ORGANIC EVOLUTION— THE FACTORS 127 



from a morpbological point of view, are valueless as 

 reo-ards the matter under discussion, since modern 

 research has rendered it practically certain that it is 

 the nucleus, not the cell-body, that is the bearer of 

 heredity. 



To strengthen the case for the transmission of 

 acquired variations, Mr. Spencer quotes from Lord 

 Morton — 



" I tried to breed from the male quagga and a young 

 chestnut mare of seven-eigliths Arabian blood, and which 

 had never been bred from ; the result was the produc- 

 tion of a female hybrid, now five years old, and bearing, 

 both in her form and in her colour, very decided 

 indications of her mixed origin. I subsequently parted 

 with the seven-eighths Arabian mare to Sir George 

 Ouseley, avIio has bred from her by a very fine black 

 Arabian horse. I yesterday morning examined the 

 produce, a two-year-old filly and a year-old colt. They 

 have the character of the Arabian breed as decidedly as 

 can be expected, where fifteen-sixteenths of the blood 

 are Arabian ; and they are fine specimens of that breed ; 

 but both in their colour and in the hair of their manes 

 they have a striking resemblance to the quagga. Their 

 colour is bay, marked more or less like the quagga in a 

 darker tint. Both are distinguished by the dark line 

 along the ridge of the back, the dark stripes across the 

 forehand, and the dark bars across the back part of the 

 legs" (p. 34). 



Mr. Spencer quotes also the case of a sow, the 

 offspring of which in the second and third litters 

 exhibited traits characteristic of the father of the first, 

 an animal which was' drowned shortly after he had 

 been put to the sow. He then remarks — 



" And now, in the presence of these facts, what are 

 we to say ? Simply tliat they are fatal to Weismann's 



