Revised List of South African Reptiles and Batrachians. 525 

 Family RANID^. 



Nine Genera in South Africa. 



I. Pupil horizontal. 



A. Tips of fingers and toes not dilated into large disks. 



1. Vomerine teeth present; tongue without a free 

 papilla in the middle. 



Outer metatarsals separated by web ; inner metatarsal tubercle 



small, soft liana. 



Outer metatarsals bound together; inner metatarsal tubercle 



large, hard, compressed Pyxicephalux. 



2. Vomerine teeth absent. 



Outer metatarsals separated by web ; toes webbed ; tongue deeply 



notched behind Phryvohatrachus. 



Outer metatarsals bound together ; toes free or nearly so ; 



tongue feebly notched ArthroleptU. 



B. Tips of fingers and toes dilated into large disks. 



Outer metatarsals separated by web ; vomerine teeth present ; 



two inner fingers opposable to two outer Chiroinaiith. 



Outer metatarsals bound together ; vomerine teeth absent .. Rafpia. 

 II. Pupil vertical ; outer metatarsals bound together. 



A. Tips of fingers and toes dilated into large disks ; toes 

 webbed. 



Vomerine teeth absent Mecialixalus. 



Vomerine teeth present Hylamhates. 



B. Tips of fingers and toes not dilated ; toes free or with a 

 rudiment of web . . . . Cassiiia. 



1. EANA. 



Linn. S.N. i. p. 354 ; Bouleng. Cat. Batr. p. 6. 



Eight Species in South Africa. 



I. Vomerine teeth in two oblique groups or short transverse 

 series between or just behind the level of the choanse. 



A. Eyes supero-lateral, interorbital space much narrower 

 than the upper eyelid ; toes at least two-thirds webbed ; 

 hind limbs with more or less regular dark transverse 

 spots or cross-bars ; males with internal vocal sacs. 



Tibio-tarsal articulation not reaching, or barely reaching, the 

 tip of the snout, the leg (tibia) not more than half length of 



head and body Pi.fiiscigula. 



Tibio-tarsal articulation reaching beyond tip of snout, the leg 



more than half length of head and body B. delalandii. 



B. Eyes lateral, interorbital space nearly as broad as the 

 upper eyelid ; toes about half, or barely two-thirds 

 webbed ; skin perfectly smooth on the back ; leg not 

 more than half length of head and body ; hind limbs 

 without dark transverse spots or cross-bars ; males 

 with external vocal sacs. 



