10. ARTHROLEPTIS. 11. KAPPIA. 119 



8. Arthroleptis ? africanus. 



Heteroglossa africana, Giinth. Cat. p. 26. 

 Heteroglossa africana, Hallo^v. Proc. Ac. Pliilad. 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. Skiu 

 smooth above and beneath. Dark brown or chocolate above, min- 

 gled to a slight extent with ash ; posterior extremities cross-barred ; 

 abdomen ash-colonred ; chin and throat chocolate-spotted ; under 

 surface of extremities blackish, mingled with ash. 



Gaboon. 



11. RAPPIA*. 



Eucnemis, sp., TscJiudi, Batr. p. 35 ; Diim. S,- Bibr. viii. p. 525. 

 Hyperolius, sp., {mm Gray) Eapp, Arch. f. Naturg. 1842, p. 289; 



Giinth. 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. Eingers 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 /.rrt/ws, which itrejiresents in the Ethiopian 

 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 Rappia 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 onlj'. 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 chai-acter. 



The name Jli/jjeroUus, given by Eapp on account of Eucnemis 

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

 Gray having several years before Rapp named a genus of Frogs 

 Uperoleia, the correct spelling of which would be Hyperolius. 



* 1. Eucnemis virijlavus, Dum. & Bibr. p. 528. — Abyssinia. 



2. Hyperuliiis flavoviridis, Peters, Arch. f. Jsaturg. 1855, p. 56. — Mo- 

 zambique. 



3. Hypcrrjliiis teifensis, Peters, I. c- — Mozambique. 



4. Kuciumis hctiileo, Graiidid. Ann. Sc. Nat. (;')) xv. 1872. — Madagascar. 



5. FAicncmis antanosi, Gi-andid. /. c. — Madagascai-. 



The sbape of the pupil not having been noticed by tho authors, these species 

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



