240 CTSTIGNATHID.E. 



than second ; toes moderate, not fringed ; subarticular tubercles 

 well developed ; two small metatarsal tubercles. The hind limb 

 being carried forwards along the body, the tibio-tarsal articulation 

 reaches in front of the tympanum. Skin smooth ; no ventral dis- 

 coidal fold. Brown above ; a broad rose-coloured band occupies the 

 whole back from the nostril to the sacrum ; limbs with blackish 

 cross bars ; lower i)arts greyish, white-spotted. 

 Peru. 



«. Hgr. ? Chyavetas, E. Peru. Mr. E. Bartlett [C.]. (Type.) 



3. Leptodactylus hylsedactylus. 



Cystignathus hylsedactylus, Cope, Proc. Ac. Philud. 1868, p. 115. 



Tongue oval, slightly nicked behind. Vomerine teeth in two 

 slightly arched scries behind the choanse. Snout ovate ; nostril 

 nearer the tip of the snout than the eye : interorbital space broader 

 than the upper eyelid ; tympanum two thirds the width of the eye. 

 Fingers moderate, first not extending beyond second ; toes moderate, 

 not fringed, with distinctly cUlated tips; subarticular tubercles 

 strong ; two minute metatarsal tubercles. The hind limb being 

 carried forwards along the body, the tibio-tarsal articulation reaches 

 the eye. Skin of upper surfaces granular ; a vertebral and dorso- 

 lateral dermal fold, the latter frequently interrupted ; a row of 

 elongate warts on each side ; a ventral discoidal fold. Brown above, 

 indistinctly marbled with darker ; a dark band between the eyes ; 

 hiud limbs cross-barred ; hinder side of thighs dark brown, marbled 

 with white. 



E. S. America. 



a-b. 5 . Demerara Falls. 



4. Leptodactylus longirostris. (Plate XVI. fig. 3.) 



Tongue oval, nicked behind. Vomerine teeth in two slightly 

 arched series behind the choanse. Snout acuminate, much longer 

 than the greatest orbital diameter ; nostril a little nearer the tip of 

 the snout than the eye ; interorbital space narrower than the upper 

 eyelid ; tympanum two thirds the width of the eye. Fiugers 

 moderate, first much longer than second ; toes slender, not fringed ; 

 subarticular tubercles much developed ; a small inner, and a very 

 small, rather indistinct, outer metatarsal tubercle. The hind limb 

 being carried forwards along the body, the tibio-tarsal articulation 

 reaches the tip of the snout. Skin with a few flat warts above ; a 

 glandular lateral fold ; a ventral discoidal fold. Brown above, with 

 rather indistinct darker spots ; a dark angular spot between the 

 eyes ; a blackish-brown streak along the upper lip, the canthus 

 rostralis, and round the tympanum ; legs cross-barred ; hinder side 

 of thighs with a dark brown network ; beneath immaculate. 



Brazil. 

 a-h. $ . Santarem. Mr. Wickham [0.]. 



