496 



BNGYSTOMATID^T!. 



toes webbed at the base, the tips not dilated. Outer metatarsals 

 united. Xo prsecoracoids ; sternum a large cartilaginous plate. 

 Diapophyses of sacral vertebra rather strongly dilated. Terminal 

 phalanges simple. 



Burrowing Batrachiaus, feeding chiefly on ants. 



Si/Hopsis of the Specle6-. 



Suout scarcely longer than diameter of orbit. . 

 Snout nearly twice diameter of orbit 



C. sy stoma, p. 496. 

 C. ylvhuIot,us, p. 497. 



99. Cacopiis sj'^stoma. 



Eana systoma, Sclmeid. Hist. Amph. \, p. 144. 

 Uperodon marmoratum, Dinn. i^' Bibr. JSrp. Gen. viii, p. 749. 

 Oacopus systoma, Gilnth. Itept. B.I. p. 415 ; Bouleng. Cat, Batr. 

 Sal. p. 174. 



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

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

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

 width of the upper eyelid, i'ingers moderate, first a little shorter 

 than second ; toes rather short, webbed at the base ; subarticular 



Fig. 13(). — Carojntf ^i/stonui. 



tubercles rather indistinct ; two strong, compressed, shovel-shaped 

 metatarsal tubercles, imaer very large, as long as the second toe. 

 iSkhi smooth, upper surfaces sometimes tubercular. OliAe or 

 pinkish brown above, marbled with blackish broMn ; beneath 

 whitish, immaculate. Male with a subgular vocal sac. 



Prom snout to vent 2*5 inches. 



Hah. India : Carnatic, Biligiriranga Hills, Mysore, Madras. 



According to Thurston, this frog is sometimes found in large 

 numbers at night in Madras compounds during the monsoon, 

 emitting a characteristic sound. It is unfortunate that no 

 observations have been made on the breeding-habits, which cannot 

 but prove of great interest. 



