~~ 
238 OYSTIGNATHID&®. 
dilated at the tips. Outer metatarsals united. Omosternum carti- 
laginous ; sternum with a bony style. Terminal phalanges simple. 
Tropical America. 
UL 
Sternal apparatus of Leptodactylus pentadactylus. 
Synopsis of the Species. 
I. Toes without distinct dermal margins. 
1. Tongue regularly heart-shaped. 
Tympanum half the width of the eye . 1. pustulatus, p. 239. 
Tympanum two thirds the width of the 
eye; tibio-tarsal articulation not reach- 
ime the eyOn.. is foes «ten eet 2. rhodonotus, p. 239. 
2. Tongue oval or elliptic, entire or slightly nicked behind. 
A. Tips of toes dilated into small but distinct disks. 
Tibio-tarsal articulation reaching the eye 3. hyledactylus, p. 240. 
B. Tips of toes not dilated. 
a, Tibio-tarsal articulation reaching the tip of the snout. 
Tympanum two thirds the width of the 
eye; vomerine teeth in two slightly 
anchéd Series -.:.. senate « seeronaee 4, longirostris, p. 240. 
Tympanum two thirds the width of the 
eye ; vomerine teeth in a long scarcely 
anterrupbed. series... =... oi. kee eee 5. gracilis, p. 241. 
Tympanum nearly as large as the eye; 
vomerine teeth in two arched series.. 6. fragilis, p. 241. 
Two glandular folds on each side of the 
back, the latter ending in a large flat 
eiand on the Svoil., iou4) akan ae 7. labrosus, p. 241. 
