538 THE AMEBIC AN NATURALIST [Vol. XLV 



studying most of the other groups of animals. Faunis- 

 tic differences comparable to these which we have here 

 mentioned for the Indian archipelago are naturally- 

 found in other regions of the world. It is not long ago 

 that zoologists gave little or no consideration to these 

 phenomena of distribution, but simply busied themselves 

 with describing hundreds of new species without caring 

 whence these species came. It was only at the beginning 

 of the nineteenth century that a change came about. 



