74 



f3. Tarsal fold present lo. B. gymnaiiclicn p. 8i. 



b. Supratympanic ridge thick. 



X. Toes nearly entirely webbed . . . . \\. B. aspcr p. 82. 



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



II. Parietal ridge present. 



1. Supra-orbital and parietal ridge not con- 

 fluent 13. />. phUipphiictis p. 86. 



2. Supra-orbital and parietal ridge continuous. 



, a. Parietal ridge much thickened behind. 14. B. clavigcr p. 86. 

 b. Parietal ridge narrow. 



X. Parotoid long and narrow. 



"f. Tarsii-inetatarsal articulation 



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

 tf. Tarso-metatarsal articulation 



reaching at least tip of snout. 16. B. divcrgciis p. 88. 

 j3. Parotoid shorter. 



\. Tarso-metatarsal articulation • 

 reaching between eye and tip 

 of snout, or beyond. First 

 finger longer than second. 



Snout projecting \']. B. parvus p. 88. 



If. Tarso-metatarsal articulation 

 reaching the nostril. First 



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

 tff. Tarso-metatarsal articulation 

 not reaching beyond the eye. 

 First finger usually not longer 

 than second. Snout not pro- 

 jecting l(). B. bipcrcatus p. 90. 



Doubtful species: 20. B. chlorogastcr p. 92. 



Synopsis oft he Tadpoles. 



9. B. iiiclanostlctiis p. 80. 



14. /). clavigcr p. 86. 



A. Mouth of normal size ( ^, „_ 



17. B parvus p. 65. 



19. B. biporca/iis 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. pcnaiigcnsh p. 75. 



II. Tail rounded. Lower lip bordered with one 



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



