1920.] G. A. BouLENGER : Frogs of the Genus Rana. 199 



throat ; fore limb strong ; a moderately thick pad on the inner 

 side of the first finger.' 



Nasal bones small, widely separated from each other; eth- 

 moid exposed above, truncate or rounded in front, not extending 

 to the nasals. Terminal phalanges T-shaped. 



Tadpole with a large ventral sucking disc behind the mouth, 

 free on its borders, truncate in front ; tail pointed, the upper crest 

 not extending to the base of the muscular part. Beak black, the 

 edge feebly denticulate; lip much developed, not fringed, with 4 

 series of horny teeth in front, the outermost uninterrupted, and 4 

 behind, only the inner interrupted. This definition is taken from 

 specimens from Bantam, Java, which I have referred to R. jerboa. 



Tadpoles obtained by Max Weber in Java, and referred to the 

 same species by van Kampen, differ in having small papillae on the 



4 

 edge of the lip and 8 upper and 8 lower series of labial teeth {^—^\ ' 



7 

 Which of the two tadpoles reall^^ belongs to R. jerboa is still 

 a question, awaiting a solution until we know the larval form of 

 R. hosii, which also inhabits Java, and the foot of which can hardly 

 be distinguished from that of R. jerboa. 



Eggs 1 1 millim. in diameter, strongh^ pigmented. 

 Habitat. Burma (Kareni hills), Siam, Malay Peninsula, Su- 

 matra, Borneo, Java. 



108. Rana hosii. 



Rana hosii, Bouleng. Aidi. and Mag. N.H.[6), V'lII, 1891, p. 290, and 

 Journ. Fed. Mai. St. Mus. Ill, igoS, p. 62 ; van Kampen, in M. Weber, 

 Zool. Ergebn. Reise Nied. O.-Ind. IV, p. 398 (1907), and Bull. De'p. 

 Agric. Ind. Neei'l. XXV, 1909, p. 2 ; Bouleng. Fau>i. Mai. Pen., Rept. 

 p. 343 (1912) ; van Kampen, Notes Leyd. Mus. XXXVI, 1914, p. 260, 



Rana dttrlieimi, Baumann, Zool. Jahvb., Syst. XXXIV, 1913, p. 275, fig-. 



Vomerine teeth in strong oblique series between the choanae 

 and extending beyond the level of their posterior borders, equally 

 distant from each other and from the latter, or nearer together. 



Head as long as broad or slightly longer than broad, much 

 depressed; snout rounded or obtusely pointed, more or less pro- 

 jecting beyond the mouth, as long as or a little longer than the 

 eye ; canthus rostralis strong ; loreal region sHghtly oblique or 

 nearly vertical, deeply concave ; nostril nearer the end of the snout 

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

 than the interorbital width, which is equal to or a little less than 

 that of the upper eyelid; tympanum very distinct, I to f the 

 diameter of the eye, ij to 3 times as long as its distance from the 

 latter. 



Fingers moderately long, the tips dilated into large discs with 

 a groove separating the upper from the lower surface, those of the 

 third and fourth as large as or a little smaller than the tympanum ; 



1 The statement previously made by me that the vocal sacs are internal and 

 that the tympanum is larger is due to a confusion with R. hosii. 



