120 



REPTILES AND 



[CH. II 



slightly altered from the original, indicates the regions 

 of Sclater and Wallace with the principal sub-regions, 

 i.e. (a) Madagascar, (b) Malaya, (c) Patagonia, (d) New 

 Zealand. 



The wavy lines connecting certain of the regions show 

 that they are related. This method (which I have 

 already utilised) is useful for indicating the range of 

 species, genera or families, the names of which can be 

 written in the spaces ; but it is more particularly 

 advantageous for a broad survey of the divisions of 

 the earth's surface which a study of different groups 

 necessitates and which may be compared. The following- 

 are Trouessart's schemes of herpetological and mammalian 

 regions. 



REPTILES 



Nearctic 



Neotropical 



Palaearetic 



Oriental 



Ethiopian 



Australian 



