174 ENGTSTOMATID.E. 



Pacliybatraclius, Keferst. Arch. f. Natiirg. 1868, p. 273. 

 Sjstoma, sp., Cope, Journ. Ac. Phihul. (2) vi. 1867, p. 193. 



Pupil erect. Tongue oval, entire and free behind. Choanae very- 

 large, with a dermal movable flap, which can close the nostril ; two 

 small bony prominences close together, between and on a level with 

 the hinder edge of the choanas ; a small pa])illa on the hind margin 

 of each choana ; a narrow denticulated dermal ridge across the 

 sphenoidal region ; another, very broad, in front of the oesophagus. 

 Tympanum hidden or very indistinct. Fingers free ; toes webbed 

 at the base, the tips not dilated. Outer metatarsals united. Pre- 

 coracoidsnone ; sternum a large cartilaginous plate. Diapophyses of 

 sacral vertebra rather strongly dilated. Terminal phalanges simple. 



India. 



1. Cacopus systoma. 



Uperodon marmoratum, Gilnth. Cat. p. 49. 

 Rana svstoma, Schneid. Hist. ^wy;/«. i. p. 144; Peters, Mon. Bert. 



Ac. 1863, p. 82. 

 Engystoma marmoratum, Cuv. H. A. ; Giierin, Icon. Rept. pi. 27. 



Systoma leschenaultii, Tschvdi, Batr. p. 86. 

 Uperodon marmoratum, Dum. Sf Bibr. p 749. 

 Cacopus systoma, Giinfh. Bfijjt. Brit. Ind. p. 415. 

 Systoma marmoratum, Steindachn. Novara, Amph. p. 36. 

 ? Pachybatrachus petersii, Keferst. Arch. f. Naturg. 1868, p. 274, 

 pi. 6. f. 8-10. 



Sternal apparatus. 



Habit very stout. Head small ; mouth small ; snout rounded, 

 without canthus rostralis, as long as or slightly longer than the 

 diameter of the orbit ; interorbital space twice or not quite twice 

 the width of the upper eyelid. Fingers moderate, first a little 

 shorter than second : toes rather short, webbed at the base ; subar- 

 ticular tubercles generally rather indistinct ; two strong, com- 

 pressed, shovel-shaped, metatarsal tubercles, inner very large, as 

 long as second toe. Hind limb short. Skin smooth, upper surfaces 

 sometimes tubercular. Olive or pinkish brown above, marbled with 

 blackish brown ; beneath whitish, immaculate. Male with a sub- 

 gular vocal sac. 



India. 



