1920.] G. A. BouLENGER : Frogs of the Genus Rana. 45 



often as long as or but slightly shorter than the fore limb ; toes 

 often less broadly webbed. Olive-brown or green above, rarely 

 reddish ; a yellow vertebral streak or broad band rarely present. 



As stated above the distinction of this variety is rather vague 

 and the naming of certain specimens is therefore arbitrary. 



Habitat. Burma, Annam, Siam, Malay Peninsula, Sumatra, 

 Borneo, Philippines. 



12. Rana magna. 



Rana macrodon. part., Bouleng., Cat. Balr. Ecaud., p. 24 (1882). 

 Rana magna, Stejnefj., Smiths. Misc. Coll. 1,11. igog, p. 437. 

 Rana modesta, part., Rou.K, Rev. Suisse Zool. X.KVI, 1918, p. 411. 



Vomerine teeth in moderately long oblique series between the 

 choanae and extending beyond the level of their posterior borders, 

 or just behind them. Lower jaw with two bony prominences in 

 front, feebh' developed and obtuse in females, large and acutely 

 pointed, directed backwards, in adult males. 



Head large, especially in males, much depressed, the sides of 

 the occiput very convex in males, broader than long ; snout rounded 

 or obtusely pointed, feebly projecting be^-ond the mouth, as long 

 as or a little longer than the eye; canthus rostralis more or less 

 distinct, sometimes rather strong; loreal region moderately oblique, 

 concave ; nostril much nearer the end of the snout than the eye ; 

 the distance between the nostrils equal to or less than the inter- 

 orbital width in the adult ; interorbital width equal to or a little 

 greater than that of the upper eyelid, narrower in the young; 

 tympanum very distinct, i to f the diameter of the eye, i to once 

 its distance from the latter. 



Fingers moderate, the tips dilated into very small discs, first 

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

 snout, second and third with a narrow dermal fold on each side; 

 subarticular tubercles rather large, very promitient. 



Hind limb moderately long, the tibio-tarsal articulation reach- 

 ing the eye, the heels just meeting when the limbs are folded at 

 right angles to the bod}'; tibia 3 to 3! times as long as broad, 

 nearly 2 to 2i times in length from snout to vent, shorter than the 

 fore limb, as long as or a little shorter than the foot. 



Toes moderately long, the tips dilated into rather large discs 

 (J to I diameter of tympanum), very broadly webbed, the mem- 

 brane reaching the discs of all the toes ; subarticular tubercles 

 moderately large, very prominent ; a short and feeble tarsal fold ; 

 inner metatarsal tubercle narrow, feebly prominent, about J the 

 length of the inner toe ; no outer tubercle. 



Upper parts with small tubercles or flat warts ; sometimes a 

 transverse fold across the head, behind the eyes ; a strong glandular 

 fold from the eye to the shoulder; j'oung with a narrow glandular 

 fold on each side of the back, beginning behind the upper eyelid. 

 Lower parts smooth. 



Brown above (in spirit), uniform or with ill-defined darker 

 spots and a cross-bar between the eyes ; limbs with dark cross- 



