IQI2.] N. Annandai^e : Batrachia. 35 



D. Species known from Sikhim and from Assam 



S. of the Brahmaputra . . . . 2= 8% 



E. Species hitherto only known from Assam . . 2= 8% 



F. Species hitherto only known from Burma or 



Burma and Malaysia . . . . 3=12% 



G. Species only known from the Himalayas . . 2= 8% 



Stated in this manner the figures show at a glance how very 

 distinct the Batrachian fauna of the N. E. corner of Assam and 

 the Abor foot-hills is from that both of the Himalayan foot-hills 

 W. of Bhutan and from that of the districts vS. of the Brahmaputra. 

 They also show, however, that there is considerably greater affinity 

 in the latter direction than in the former, and it is by no means 

 improbable that further research among the Batrachia of southern 

 Assam will increase rather than diminish the resemblance. It is, 

 moreover, noteworthy that one of the two purely Himalayan forms 

 {Bnfo himalayanus) represented in Mr. Kemp's collection of frogs 

 and toads is of doubtful validity as a species and that specimens 

 from the Abor hills do not agree in every respect with those from 

 Darjiling. 



Several of the species whose names occupy a place in Mr. 

 Kemp's list were not taken actually in the foot-hills, but in the 

 plains at their base. These species are the following: — Ixalus as- 

 samensis from group G; Rana alticola and R. granulosa from group 

 B, and Rana cyanophlyctis , R. tigrina and Bufo melanosiictus from 

 group C. If we eliminate these names, we get the following num- 

 bers and percentages in the different groups : — 



A. Species apparentlj" endemic in the Hima- 



layan foot-hills E. of Bhutan . . 7=37 % 



B. Species from the Himalayas, Assam and 



Burma . . . . . . 3=16 % 



C. Species of very wide distribution . . i==5'25% 



D. vSpecies from Sikhim and from Assam S. 



of the Brahmaputra .. ,. 2=iO"5% 



E. Species hitherto known only from Assam 2=io'5% 



F. Species hitherto known only from Burma 



or from Burma and Malaysia . . 3=16 % 



G. Species known only from the Himalayas . . i=5'25% 



These percentages, which are calculated roughly, show that 

 the Batrachian fauna of the Abor foot-hills, in so far as it is illus- 

 trated by Mr. Kemp's collection, includes about 37% of apparently 

 endemic species, about 16% of species that also occur both in 

 Sikhim on the one hand and in Burma and Assam on the other 

 and also of species hitherto known from Burma but not frora 

 Assam, about io|% of species not known from Burma but common 

 to the E. Himalayas and Assam and the same percentage of species 

 only known hitherto from Assam, and about 5i% both of widely 

 distributed species and of exclusively Himalayan forms. A true 

 jungle fauna, if the jungle be of the damp equatorial kind, rarely 



