REPTILES AND BATRACHIANS FROM BURMA 335 



with which it has been confounded by M.'" W. L. Sclater. One 

 of Blyth's type specimens, obtained in Morgui by MJ Theobald, 

 is now preserved in the British Museum. 



16. 1Ra.ji.SL jerTboa. 



Hj'lorana jerboa, Giinth. Proc. Zool. Soc. 1872, p. 599, pi. xL. 



Rana jerboa, Bouleng. Cat. Batr. Ecaud., p. 67 (1882) and Proc Zool. Soc. 

 1892, p. 507. 



Rana masonii , Bouleng. Ann. and Mag. N. H. (5) XIII, 1884, p. 397; Boettg. 

 Ber. Offenb. Ver. Nat. 1892, p. 138. 



Thao : 4 specimens. District of the Karin Bia-po: 3 specimens. 



This addition to the Burmese fauna throws fresh light on 

 the question of the specific distinctness of the Javan R. masonii 

 from R. jerboaj, which has recently been raised by Boettger. 

 The result is shown by the above synonymy. 



The fine specimens obtained by M.'" Fea show the characters 

 upon which I had relied in separating the above named sup- 

 posed species to be merely individual, with the exception, how- 

 ever , of the choanae , which are considerably larger in the 

 specimens referred to the typical R. jerboa (Matang and M.* Dulit) 

 than in those from Java and the Karin Hills. The vomerine 

 teeth may be situated either between the choanae, or just 

 behind the level of their posterior borders ; the length of the 

 tibia varies from two thirds to four fifths the length of head 

 and body, and the femore- tibial articulation reaches the arm-pit, 

 the tympanum, or between these two points. 



The following description is taken from M.'" Fea's specimens : 



Vomerine teeth in two short , transverse or oblique series ; 

 in the male specimen and in two young females, these series 

 are situated in the middle between the choanae ; in two adult 

 and one young female they may be said to be on a level with 

 the posterior borders of the choanae, beyond which they extend ; 

 whilst in the seventh specimen , which is a large female , the 

 teeth are entirely behind the level of the choanae. Choanae mo- 

 derately large, much smaller than the eustachian tubes. Head 

 as long as broad in the large specimens , a little longer than 



