1920.] G. A. BouLENGER : Frogs of the Gemis Rana. 57 



Measitrevients in inilHmelres. 



From snout to vent . . 



Head 



Width of head 



Snout 



Eye 



Interorbital width 



Tympanum 



Fore limb . . 



First finger 



Second linger 



Third finger 



Fourth finger 



Hind limb . . 



Tibia 



Foot 



Third toe . . 



Fourth toe 



Fifth toe . . 



1 — 2. N. of Utradit, N. Siam. 3. Nakon si Tamarat, Siam. 4. Karin Bia-po, 

 Upper Burma. 5. Tenasserim. 



Habitat. Tenasserim, Upper Burma. Siam. 



Very closely allied to R. hascheaiia, from which it is distin- 

 guished by the larger and more prominent inner metatarsal tuber- 

 cle and by the presence of tooth-like prominences in front of the 

 lower jaw as well as of vocal sacs in the males. 



21. Rana microdisca. 



/faiia inicrodisca, Boettg., Ber. Offenb. Ver. Xat. 1S92, p. 137 ; F. Miill., 



Verh. Nat. Ges. Basel. X, 1894, p. 839; Boettg-. in Semon, Zool. 



Forscli. Austral. V, p. 113, pi. v, fig. 2 (1894): Bouleng., Ann. Mas. 



Genova (2) XIV, 1894, p. 616, Proc Zool. Sac. 1897, p. 230, and Ann. 



and Mag. N.H. (6) XIX, 1897, p. 508: Van Kampen, Zool. Jahrb., 



Syst. XXII, 1905, p. 702. 

 Rana leytensis, Boettg., Zool. An/.. 1893, p. 365; Bouleng., Proc. Zool. 



Soc, 1S97, p. 229. 



Vomerine teeth in moderately long or rather short, strong, 

 oblique series originating between the choanae and extending be- 

 yond the level of their posterior borders, or entirely behind them. 

 Bony prominences in front of lower jaw barelj^ indicated in females, 

 rather small and pointed in males. 



Head moderate, moderately depressed, as long as broad or a 

 little broader than long ; snout rounded, scarcely projecting bej'ond 

 the mouth, as long as the eye; canthus rostralis distinct; loreal 

 region moderately or feebly oblique, concave; nostril equidistant 

 from the eye and from the end of the snout or a little nearer the 

 latter ; the distance between the nostrils equal to or greater than the 

 interorbital width, which is equal to or less than that of the upper 

 eyelid; tympanum distinct, j to i the diameter of the eye and 

 li to 3 times its distance from the latter. 



Fingers moderate, the tips swollen or dilated into very small 

 discs, first as long as or a little longer than the second, third as long 

 as or a little longer than the snout ; subarticular tubercles moderate. 



