c. Terminal phalanges simple, pointed, or with very small discs. First finger opposed to the others .......... Pseudis, p. [213].
d. Terminal phalanges simple, without discs.
α. Tympanum hidden. A large, flat gland on each side of the body .......... Cyclorhamphus fuliginosus, Brazil.
β. Tympanum distinct. Head rough, entirely bony. .......... Calyptocephalus, p. [215].
γ. Tympanum hidden or absent. Tongue roundish, not nicked, free behind. Toes webbed. .......... Telmatobius, 6 species in Western South America.
δ. Tongue heart-shaped, free. Toes webbed. .......... Ceratophrys, p. [215].
ε. Tongue round, free behind. Toes webbed. With two tooth-like projections in the lower jaw. .......... Lepidobatrachus, p. [218].
ζ. Tongue entire, or slightly nicked, free behind. Toes free. .......... Borborocoetes, 11 species in Western South America.
η Tongue entirely adherent Tympanum distinct. .......... Zachaenus parvulus, Brazil.
B. Metasternum with a bony style.