L EiCGTSTOMOrS. 275 



The Biifonidce include terrestrial, burrowing, thoroughly aquatic 

 (Nectes), and apparently arboreal {Xeciophryne) types ; Bhinoi)linjHus 

 is a true ant-eater, as are several forms of Enr/ijstomatidce. 



fSi/nojJsis of the Genera. 



Fingers free, toes nearly free ; sternum with a well-ossilied style. 



1. Engystomops, p. 275. 

 Fingers and toes free ; sternum a weak cartilage. 



2. Pseudophryne, p. 277. 

 Fingers and toes more or less webbed, the tips dilated into regular 



disks : sternum cartilaginous 3. Nectophryne, p. 279. 



Fingers free, toes more or less webbed ; sternum either cartilaginous, 



or with a semiossified style 4. Bufo, p. 281. 



Fingers free, toes very broadly webbed ; nostrils directed upwards. 



5. Nectes, p. 327. 

 Vomerine teeth ; a dermal ridge between the choause ; sternum 



rudimentary 6. Notaden, p. 328. 



Pupil erect ; fingers and toes free ; sternum ossified on the median 



luic 7. Myobatrachus, p. 328. 



Pupil erect ; tongue free in front ; sternum rudimentary. 



8. Rhinophrynus, p. 329. 



1. ENGYSTOMOPS. 



Paludicola, (7ion Wagler) Cope, Proc. Ac. Philud. 1864, p. 180. 

 Engystomops, Espada, An. Soc. Esp. i. 1872, p. 86. 

 Microphryne, Peters, Man. Berl. Ac. 1873, p. 016. 

 Peralaimos, Espada, Viaj. Pad/., Vert. p. 163. 



Pupil horizontal. Tongue elliptic, entire and free behind. Vo- 

 merine teeth none. Tympanum distinct or hidden. Fingers free, 

 toes nearly free, the tips simply swollen. Outer metatarsals united. 

 A cartilaginous omosternum ; sternum with a bony style. Diapo- 

 physes of sacral vertebra moderately dilated. Terminal phalanges 

 simple or anchor-shaped. 



Tropical America. 



Symps'is of the Species. 



Tympanum hidden ; tibio-tarsal articulation 



not reaching the eye 1, pustulosus, p. 275. 



Tympanum more or less distinct ; tibio-tarsal 



articulation reaching the eye 2. stentor, p. 276. 



Tympanum very distinct, half the width of 



the eye; distal phalanges anchor-shaped . . 3. jyetersii, p. 27G. 



1. Engystomops pustulosus. 



Paludicola pustulosa, Cope, Proc. Ac. Philad. 1864, p. 180. 

 ]Microphi7ne pustulosa, Cope, Joiirn. Ac. Philad. (n. s.) viii. p. 1.5o. 



T 2 



