10. AETHEOLEPTIS. 11. EAPPIA. 119 



8. Arthroleptis ? africanus. 



Heteroglossa africana, Gibith. Cat. p. 26. 

 Heteroglossa africana, Halloio. 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 Trebbed ; disks of fingers and toes very small. Skin 

 smooth above and beneath. Dark browu 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., TscJmdi, Batr. p. 35 ; Diim. ^- Bibr. viii. p. 525. 

 Hvperolius, sp., (wo« Gray) Rapp, Arch. f. Naturg. 1842, p. 289 j 



"G'unth. Cat. p. 85 ; Cope, Nat. Hist. Rev. 18G5, p. 116. 

 Eappia, sp., Giinth. Zool. Pec. i. p. 130. 



Pupil horizontal. Tongue heart-shaped, free behind. Yomerine 

 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 Zr-oZiw, which it represents in the -ililthiopian 

 Eegion, 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 Rappia those species only that have the pupil 

 transverse ; those with erect j)upil I unite under Megalixalus. 



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 HiiperoJius, given by llapp on account of Eucnemis 

 being preoccupied, has been changed by Dr. Giinther into Rappna, 

 Gray having several j-ears before Eapp 7iamed a geaus of Frogs 

 Uperoleia, the correct spelling of which would be Hijperolius. 



* 1. Eucne'inis virijlavus, Dum. & Bibr. p. 52S. — Abyssinia. 



2. Hyperolius jlavoviridls, Peters, Arch. f. Xaturg. 1855, p. 56. — Mo- 

 zambique. 



?>. Hi/per oUus tettensis, Peters, J. c— Mozambique. 



4. Eucmmis hctsileo, Grar.did. Ann. Sc. Xat. (5) xv. 1872. — Madagascar. 

 b. Eucnemis antanosi, Grandid. /. c. — 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 Eappia. 



