13. LEPToDACTYLUS.—14. PLECTROMANTIS. 249 
19. Leptodactylus gaudichaudii. 
? Limnocharis fuscus, Giinth. Cat. p. 28. 
Crossodactylus gaudichaudii, Giinth. 1, c. p, 90. 
Crossodactylus gaudichaudii, Dum. § Bibr. p.90; Hensel, Arch. f. 
Naturg. 1867, p. 149; Steindachn. Verh. xool,-bot. Ges. Wren, 
1865, p. 499. 
? Limnocharis fuscus, Bell, Zool. Beagle, Rept. p. 33, pl. 16. f. 3. 
Tarsopterus trachystomus, Reinh. § Lith, Vidensk. Meddel. 1861, 
Dalae,: ple erence 
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 ; subarticular 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 discoidal 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, 3. Lagoa Santa. Prof. Reinhardt [P.]. (As typical of 
Tarsopterus trachystomus. ) 
Pb. gy very Rio Janeiro. C. Darwin, Esq. [P.]. (Type of 
bad state. Limnocharis fuscus.) 
14. PLECTROMANTIS. 
Plectromantis, Peters, Mon. Berl, Ac. 1862, p. 252; Cope, Journ. Ac. 
Philad. (2) vi. 1866, p. 97. 
Pupil horizontal. Tongue oval, slightly emarginate, and free 
behind. Vomerine teeth behind the choane. 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. 
