13. lEPTODACITLTJS. 239 



6. Tibio-tarsal articulation not reaching beyond the nostril. 

 a. Tympanum at least two thirds the width of the 

 eye. 



Snout rounded 8. pentadactylus, p. 241. — 



Snout rather prominent ; hind limbs re- 

 gularly cross-barred 11. mystacinus, p. 244. — 



Snout acuminate, prominent ; back with 



longitudinal folds 15. typhonius, p. 246. — 



j3. Tympanum not two thirds the width of the eye. 



Snout rounded 9. rubido, p. 243. 



Snout acuminate; tibio-tarsal articulation 



reaching beyond the eye 10. poseilochilus, p. 243 



Snout a little projecting ; tibio-tarsal ar- 

 ticulation reaching in front of the eye ; 

 no glandular lateral fold 13. perlcevis, p. 245. 



Snout prominent; tibio-tarsal articulation 



not reaching beyond the eye 14. aliilabris, p. 245. 



y. Tympanum not half the width of the eye. 



No glandular lateral fold 12. microtis, p. 244. 



II. Toes with distinct dermal margins. 



1. No membranaceous fold along the tarsus. 



Back with longitudinal folds 16. oeellatus, p. 247. ~~~ 



Fo longitudinal folds on the back 17. caliginesus, p. 247.^.^_ 



2. A membranaceous fold along the inner side of the tarsus. 

 Inner metatarsal tubercle spur-like .... 18. podioipinus, p. 248. 

 Inner metatarsal tubercle oval 19. gaudichaudii, p. 249. ^~ 



1. Leptodactylus pustulatns. 



Entomoglossus pustulatus, Peters, Mon. Berl. Ac. 1870, p. 647. 



Tongue heart-shaped. Vomerine teeth in two short series behind 

 the choanse. Snout rounded ; tympanum half the width of the 

 eye. Fingers and toes moderate, pointed, the latter not fringed ; 

 first finger a little longer than second. Skin finely wrinkled above. 

 Brown, indistinctly banded longitudinally ; beneath with numerous 

 small yellowish-white spots. 



Ceara, N. Brazil. 



2. Leptodactylus rhodonotus. 



Oystignathus rhodonotus, Qunth. Proc, Zool. Soc. 1868, p. 481, 

 pi. 37. f. 1. 



Tongue heart-shaped. Vomerine teeth in two slightly curved 

 series behind the choanse. Snout rounded, slightly longer than the 

 greatest orbital diameter ; nostril nearer the tip of the snout than 

 the eye ; interorbital space as broad as the upper eyelid ; tympanum 

 two thirds the width of the eye. Kngers moderate, first longer 



