74 EANID^. 



Polypedates, Tschudi, Batr. p. 34 ; Dttm. Sj Bibr. p. 515 ; Gunth. 



Cat. p. 77 ; Cope, I. c. 

 Boophis, Tschudi, I. c. p. 36. 

 Biii'geria, Tschudi, I. c. p. 75. 

 Hypsiboas, sp., Wagler, Syst, Amph. p. 200. 



Pupil horizontal. Tougue free and deeply notched behind. 

 Vomeriue teeth. Tympanum generally distinct. Fingers and toes 

 more or less webbed, the tips dilated into regular disks. Outer 

 metatarsals separated by web. Omosternum and sternum with a 

 bony style. Terminal phalanges generally bifurcate, sometimes 

 obtuse. 



East Indies ; Japan ; Madagascar. 



The recent discovery of several remarkable forms has much 

 affected the old division of the species into two genera, Polypedates 

 and BJiacopJiorus, which was based on the development of the 

 interdigital web. Without further entering upon this question, T 

 may observe that two species which differ much in the extent of the 

 web between the fingers, viz. Polypedates scldcgelii and Phacophorus 

 maximus, resemble each other so much in all other respects that they 

 must be considered closely allied forms. As to the arrangement pro- 

 posed by Mr. Cope, viz. to place the species with undivided terminal 

 phalanges in the genus Ixalus, I think that such a division would be 

 very unnatural, as it would lead ns to separate generically R. micro- 

 tympanum from P. pleurostictus. 



Synopsis of the Species. 

 I. Pingors not more than half webbed. 

 A. Heel without dermal appendage. 



1. Vomerine teeth extending backwards beyond the level of 



the hinder edge of the choanaj. 



Vomerine teeth in a straight line ; fingers 



nearly one-third webbed; tympanum at 



least two thirds the size of the eye 1. rjoudoti, p. 76. 



Vomerine teeth in two oblique groups ; fingers 



very slightly webbed ; disks as large as 



tympanum 3. crossleyi, p. 77. 



Tympanum half the size of the eye ; disks as 



large as tympanum 2. dispar, p. 77. 



2. Vomerine teeth between the choana?. 



a. Pingers not more than one-third webbed. 



a. Tympanum hidden 8. surdus, p. 79. 



/3. Tympanum distinct, more than half the width of the 

 eye. 

 A glandular lateral fold 6. hecticus, p. 78. 



J 



