L. GABR. ANDERSSON, BATRACHIANS FROM CAMEROON 



through tlie following table, sliowiug the average measure- 

 ments of the different parts of the hind limb in percentage 

 of the length of the body. 



Total length 



Length of the thigh in ^.q ot that of the l:>odj^ . 



Length of the tibia in ^/o of that of the body . 



Length of the tai'sus in ''o of that of the body 



Length of the foot with 4th toe in " ^ of that of 

 the body 



Length of the foot in "/o of that of the hind limb 



(the foot excepted) 36.8 



42. 



The average measurements in this table are based on 

 12 specimens of R. cequvplicata and 12 of R. mascareniensis, 

 varying in length from 35 mm. to 56 mm., in both species 

 as much as possible representing the same stages of develop- 

 ment. All the specimens measured are from West-Africa. 



Looking at the table we find that in Råna cEquij)licata 

 the thigh and the tibia are very much longer than in R. 

 mascareniensis while the foot is con- 

 siderably sh orter, differences well 

 marked by the different average 

 measurements of length of foot in 

 "/u of that of other parts of limb 

 (viz. 36,8 and 42.:). It ought to 

 be expressed as follows: In Råna 

 cequi/plicata the foot with the 4th toe 

 does not come n/p to 40 ^'/o of the rest 

 of the limb (in specimens measured 

 varying between 34,:>. and 39,2), m r. mascare- 

 R. mascare7iiensis this measurement °^^°^^^ 

 is more than 40 "/o (in specimens measured varying between 

 41,3 and 45, i). 



The present figures show the typical shape of the foot 

 in the two species. The slender toes with their acuminate 

 tips and deeply emarginated web in R. mascareniensis give 

 this foot quite anotlier appearance than the foot of R. cequi- 



