Experimental Contributions to the Theory of Heredity. 251 



of the others. The dam, a prepotent yellow and white (skewbald) 

 pony, had first of all a light bay foal to an Iceland pony. Her third 

 foal, by a bay Shetland stallion, is a skewbald, and in the size and 

 arrangement of the brown patches closely resembles the dam. There 

 is no hint whatever that the Iceland pony has been "infected" by the 

 zebra. 



Several Irish mares were put to the zebra, and two of them (bays) 

 have first produced hybrids and subsequently pure bred foals. A 

 cream coloured Irish-Canadian mare unfortunately died before her 

 hybrid foal was born. One of the bay mares had a bay hybrid richly 

 striped ; the other a hybrid with but indistinct stripes. The subse- 

 quent foals — one by a chestnut thoroughbred horse (Tupgill), the 

 other by a hackney pony (Mars Royal) — are bays, not only devoid of 

 stripes but affording no indication whatever that their dams had been 

 previously mated with a zebra. 



Although I experimented with seven English thoroughbred mares 

 and an Arab mare, I only succeeded with one, a small chestnut. This 

 mare produced twin hybrids last summer ; yesterday she had a foal to 

 a thoroughbred chestnut horse (Lockstitch). One of the twins died 

 soon after birth, the other, richly but unobtrusively striped, in its 

 colour and make strongly suggests its dam. The chestnut mare's new 

 foal neither in make, colour, nor action in any way resembles a young 

 zebra nor a zebra hybrid. In 1897 a bay mare by a bay Arab horse 

 (Hadeed) was for some months in foal to the zebra. Since she 

 miscarried in 1896 she has had two foals to a thoroughbred horse 

 (Lockstitch). Neither of these foals in any way suggests a zebra. In 

 this case the unused germ cells of the zebra had presumably a better 

 chance of reaching the ovum from which the first of the two pure-bred 

 foals was developed than is usually the case. 



Attempts were made to cross Welsh, Exmoor, New Forest, Nor- 

 wegian, and Highland ponies with the zebra without success, and 

 though a cross-bred Clydesdale has twice had a hybrid, she has not yet 

 produced a pure bred foal. The experiments as far as they have gone 

 afford no evidence in support of the telegony hypothesis. 



VOL. LXV. 



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