5. ixAiirs. 95 



Tympanum about one third the size of 

 the eye ; toes less than one - third 

 webbed ; tibio-tarsal articulation reach- 

 ing beyond the eye 19. punctatus, p. lOi. 



Tympanum about one fourth the size of 

 the eye ; toes slightly -webbed ; tibio- 

 tarsal articulation reaching the tip of 

 the snout 20. tuherculatus, p. 10-1. 



b. Tympanum indistinct or quite hidden, 

 a. Snout pointed. 

 Toos nearly entirely -webbed 8. aciUirostris, p. 99. 



/3. Snout rounded. 

 Tibio-tarsal articulation reaching the 



snout or somewhat beyond; toes 



webbed at the base ; hinder side of 



thighs coloured 4. hypomelas, p. 9 7. 



Tibio-tarsal articulation reaching beyond 



the eye ; toes two - thirds webbed ; 



hinder side of thighs not coloured . . 13. femoralis, p. 101. 

 Tibio-tarsal articulation not extending 



beyond the eye ; toes half webbed ; 



hinder side of thighs not coloured. . . . 14. heddomii, p. 101. 

 Tibio-tarsal articulation reaching beyond 



the eye ; toes two - thirds webbed ; 



hinder side of thighs coloured 15. variabilis, p. 102. 



Tibio-tarsal articulation reaching the eye; 



toes two-thirds webbed; hinder side 



of thighs coloured 22. adspersus, p. 105. 



Toes barely half webbed ; an indistinct 



tubercle at the base of the fourth toe . 16. cinerascens, p. 102. 



3. Skin of upper surfaces with large conical warts. 

 Heel with a triangular dermal appendage. 10. schmardanus, p. 99. 



II. Fingers half webbed. 

 Tympanum hidden 25. bimacuhtus, p. 106. 



1. Izalus opisthorhodiis. 



? Limnodytes ? phyllopMla, Jerdon, Journ. As. Soc. xxii. p. 532, and 



Proe. As. Soc. 1870, p. 85. 

 Ixalus opisthorhodus, Gfiinih. Proc. Zool. Soc. 1868, p. 484, pi. 37. f. 8. 



Tongue with a free pointed papiUa in the anterior part of the 

 median line. Snout subacuminate, prominent, about as long as the 

 orbital diameter ; canthus rostralis angular ; loreal region flat, 

 vertical ; nostril nearly equally distant from the eye and the tip of 



