436 DH. M, A, SMITH ON REPTILES AND 



Rana biontivaga, sp. 11. (PI. I. fig. 2.) 



• Vomerine teeth in short oblique groups between the choanae, 

 and extending beyond their posterior margins. Head broader 

 than long ; snout rounded, scarcely projecting beyond the mouth, 

 longer than the eye ; canthus rostralis strong ; loreal region 

 oblique, deeply concave ; nostril a little nearer the tip of the 

 snout than the eye ; distance between the nostrils greater than 

 the interorbital width, which is equal to the width of the upper 

 eyelid ; tympanum very distinct, about half the diameter of the 

 eye, lg-2| times its distance from the latter. 



Fingers moderate, terminating in small discs Avhich bear a 

 groove separating the upper from the lower surface ; 1st a little 

 longer than the 2nd ; subarticular tubercles large and prominent. 

 Hind limb long and shapely; tibio-tarsal articulation reaching to 

 far beyond the snout ; heels strongly overlapping when the limbs 

 are folded at right angles to the body; tibia l^-lj times in 

 length of head and body, much longer than the foot. Toes witii 

 well-developed discs, which are larger than those of the fingers and 

 bear a strongly-marked groove ; web reaching to, and including 

 a portion of the discs of all the toes, but in the case of the 4th it 

 is continued on as a narrow fringe from the 2nd phalanx; outer 

 metatarsals separated nearly to the base, subarticular tubercles 

 large and prominent ; a feeble tarsal fold ; inner metatarsal 

 tubercle oval, 2^ times in length of inner toe ; no outer tubei'cle. 



Skin above granular, with larger tubercles ; a narrow, promi- 

 nent, dorso-lateral fold from the upper eyelid to the hip, strongest 

 in front, sometimes broken up. Lower parts smooth. 



Yellowish-brown or greyish-brown above, usually with indis- 

 tinct blackish markings; sides of the head darker ; limbs with 

 dark cross-bands. Below yellowish-white, usually powdered with 

 brown on the throat and chest. 



Males smaller than females, Avith internal vocal sacs. 



Types from Dalat, Langbian Plateau, at 1500 metres. 



Allied to JR. varians Blgr., from Celebes and the Philippine 

 .Islands ; from which it differs in the stouter habit, broader 



Measurements of type series in mm. 



Author's Nos. ... 5124 5123 5126 2572 5013 4826 2529 2530 4829 5022 



. Snout to vout ... 48 48 48 46 48 75 72 71 66 58 



Head 17 16 18 16 17 25 23 24 22 21 



Width of head... 18 18 17-5 16 17 26 25 26 24 205 



Snout 6-5 7-5 7 7 7 10 11 11 10 9 



Eye 6-5 6-5 6 6 6 8 8 9 8 75 



luterorbital 5 5 5 4 4 6 6 7 Q ^ 



T3'mpanum 4 4 4 3 3 4"5 5'5 5 5 4'5 



Arm 28 30 30 28 31 43 44 47 40 34 



Leg 98 94 95 93 96 140 135 138 138 111 



Tibia 32 32 32 30 31 44 45 45 42 39 



Foot... 30 28 29 27 27 37 41 37 38 34 



