TABIETIES FROM MODE OF BREEDING. lOi 



islanders are more advanced, and not quite so dark ; 

 several are lighter than olive colour, and hundreds of 

 European faces are found among- them." Indeed the 

 examples are almost endless which I could bring- for- 

 ward to aid my explanations ; but these it would be 

 needless to give, since it is in the power of every one 

 to study the diiFerences in form and features of the 

 classes of society in our own island, and by so doing 

 understand the influence of otherwise trivial and unim- 

 portant circumstances, on an animal at all times so 

 easily moulded to situation as the sheep. 



(86.) Varieties from mode of Breeding Changes 



are wrought for the most part by attention to the mode 

 of propagation of the plant or animal, by the plan of 

 crossing ; and by careful selection of the parent stock. 

 Every one must be struck with the varieties constantly 

 occurring in the vegetable world : Flowers change 

 their colours, and become double ; and these charac- 

 ters can be perpetuated by seed. Hedge-row plants 

 may be observed to vary even in the limits of an ordi- 

 nary walk, and to be continued as varieties so long as 

 they remain in the same locality. The following 

 striking example of the extent to which plants may be 

 made to vary by altering their circumstances, is related 

 by Mr Herbert in the Horticultural Transactions, vol. 

 IV :— " I raised from the natural seed of an umbel of a 

 highly manured red cowslip, a primrose, a cowslip, ox- 

 lips of the usual and other colours, a black polyanthus, 

 a hose-in-hose cowslip, and a natural primrose bearing 

 its flower on a polyanthus stalk. From the seed of 

 that very hose-in-hose cowslip, I have since raised a 

 hose-in-hose primrose. I therefore consider a\l these 



