L. GABR. ANDERSSON, BATRACHIANS FROM CAMEROON. 15 



limhs mid nose longer, the latter being aboui 16 "/o of the length 

 of the body, tvhilst in the typical form its highest percentage is 

 14. The colonr (at least in these two specimens) brown with 

 feebly developed dark markings along the middle of the back; a 

 dark spöt above the tympanum; limbs cross-barred ; beneath uni- 

 form light. 



There is hovvever another species, A. poecilonotiis Peters, 

 with which this form just as well might be connected, and 

 with which I identified it at first on account of the key of 

 examination in Boulenger's Catalogue of Batrachia. »Toes 

 very sligtly webbed, nearly free, skin with tubercles or warts 

 above, a single metatarsal tubercle, and a fold along the 

 sides of the body» are all characters which we find in these 

 two specimens. A closer study of the descriptions of the two 

 species, A. variabilis and A. poecilonotus, however, made me 

 doubtful about their being distinct species. A lateral fold is 

 very prominent also in many variabilis-specimens, and as re- 

 gards the different appearence of the dorsal skin, this one, 

 according to Peters \ in A. poecilonotus »erscheint im All- 

 gemeinen glatt», only on a closer examination »sieht man 

 zerstreute kleine Granula». 



What remains there then as structural difference between 

 the two species, and how are we able to distinguish the south- 

 african A. tvahlbergii from these ones? Those are questions 

 that may be decided by a future revision of the genus Ar- 

 throleptis. 



Arthroleptis macrodactylus, first described by Boulenger 

 in Batr. sal. p. 117 and characterized by its very long third 

 fijiger, is represen ted in this collection by two specimens. In 

 both the third finger is exceedingly long, a condition which, 

 as appears by the table below, to some extent may be said 

 to exist elsewhere in the före limbs as well, but in other re- 

 spects the two specimens show a rather different external 

 appearence, the colour being different and, as mentioned be- 

 fore, the one having distinct tubercles on the back. the other 

 being quite smooth. 



According to previously given descriptions the species A. 

 mxicrodactylus is characterized by smooth skin, wherefore one 

 of these specimens ought not to be reckoned as belonging 



' Akademie d. Wissensch. Berlin 1863. Bd. 28. p. 44C. 



