244 C^SXIGNATHID^. 



hind limb being carried forwards along the body, the tibio-tarsal 

 articulation reaches between the eye and the nostril. Skiu smooth, 

 a narrow glandular lateral fold from the eye to the groin ; a ventral 

 disk. Brown above, immaculate or with dark regular spots ; a light- 

 edged crescent-shaped band between the eyes ; a dark-brown strij)e 

 along the cauthus rostralis and on the temporal region ; limbs cross- 

 barred ; hinder side of thighs dark brown, with a more or less 

 distinct longitudinal white stripe, Male with internal vocal sacs; 

 thumb without spijie-bearing tubercles. 

 E. S, America. 



a-h. (5 2 . Demerara Falls. 



c-d, e. d" 5 . 8ininam. Hr. A. Kappler [C.]. 



/. $. Interior of Brazil. 



ii. Leptodactylus mystacinus. 



Cystignathus schomburgkii, GiintJi. Cat. p. 29. 

 Cystigiiatliiis my^itacinus, Burmeistcr, Sfi'se La Plata., ii, p. 533. 



mystaceus, Hensel, Arch. f. Natvr<i. 1867, p. 125. 



Leptodactylus wiicliereri, Espada., J'iaJ. Pacif., Tertebr. p. 68. 



Tongue oval, indistinctly nicked behind. Vomerine teeth in two 

 slightly arched series behind the choana?, 8nout rounded, slightly 

 prominent, longer than the greatest orbital diameter ; nostril nearer 

 the tip of the snout than tlie eye ; interorbital space narrower than 

 the upper eyelid : tympanum two thirds the width of the eye. 

 Fingers moderate, first longer than second ; toes moderate, not dis- 

 tijictly fringed ; subarticular tubercles moderate ; two small meta- 

 tarsal tubercles. The hind liml> being carried forwards along the 

 body, the tibio-tarsal articulation reaches the tympanum. Skin 

 smooth, distinctly porous on the back and on the upper surface of the 

 thighs, calves, and tarsi ; sides with large oval or rounded glandules ; 

 a fold above the tympanum ; a ventral discoidal fold. Brown or olive 

 above ; upper lip dark brown ; a dark-brown stripe from- the tip of 

 the snout along the canthus rostralis through the eye to the tym- 

 panum ; another dark-brown stripe on each side of the back ; a few 

 blackish spots on the flanks and on the hind part of the back; hind 

 limbs regularly cross-barred. Male without external vocal sacs. 



E. S, America, 



12. Leptodactylus microtis. 



Oystignathus microtis, Cope, Proc. Anwr. Philos. Soc. xviii. 1870) 

 p. 265. 



Vomerine teeth in two short series behind the choauK. tSjjout 

 nut elongate, without canthus rostralis; jympanum two fifths the 



