1920. J G. A. BouLENGER : Frogs of the Genus Rana. 135 



I, 2, 3. 4. 5, 6. 7. 8. 9. 



1-2. Amoy (types). 3-5. Man Son Mts., Tonkin. 6. Chang Nam, Anam. 7-9. 

 ? (types of R. elegans). 



Habitat. China (Hong Kong, Canton, Amo}', Hainan, Sze 

 Chuen), Tonkin, and Anam. 



65. Rana mortenseni. 



Rana gnenfheri, p:\yt., Bouleng. Ann. Miis. Genova (2) XIII, 1893, 



P- 331- 

 Rana morte?iseni, Bouleng. Ann. and Mag. N.H. (7) XII, 1903, p. 219. 

 Rana nigvovittata {^non Bouleng.), Malcolm Smith, Journ. N. H. Soc. 



Siani, II. 1916, p. 42, pi. — . 



Vomerine teeth in small groups between the choanae or short 

 oblique series usually extending beyond the level of their pos- 

 terior borders, nearer to each other than to the latter. 



Head much depressed, as long as broad ; snout rounded, 

 feebly projecting be^^ond the mouth, as long as the eye; canthus 

 rostralis distinct ; loreal region moderately oblique, concave ; nostril 

 a little nearer the tip of the snout than the eye ; distance between 

 the nostrils greater than the interorbital width, which equals that 

 of the upper eyelid ; tympanum very distinct, ? to | the diameter 

 of the eye, 4 times its distance from the latter. 



Fingers moderate^ long, the tips swollen, first longer than the 

 second, third longer than the snout; subarticular tubercles rather 

 large, prominent. 



Hind limb long, the tibio-tarsal articulation reaching the 

 nostril or the tip of the snout, the heels strongly overlapping when 

 the limbs are folded at right angles to the body ; tibia 4 to 4|- 

 times as long as broad, if to 2 times in length from snout to 

 vent, shorter than the fore limb, as long as or slightly longer than 

 the foot. Toes rather long, the tips dilated into small discs with 

 a groove separating the upper from the lower surface, J to nearl}^ 

 entirely webbed^ i or 2 phalanges of fourth free, the web reaching 

 the discs of the third and fifth and penetrating almost to the base 

 of the outer metatarsals; subarticular tubercles rather small, pro- 

 minent ; no tarsal fold ; inner metatarsal tubercle oval, feebh^ pro- 

 minent, ? to \ the length of the inner toe; a small round outer 

 tubercle. 



