13, LEPTODACTYLFS. 245 



widtli of tlie eye. Toes M-ithout dermal margins. The hind limli 

 l)eing carried forwards along the body, the tihio-tarsal arriculation 

 reaches the posterior border of the 'orbit. Dorsal skin without 

 glandular folds ; an abdominal discoidal fold. Colour al)ove dark 

 brown, with a blackish pale-edged triangle between the eyes, witli 

 its apex directed posteriorly ; a dark light-edged spot below tlio 

 front of the orliit : tympannm and a streak behind it blackish, 

 (iuauajnato, Mexico. 



13. Leptodactylus perlsevis. 



C'ystigiiatluis perhtvis, Cope, Proc. Amer. Philos. Sue. xviii. 1,^70, 

 p. 269. 



Tongue a longitudinal oval, entire. Vomerine teeth in two short 

 transverse series behind the choanal. Snout a little projecting, with 

 distinct canthus rostralis, the nostrils about one third the distance 

 from its apex to the orbit ; tympanum not quite two thirds the 

 width of the eye. First finger a little longer than second ; foot 

 slender ; plantar tubercles insignificant. The hind limb being carried 

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

 front of the eye. Skin exceedingly smooth and shining, without 

 glandular folds: an abdominal discoidal fold. Dark ashy grey 

 above: sides blackish above, speckled with white and blackish 

 above ; an interorbital dark spot ; upper lip marbled : posterior face 

 of femora dark, with light specks ; posterior limbs obscurely cross - 

 banded. 

 Tehuantepec. 



14. Leptodactylus albilabris. (Plate XVI. fig. 4.) 



Cvstigijathus albilabris, Gii/it/i. Ann. S,- Mac/. N. H. (3) iv. p -^17 • 



Reinh. c5- LiM: Videiisk. Medclel. 1862, p.'SOo. 



caliginosus, Brocc/ii, Bull. Soc. Phihm. (7) i. p, ISO. 



labialis, Cop(\ Proc. Amor. Philos. Soc. xvii, p. 00, rnul x\m 



p. 2G0, 



Leptodactylus caliginosus. Broccln, Miss. Sc. M/'.r,, Bnfr. p .•=i7, pi o 

 f. 1. ' ' ■ I n ■ ■ 



labialis, Brocchi, I. e. p. 20. 



albilabris, Boiilem/. Bull. Soc. Zool. France. 1881, p. ;>!. 



Tongue oval, slightly nicked behind. Vomerine teeth in two 

 slightly curved series "behind the choanaj. Snout subacuminate, 

 with prominent upper lip, a little longer than the greatest orbital 

 diameter: nostril a little nearer the tip of the snout than the eye : 

 interorbital space not much narrower than the njjpcr eyelid ; tym- 

 pannm not quite two thirds the width of the eye. Fingers mode- 

 rate, first longer than second : toes moderate, not fringed : subar- 

 ticular tubercles well developed ; sole with regular series of small 

 tubercles corresponding with the metatarsals ; two small metatarsal 

 tubercles. The hind limb being carried forwards along the body, 

 the tibio-tarsal articulation reaches the eye, or not quite so far. 



