120 BLASTOGENIC VARIATIONS. 



hair peculiar to the breed, and were true albinoes, like 

 their Angora parents. They also possessed the char- 

 acteristic habit of slowly swaying the head from side to 

 side when they looked at one. Both of the Angora 

 young were born bigger and stronger than any of the 

 other young, and they all along maintained their su- 

 premacy in this direction. Heape could observe no 

 sign in the Angora young of any Belgian hare strain, 

 and the Belgian hare young showed no likeness to their 

 foster-brothers. 



In a subsequent paper,* Heape records another suc- 

 cessful experiment. In this a Belgian hare doe was 

 covered by a Belgian hare buck, and shortly after the 

 segmenting ova obtained from a Dutch doe which had 

 been covered by a Dutch buck twenty-four hours pre- 

 viously were transferred to her fallopian tube. The 

 Belgian hare doe gave birth to seven young, of which 

 five Avere Belgian hares, and two very irregularly 

 marked Dutch. It was found, however, on putting the 

 same Dutch buck which had been used in this experi- 

 ment to a thoroughbred Dutch doe, most, if not all, of 

 the litter resulting were as badly marked as the Dutch 

 foster-children. Hence it is not necessary to suppose 

 that the foster-mother was the cause of the irregularity. 

 From this and other evidence Heape considers he is 

 justified in concluding that the uterine foster-mother 

 exerts no modifying influence upon her foster-children, 

 in so far as can be tested by the examination of a single 

 generation. Romanes t has however remarked, that 

 inasmuch as rabbits, when crossed in the ordinary way, 



*Proc. Roy. Soc., Ixii. p. 178, 1897. 



f "Darwin and after Darwin," vol. ii. p. 146. 



