13. lEPTOBACTTLTTS. 14. PLECIEOMANTIS. 249 



19. Leptodactylus gaudichaudii. 



? Limnocharis fuscus, GUnth. Cat. p. 23. 

 Orossodactylus gaudichaudii, Oiirdh. I. c. p. 90. 

 Orossodactylus gaudichaudii, Dum. 8f Bibr. p. 90 ; Hensel, Arch. f. 

 Nabwrg. 1867, p. 149: Steindaahn. Verh. zool.-bot. Ges. Wien, 

 1865, p. 499. 

 P Limnocharis fuscus, Bell, Zool. Beagle, Sept. p. 33, pi. 16. f. 3. 

 Tarsopterus trachystomus, Seinh. %■ Liith. Vmensk. Meddel. 1861, 

 p. 177, pi. 3. f. 2. 



Vomerine teeth none (sometimes present, according to Hensel). 

 Tongue oval, entire. Snout rounded, as long as the greatest orbital 

 diameter ; nostril equally distant from the eye and the tip of the 

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

 two thirds the width of the eye. Fingers moderate, with slightly 

 swollen tips, first not extending beyond second; toes moderate, 

 margined with a broad membrane, the tips dilated into small disks ; 

 a broad membranaceous fold along the inner edge of the tarsus ; 

 two very prominent metatarsal tubercles, the inner oval, the outer 

 rounded ; subartioular tubercles small. The hind limb being car- 

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

 the eye. Skin smooth or slightly glandular ; a fold from the eye to 

 the shoulder ; no ventral disooidal fold. Olive above ; limbs indis- 

 tinctly cross-barred. Male without vocal sac, with two small spines 

 on the inner side of the first digit. 



Brazil. 



a. c?. Lagoa Santa. Prof. Reinhardt [P.]. (Astypicalof 



Tarsopterus traohystomus.) 

 ?b. cJjVery Rio Janeiro. 0. Darwin, Esq. [P.]. (Type of 



bad state. Limnocharis fuscus^ 



14. PLECTROMANTIS. 



Plectromantis, Peters, Man. Berl. Ac. 1862, p. 282; Cope, Journ.Ae. 

 Phikid. (2) vi. 1866, p. 97. 



Pupil horizontal. Tong-ue oval, slightly emarginate, and free 

 behind. Vomerine teeth behind the ohoanse. Tympanum distinct. 

 Fingers and toes free, the tips of the latter, .or of both, dilated into 

 regular disks. Outer metatarsals united. Omosternum cartilagi- 

 nous ; xiphisternum with a bony style. Terminal phalanges T- 

 shaped. 



Western South America. 



Future researches may prove this genus not to be separable from 

 Leptodactylus. 



