APPENDIX. 175 



mule in the first instance, and, as in the well-known cases 

 of mai-es which have been mated with qaaggas and zebras, 

 her subsequent progeny, when mated with a horse, shows 

 some trace of the first union. The late M. Ayrault, and 

 most persons who are really cognizant of the matter, 

 regard this animal not as a mule but as an ordinary mare. 

 ... It would appear most probable that this is not a case 

 of a fertile mule breeding ; but that the animal is really 

 an ordinary mare, whose female parent was influenced by 

 a first alliance, as is so often the case in dogs and other 

 animals."* 



From these quotations it may be assumed (1) that 

 Tegetmeier and Sutherland believe in telegony in "the 

 case of dogs and other animals," and that it most probably 

 occurs also in horses, and (2) that Captain Hayes (who 

 probably expresses the views of the majority of veterina- 

 rians) takes for granted that telegony occurs in horses as 

 well as in other animals. 



The views held by biologists, breeders, and others in- 

 terested in the question of telegony having been shortly 

 stated, I shall now indicate some experiments that might 

 at the outset be started. Granting that infection of the 

 germ is possible, various questions at once arise. Is it, as 

 believed by Romanes, extremely rare, or is it, as asserted by 

 many breeders, of common occurrence ? It is conceivable 

 that it may be of common occurrence, but owing to in- 

 breeding and other causes the results in the majority of 

 cases may be completely or all but completely obscured. 



In planning experiments it will, I think, be well to take 

 for granted that if telegony occurs at all it occurs fre- 

 quently, and that in order to demonstrate the influence of 

 the first sire it is only necessary to select suitable subjects. 



Judging by the cases already reported which seem to 

 support the belief in telegony, it will be desirable to, in 

 the first instance, operate with either different species or 

 well-marked varieties of the same species, and then mate 

 the females which have bred to the new species or distinct 



* Ibid., pp. 81 and 82. 



