13. CASSINA. 131 



13. CASSINA. 



Cystif^iatlins, sp., Dum. S)- Bibr. viii. p. 418 ; G'dnth. Cat. p. 30. 

 Kassiiia, Girard, Froc. Ac. Pliilad. vi. 1853, p. 421 ; Cope, Nat. Hist, 

 liec. 1805, p. 115. 



Pupil vertical. Tongue heart-shaped, free behind. Vomerine 

 teeth. Tympanum distinct. Fingers free, toes free or slightly 

 webbed, the tips not dilated. Outer metatarsals not separated. 

 Omosternum and sternum with a bony style. Terminal phalanges 

 simple. 



Tropical Africa. 



This genus is closely allied to the following. 



1. Cassina senegalensis. 



Cystignathus seuegalensis, Gi'inth. Cat. p. 30. 

 Cystignathus senegalensis, Dum. Sf Bibr, p. 418 ; Smith, III. S. Afr. 



pi. 62. 

 Kassina senegalensis, Girard, Proc. Ac. Philad. vi. p. 421. 

 Cystignathus argyreivittis, Peters, Arch.f. Naturg. 1855, p. 55. 



Vomerine teeth in two oblique groups between the choanae. Head 

 as broad as long; snout rounded, without canthus rostralis, its 

 length more than the greatest orbital diameter ; interorbital space as 

 broad as the upper eyelid ; tympanum slightly distinct, two thirds 

 the width of the eye. Fingers and toes short, quite free ; an oval 

 inner, and a very small rounded outer metatarsal tubercle. The 

 hind limb being carried forwards along the body, the tarso-meta- 

 tarsal articulation reaches the tympanum. Skin smooth, slightly 

 granular on the belly and under the thighs. Light browaish or 

 olive above, with largo elongate dark-brown spots, generally con- 

 fluent into three stripes along the back ; light olive-brown beneath, 

 the throat blackish in the male. Latter with a large, longitudinally 

 ovate, adhesive disk on the throat, and two introverted external 

 subgular vocal sacs ; the throat, on the sides and behind the 

 adhesive disk, strongly and regularly plaited. 



Tropical Africa. 



a-d. S 2 . Cape of Good Hope. Sir A. Smith [P.] 



e. Very bad state. Zambesi. Sir J. Kirk [P.]. 



2. Cassina wealii. (Plate XL fig. 7.) 



Vomerine teeth in two small indistinct oblique groups between 

 the choanse. Head broader than long ; snout rounded, Avithout 

 canthus rostralis, as long as the greatest orbital diameter ; interor- 

 bital space as broad as the upper eyelid ; tympanum slightly distinct, 

 half the width of the eye. Fingers slender ; toes moderate, slightly 

 though distinctly webbed at the base ; two nearly equal-sized meta- 

 tarsal tubercles. The hind limb being carried forwards along the 

 body, the tarso-metatarsal articulation reaches the eye. tSkiu smooth, 



k2 



