148 BNGTSTOMATID^. 



Pupil erect ; tongue oblong ; palatine bones forming an acute ridge ; 

 tympanum hidden 11. Callula, p. 167. 



Tongue heart-shaped ; palatine bones each with two curved teeth ; 

 tympanum distinct 12. Xenobatrachus, p. 172. - 



Pupil erect ; tongue large, oblong, nicked behind ; tympanum hid- 

 den ; toes free 13. Phrynomantis, p. 172.. ' 



Pupil erect ; tongue oval ; two small bony prominences between the 

 choanae ; toes webbed at the base . . 14. Cacopus, p. 173. 



Piipil erect ; tongue divided into two lateral halves by a deep groove. 



15. Glyphoglossus, p. 175. 



III. Preooracoids present ; coracoids very much dilated. 

 Pupil horizontal; no palatine teeth. . 16. Breviceps, p. 176.' "— 

 Palatine teeth 17. Rhombopliryiie*, p. 177. ' 



IV. Preooracoids present ; coracoids directed backwards. 

 Pupil erect 18. Hemisus, p. 178. — 



1. RHINODERMA. 



Bhinodei'ma, i>Mm. ^ Bibr. viii. p. 657 ; Giinth, Cat. p. 48 ; Cope, 

 Journ. Ac. PhUad. (2) vi. 1867, p. 196. 



Pupil horizontal. Tongue subtriangular, entire or slightly nicked 

 and free behind. Vomerine teeth none. Tympanum hidden, or 

 slightly distinct. Pingers with a slight rudiment of web ; toes 

 incompletely webbed, the tips not dilated. Outer metatarsals united. 

 Coracoids and preooracoids parallel ; a cartilaginous omostemum ; 

 a cartilaginous sternum. Diapophyses of sacral vertebra mode- 

 rately dilated. Terminal phalanges simple. 



Chili. 



1. Rhinodenua darwinii. 



Rhinoderma darwinii, Oiinth. Cat. p. 48. 

 Rhinoderma darwinii, Dum. 8f Bibr. p. 650 ; Bell, Zool. Beagle, 

 Rept. p. 48, pi. 20. f . 1 & 2 ; Ouiclien. in Oay, Hist. Chile, 

 p. 122, pi. 7. f. 1-10 ; Girard, U.S. Expl. Exped., Serp. p. 71 ; 

 Cunningh. Trans. Linn. Soc. xxviii. p. 468; Eapada, Viaj. Pacif., 

 Vert. p. 129. 



Snout triangular, ending in a dermal lobe ; canthus rostralis 

 angular ; loreal region vertical ; interorbital space broader than the 

 upper eyelid. Fingers moderate, pointed, first shorter than second ; 

 toes rather slender, pointed, one-third webbed; subartioular tubercles 



* Sternal structure unknown, but the animal stated to be closely allied to 



