iv ALTERATIONS THROUGH DOMESTICATION 167 



and even among domesticated animals, compared with 

 one another, there are marked differences. 



Cornevin shows that this period in the cow varies 

 in length from 288 to 277 days, a difference of eleven 

 days. The following table gives details : 



Cows. Length of Gestation, in days. 



Schwytz 28875 



Freiburg 287*50 



Auvergne 286 



Tarentese 282 



Flemish 280 



Durham 280 



Valais 279-65 



Jersey 279-40 



Ayr 279 



Dutch 279 



Breton 277 



The same is observed among sheep, according to 

 Nathusius and others. 



Merino 150*3 



Southdown 144*2 



Southdown Merino 146*3 



| Southdown I45'5 



Southdown 144*2 



It seems useless to do more than point to the 

 modifying influence of domestication. While we must 

 assume that domestic animals were not specially 

 created for man, and that, as palaeontology, zoology, 

 and anthropology show, they have been evolved by 



