106 Mr. G. A. Boulenger ou neio 



IX. — Descriptions of Three, new Frogs in the Collection of 

 the British Museum. By G. A. BoULENGER, F.ll.S. 



(Published by permission of the Trustees of the British Museum.) 



Rana hymenopus. 



Vomerine teetli in long, transverse, sliorlitly arched, oblique 

 series between tiie clioanaj, originating !it the anterior corners 

 of tlie latter and terminating on a line with their posterior 

 borders. Head a little broader than long, much depressed ; 

 snout rounded, scarcely projecting, a little longer than the 

 eye; canthus rostralis rounded; loreal region very oblique ; 

 nostril a little nearer the eye than the tipo£ the snout; inter- 

 orbital width three-fourths that of the upper eyelid ; tympanum 

 very distinct, two-thirds the diameter of the eye. Fingers 

 rather slender, obtusely pointed, first and second equal ; 

 subarticular tubercles rather large and very prominent. 

 Hind limb rather slender ; tibio-tarsal articulation reaching 

 the tip of the snout, heels overlapping when the limbs are 

 folded at right angles to the body ; tibia 4^ times as long as 

 broad, 1|^ times in length of head and body ; toes slender, 

 obtusely pointed, half-webbed, three phalanges of fourth and 

 two of third and fifth free ; outer metatarsals united in the 

 basal half ; subarticular tubercles moderately large and very 

 prominent ; inner metatarsal tubercle oval, very prominent, 

 one-third the length of the inner toe ; no outer tubercle. 

 Skin smooth ; a glandular fold from below the eye to the 

 shoulder. Greyish olive above, with dark dots and irregular 

 spots; limbs with regular dark cross-bars; hinder side of 

 thighs dark brown, with small yellow spots ; lower parts 

 white, throat spotted with brown. 



From snout to vent 57 mm. 



A single female specimen, labelled " South Africa/' pre- 

 sented by Sir Andrew Smith. 



In its half-u ebbed toes this frog constitutes an interesting 

 link between the typical Ranee and the group Strongylopus 

 of Tschudi. 



Rana pumiJio. 



Vomerine teeth in very short oblique series close to the 

 anterior corners of the choanse. Head slightly longer than 

 broad, much depressed ; snout obtusely pointed, projecting, 

 slightly longer than the eye ; canthus rostralis rounded ; 



