148 T. G. Sloane : Fawned Subvegions. 



taken to comprise all that is left of Spencer's Eyrean sub-regiorr 

 after the other four districts treated of above are removed. 



In conclusion, I wish to emphasise the view that such faunal 

 districts are better suited than any political divisions for use by 

 biologists to show the distribution of genera and species. Such 

 districts can be employed to impart a greatly added value to pub- 

 lished lists of species, without adding to their bulk (this being an 

 important consideration in dealing with such an order as the 

 Coleoptera, which requires a large volume for the mere enumeration 

 of the names of its innumerable species). If a map be given with 

 the districts numbered on it, these numbers can be added on the 

 same line as a name of a species in the list without increasing its 

 bulk or price. It is much to be desired that workers in different 

 groups should use the same set of faunal districts, and it is not 

 to be supposed that a system of districts which will commend itself 

 generally to zoologists can be evolved without much study and 

 research. At present I can only feel confident of Tate's Autochtho- 

 nian Region being a surely defined faunal district. 



