10. ARTHROLEPTIS.—11. RAPPTA. 119 
8. Arthroleptis ? africanus. 
Heteroglossa africana, Giinth. Cat. p. 26. 
Heteroglossa africana, Hallow. Proc. Ac. Philad. 1857, p. 64; Cope, 
Proc. Ac, Philad. 1862, p. 343. 
Head nearly as long as the body ; tympanum distinct. Toes very 
distinctly webbed; disks of fingers and toes very small. Skin 
smooth above and beneath. Dark brown or chocolate above, min- 
gled to a slight extent with ash; posterior extremities cross-barred ; 
abdomen ash-coloured ; chin and throat chocolate-spotted ; under 
surface of extremities blackish, mingled with ash. 
Gaboon. 
11. RAPPIA*, 
Eucnemis, sp., Tschudi, Batr. p, 35; Dum. § Bibr. viii. p. 525. 
Klyperolius, sp., (non Gray) Rapp, Arch, f. Naturg. 1842, p. 289; 
Gunth, Cat. p. 85; Cope, Nat. Hist. Rev. 1865, p. 116. 
Rappia, sp., Giinth. Zool. Rec. i. p. 130. 
Pupil horizontal. Tongue heart-shaped, free behind. Vomerine 
teeth none. Tympanum distinct or hidden. Fingers and toes more 
or less webbed, the tips dilated into large disks. Outer metatarsals 
united. Omosternum and sternum with a bony style, Terminal 
phalanges obtuse. 
Tropical Africa. 
This genus differs from Javalus, which itrepresents in the Authiopian 
Region, by the absence of a groove or web between the outer meta- 
tarsals and by the generally less deep emargination of the tongue. 
The species hitherto referred to this genus show two different forms 
of pupil; and I have, on account of this, split them into two genera, 
maintaining under Lappia those species only that have the pupil 
transverse ; those with erect pupil I unite under Megalivalus. 
A considerable number of species have been established upon 
coloration only. But coloration is not of specific importance in 
Frogs, and I therefore have united all those forms that are not dis- 
tinguished by any structural character. 
The name Hyperolius, given by Rapp on account of Hucnemis 
being preoccupied, has been changed by Dr. Giinther into Rappia, 
Gray having several years befcre Rapp named a genus of Frogs 
Uperoleia, the correct spelling of which would be Hyperolius. 
* 1. Eucnemis viriflavus, Dum. & Bibr, p. 528.— Abyssinia. 
2. Hyperolius flavoviridis, Peters, Arch. f. Naturg. 1855, p. 56. — Mo- 
zambique. 
3. Hyperolius tettensis, Peters, 1. c.—Mozambique. 
4. Eucnemis hetsileo, Grandid. Ann. Sc. Nat. (5) xv. 1872.—Madagascar. 
5. Hucnemis antanost, Grandid. /. e.—Madagascar. 
The shape Of the pupil not having been noticed by the authors, these species 
may as well belong to the following genus as to Rappia. 
