I860.] 



Proceedings of the Asiatic Society. 



431 



b. becoming subsequently di- 

 versified according to climate. 



3. New forms of life could not 

 have arisen from those preceding 

 them, but were provided for by 

 a new creation. (Schopfung). 

 The assumption of specific and 

 generic centres, is therefore un- 

 necessary and improbable. 



4. As the older forms disap- 

 peared, in consequence of the 

 cooling of the earth and the 

 formation of continental areas, 

 they were continuously replaced 

 by new forms with but a slight 

 variation in the intensity of the 

 producing force. 



5. The general character of the 

 first fauna and flora was entirely 

 different from that of the present 

 day, the passage being, however, 

 gradual throughout. 



6. Organisms became more va- 

 ried and respectively adapted to 

 more diversified conditions of life. 



7. The appearance of most 

 plants and animals was condi- 

 tional on the previous fulfilment 

 of the conditions necessary for 

 their existence, as regard nourish- 

 ment, habitat, &c. 



8. The absolute number of 

 species, genera, and families in- 

 creased with the differentiation of 



b. the internal heat being di- 

 minished by radiation, the climate 

 became differentiated in different 

 zones. 



3. The new stations formed 

 were not always in connexion 

 with those previously populated. 



4. The cooling of the earth's 

 surface and the extension of con- 

 tinental land areas proceeded gra- 

 dually and equably. 



5. The physical condition of 

 the earth's surface was likewise 

 originally very different from that 

 of the present day, and the pas- 

 sage gradual. 



6. In consequence of the above 

 change, stations became more 

 numerous and varied. 



7. The Earth, having become 

 peopled with such plants and 

 animals as depended solely on 

 each other and on the purely ter- 

 restrial conditions, was, by their 

 existence, rendered habitable for 

 succeeding races. 



8. The differentiation of the 

 requisite external conditions pro- 

 ceeded continuously, but espe- 



