6 ARKIV FÖR ZOOLOGI. BAND 2. N:0 20. 



plicata with its broad and blunt toes and slightly notched 

 membrane, which reaches as far as the tips of the toes. 



The table belovv, giving average measurements in other 

 respects as well, shows that the difference in length we find 

 in the 4th toe of the two species does not exist in the other 

 toes. Further, it appears that also the front Hmbs are more 

 developed in R. cequiplicata, as also the nose is longer, the 

 eyes greater, and the head broader than in R. mascareniensis. 

 Briefly, Råna cequiplicata is a stronger and stouter form than 

 R. 'tnascareniensis. 



Total length . 



Length of 1st toe in ''o of that of body .... 



Length of 2d toe in *^,o of that of body .... 



Length of 3rd toe in ^Jo of that of body .... 



Length of 5th toe in ^Iq of that of body .... 



Length of humerus in *^/o of that of body . . . 



Length of forearm in ^Jq of that of body . . . 



Distance of tympanum from tip of the nose in 

 •^/o of length of body 



Diameter of eye in "/o of length of body . . . 



Breadth of head in ^ o of length of body . . . 



The colour is also different at least in these west-african 

 examples, the groundcolour in R. cequiplicata being much 

 more light brown than in R. mascareniensis, where it is more 

 greyish black. 



A comparison between differently-sized specimens of R. 

 cequiplicata (of R. ynascareniensis I could not get any yoimg 

 examples) shows, as appears by the following table, that there 

 exists in some respects a great difference between the juve- 

 nile and the adult stage. The extremities are considerably 

 shorter in the young ones, but the nose and the eyes as well 

 are longer, while the breadth of the head is nearly the same 

 in all specimens. The web is also less developed in young 

 specimens than in adult ones. 



Furthermore, in the juvenile sta te the throat and the 

 chin are bright chocolate coloured with an white median line 

 and light markings on the margin of the lower lip; most pro- 



