 



rounded groups, close to internal angle of 



choante R- tubevculatus, 



B. Fingers not half webbed. [p- 474. 



a. Tympanum more than half diameter of eye. 

 a'. Heel without dermal appendage. 



it". Xo parieto-squamosal arch : head usually 

 rugose, with skin adhering to fronto- 

 parietal bones R. leucomystax, 



b" . A more or less distinct parieto-squamosal [p. 474, 



arch. 

 a. Skin of head free ; disk of 3rd finger 



not more than half diameter of eye . . 7^ maculatics, 

 ^. Skin adherent to nasal and frontoparietal [p. 475. 



bones ; disk of 3rd finger at least 



half diameter of eye R- cruciger, p. 476. 



b'. Heel with a dermal appendage. 



a". Snout not twice as long as diameter of eye. R. eques, t^. A7Q.^ 

 h". Snout twice as long as diameter of eye. . R. iifisiitus, p. 477. 



b. Tympanum nut more than half diameter of eye. 

 «'.' Tongue with a free pointed papilla on 



median line. 

 a". Diameter of eye equal to its distance 

 from nostril, and twice diameter of 



tympanum R- reticulatus, 



b". Diameter of eye more than its distance [p. 477. 



from nostril, and more than twice 

 diameter of tympanum. 

 a. Web scarcely developed between inner 



toes R. dubius, p. 477. 



/3. Web embracing at least half length of 



inner toes R. ncoius, p. S. 



b'. Tongue without papilla. 

 d". Fingers very distinctly webbed. 



a. Tibio-tarsa'l articulation reaching pos- 

 terior border of orbit ; hinder side of 



thighs not coloured R- jerdonii, p. 478. 



/3. Tibio-tarsal articulation reaching centre 

 of eye or beyond ; hinder side of thighs 



brown, speckled with white R. pleurostictus, 



b". Fingers with a very slight rudiment of [p. 479. 



web. 

 a. Snout not longer than diameter of orbit ; 

 tympanum not half diameter of eye. 

 a . Vomerine teeth in two oblique groups [p. 479. 



between choanse R- microfi/mpamim, 



[i'. ^'omerine teeth in two small groups _ [p. 480. 



close to inner front corners of choanse. R. stictottierus, 



