74 



(3. Tarsal fold present 10. B. gymnauchen p. Si. 



b. Supratyin panic ridge thick. 



a.. Toes nearly entirely webbed . . . . II. B. aspcr p. S2. 



/3. Toes nearly half webbed 12. B. cclebcnsis p. 84. 



II. Parietal ridge present. 



1. Supra-orbital and parietal ridge not con- 

 fluent 13. B. pJiilippiuicus p. 86. 



2. Supra-orbital and parietal ridge continuous. 



a. Parietal ridge much thickened behind. 14. B. claviger p. 86. 



b. Parietal ridge narrow. 



ex.. Parotoid long and narrow. 



f. Tarso-metatarsal articulation 



reaching tympanum or eye . 15. B. quaJriporcatus p. 87. 

 ■(""(". Tarso-metatarsal articulation 



reaching at least tip of snout. 16. B. diverge/is p. 88. 

 /3. Parotoid shorter. 



j. Tarso-metatarsal articulation • 

 reaching between eye and tip 

 of snout, or beyond. First 

 finger longer than second. 



Snout projecting 17. B. parvus p. 88. 



J \\. Tarso-metatarsal articulation 

 reaching the nostril. First 



finger as long as second. . . 18. B. cavator p. 89. 

 fff. Tarso-metatarsal articulation 

 not reaching beyond the eye. 

 First finger usually not longer 

 than second. Snout not pro- 

 jecting 19. B. biporcatus p. 90. 



Doubtful species: 20. B. chlorogaster p, 92. 



Synopsis of the Tadpoles. 



9. B. melanostictus p. 80. 



14. B. claviger p. 86. 



A. Mouth of normal size ( „ DO 



1 17. B. parvus p. 8b. 



[ 19. B. biporcatus p. 90. 



B. Mouth large, the lower lip being much' increased 

 in size. 



I. Tail acutely pointed. Lower lip thickly studded 



with papillae 2. B. pc/iangc/isis p. 75. 



II. Tail rounded. Lower lip bordered with one 



series of papillae IX. B. aspcr p. 82. 



