24:6 CYSXIGNATHIDiE. 



Skin smooth, or with small warts above ; a glandular lateral fold 

 from the eye to the groin ; sometimes a second below it, from the 

 tympanum' to the middle of the side ; a ventral discoidal fold. 

 Erown or olive above, with more or loss distinct darker markings ; 

 generally an angular dark spot on the occiput ; a dark stripe from 

 the tip of the snout along the canthus rostralis through the eye to 

 the shoulder ; limbs cross-barred ; hinder side of thighs dark brown, 

 with a more or less distinct white stripe ; beneath immaculate, or 

 more or less dotted with brown. Male with two internal vocal sacs ; 

 thumb without spine-like tubercles. 

 "W. Indies ; Mexico. 



a-c, d-g, h-l. c? , 2 , & yg- St. Thomas. Mr. Eiise [C.].(Types.) 



m. Several spec. : d > ? > Sta. Cruz, W. Indies, A. Newton, Esq. [P.]. 



hgr., & yg. 



n. $. Tehuantepec. Brussels Museum [E.l. 



0. 6. ? 



15. Leptodactylus typhonius. 



Cystignathus gracilis, Giinth. Cat. p. 28. 

 Eana typhon'ia, Daud. liain. p. 55, pi. 17. f. ?>, 4, and Repi. viii. 



p. 100, pi. 05. 

 mystacea. Spur, Test. Ran. p. 27, pi. 3. f. 2, .3 ; Peters, Mon. BerJ. 



Ac. 1872, p. 201. 



sibilatrix, Wied, Beitr. Katurg. Bras. i. p. 515, andAhbild. 



Leptodactylus typhonius, Fifzing. Class. Rept. p. 64. 



sibilatrix, Fitzing. I. c. 



Cystignatluis ocellatus, part., Tschidi, Batr. p. 78. 



typhonius, Dum. S,- Bihr. p. 402; Reinh. Sf Liitk. Vidensk. 



Meddel. 1861, p. 161 ; Stemdachn. Novara, Amph. p. 24 ; Peters, 



Mon. Berl. Ac. 1876, p. 709. 



schomburgkii, Troschel, Schomh. Reisen Guiana, iii, p. 659. 



-graeU i o , H e ns ely-Wie-gm.^Ar^.\Q^,~^r\2f^. • 



Tongue oval, nicked behind. Vomerine teeth in two arched series 

 behind the choanse. Snout acuminate, prominent, longer than the 

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

 the eye ; interorbital space narrower than the upper eyelid ; tym- 

 panum two thirds the mdth of the eye. Eingers moderate, first 

 much longer than second ; toes moderate, not fringed : subarticular 

 tubercles well developed ; two small metatarsal tubercles, the outer 

 very indistinct. The hind limb being carried forwards along the 

 body, the tibio-tarsal articulation reaches the eye, or somewhat be- 

 yond. Skin with distinct longitudinal folds on the back ; a ventral 

 discoidal fold. Olive above, with dark regular spots ; sometimes a 

 light vertebral stripe : limbs cross-barred ; hinder side of thighs 

 black-and-white marbled. Male with a black external vocal sac on 

 each side of the throat ; thumb without spine-bearing tubercles. 



E. S. America. 



c. 2 . St. Marthe. 



b-d. (S. Para. E, Graham, Esq. [P.]. 



