10. AETHEOLEEIIS. 11. EAPPIA. 119 



8. Arthroleptis ? africanus. 



Heteroglossa africana, Gunth. Cat. p. 26. 

 Heteroglossa africana, Sallow. Proc. Ac. PhUad. 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. 8/- Btbr. viii. p. 525. 

 Hyperolius, sp., {non Gray) Papp, Arch. f. Natwrg. 1842, p. 289 ; 



Ounth. Cat. p. 85 ; Cope, Nat. Hist. Pev. 1865, p. 116. 

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



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

 teeth none. Tympanum distinct or hidden. Kngers 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 JraZMs, which it represents in the jEthiopian 

 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 Bappicc those species only that have the pupil 

 transverse ; those with erect pupil 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 Hyperolius, given by Eapp on account of Eucnemis 

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

 Gray having several years before Eapp named a genus of Erogs 

 Uperoleia, the correct spelling of which would be Hyperolius. 



* 1. Eucnemis viriflavus, Dura. & Bibr. p. 528. — Abyssinia. 



2. Hyperolius fiavoviridis, Peters, Arch. f. Naturg. 1855, p. B6. — Mo- 

 zambique. 



3. Hyperolius tettensis, Peters, I.e. — Mozambique. 



4. Eucnemis hetsileo, Grandid. Ann. So. Nat. (6) xv. 1872. — Madagascar. 



5. Eucnemis anianosi, Grandid. /. c. — Madagascar. 



The shape of tlie pupil not having been noticed by the authors, these species 

 may as well belong to the following genus as to Sappia. 



