L. GABR. ANDERSSON, BATRACHIANS FROM CAMEROON. 13 



in many entirely liglit-coloured as in most of the females, 

 of which only one has tlie throat marked with small brown 

 spöts. 



An externa! distinction between the sexes that seems to 

 be constant is, however, several longitudinal folds on the 

 sides of throat of the males, which are absent in the females, 

 a distinction clearly depending on the presence of vocable 

 sacs in the former. 



Moreover, in both the sexes we find small pinhea d-like 

 tubercles on the throat, being especially in some males very 

 distinct. In a few, however, both of males and females these 

 tubercles are but slightly visible. 



Except above mentioned sexual distinction there are no 

 such to be found; on the contrary, as shown by the average 

 table, the sexes are very much alike in respects examined. 



All the specimens are nearly of the same size, the length 

 of the body varying between 30 and 35 mm. Only one, a 

 female, is as small as 22 mm. 



Arthroleptis. 



Among 39 specimens which in this collection belong to 

 this genus three or possibly four species are represented, 

 namely A. variahilis Matschie, A. macrodactylus Boul., and 

 A. calcaratus Peters. A fourth form, represented by two spe- 

 cimens, does not quite agree with any description of Arthro- 

 leptis-sipecies, I have been able to find out in literature; but 

 on the other hand, the differences being in my thought not 

 sufficiently great to establish a new species, I have ranged 

 it under A. variahilis as vari e tas tuberosa. 



