Toes webbed .......... Trichobatrachus robustus, p. [271].
Toes free, with sharp claws .......... Gampsosteonyx batesi, p. [272].
B. Without vomerine teeth. Discs well developed. Outer metatarsals united. Tropical Africa and Madagascar, 7 species .......... Megalixalus.*
II. Pupil horizontal.
A. With vomerine teeth.
a. Outer metatarsals webbed together.
Fingers free, toes webbed .......... Rana, p. [249].
Fingers and toes more or less webbed. Always with discs .......... Rhacophorus,* p. [245].
Two fingers opposed to the others. Africa .......... Chiromantis,* p. [244].
b. Outer metatarsals united, or separated by a groove only.