562 IIR. F. DAT OX THE GEO&RAPHICAL 



of 73' genera present in the Hindustan and Ceylonese subregions, 

 we find them thus distributed^ : — 



73 genera, where distributed. 



Acanthopterygii. 



8^ 



Scombresocidae. 



a 

 o 

 ns 

 o 

 a 

 fi 

 &i 



o 



Cyprinidas. 



Notopteridae. 



Symbranchidae. 



Hindustan, Ceylon,Burmah to Malay 



















9 



8 



1 



1 



10 



1 



3 



Hindustan and Ceylon subregions... 



1 















1 











to 



















1 



1 











6 











Hindustan subregion 







4 







1 



2 











„ ,, to Burma or 



















4 



7 











5 













1 















1 











„ „ to Burma or 



















4 



1 























Out of the foregoing 73 genera of freshwater fishes which are 

 found in the Hindustan and Ceylonese subregions, no less than 

 62 extend to Burma or the Malay archipelago, or to both ; 

 whereas only 15 are common to the Palaearctic region. Thus we 

 not only observe the comparatively small amount of the Ethio- 

 pian element in the Indian fish-fauna, but also find that (exclu- 

 ding the Himalayan forms) the ichthyology of India and Ceylon 

 is far less Palaearctic than it is Malayan. 



The Oriental genera (excluding the Himalayan) which are 

 distributed more or less through its subregions of Hindustan, 

 Ceylon, Burma and Siam, and the Malay archipelago, but possess 

 neither Ethiopian nor Palaearctic representatives, are as follows : — 

 1. Nandus, 2. Pristolepis, 3. Sicydium, 4. Ophiocephalus, 5. Channa, 

 6. Anabas, 7. Poly acanthus, S. Osphromenus, 9. Liocassis, 10. Pan- 

 gasius, 11. Pseudeutropius, 12. Callichrous, 13. Wallago, 14. Chaca, 

 15. Bagarius, 16. Glyptosternum, 17. Homaloptera, 18. Cirrhina, 



^ The Burmese and Himalayan genera which are not common to Hindustan 

 are omitted. 



2 It is to be regretted that, with the exception of some portions of the Hima- 

 layas and the western Ghauts of India, the hill-ranges scattered over Hindustan 

 have not had their fishes sufficiently collected. H. D. Thomas, Esq., of the 

 Madras Civil Service, has lately sent me a collection made on the Sheverry 

 hills in Madras ; and they are identical with those of the neighbouring 

 plains. 



