28o Maine; agricultural exp^rimknt station. 1912. 



end as a blind sack. Although detailed anatomical data are 

 lacking, there can be little doubt, I believe, because of both the 

 physiological fact of absence of oestrus and the lack (?) or 

 minute, infantile condition of uterus and Fallopian tubes, that 

 these two supposed female individuals were really free-martins. 



6. Color Inheritance in the Triplets. The coat color and 

 pattern exhibited by these triplets are matters of considerable 

 interest. The essential points in regard to color inheritance in 

 this case are: 



(a) That the two females were not at all like the male in 

 either color or pattern. They were of the Hereford type of 

 color and pattern, while the bull was of the Guernsey color and 

 pattern. 



(b) While the two females were in general alike in coat 

 color and pattern they Avere very far from being identical. Es- 

 pecially as they grew older they came to differ quite consider- 

 ably in color. From the beginning they were distinctly differ- 

 ent in pattern. 



The sire and dam of these triplets were both grade animals 

 of very mixed ancestry. This makes impossible any attempt to 

 interpret precisely the color inheritance. It is possible, however, 

 by making one or two not improbable assumptions to reach a 

 simple Mendelian interpretation^^ of the inheritance of color and 

 color pattern in these triplets. Such an interpretation can be, 

 of course, only hypothetical, but it is not without interest. 



The' most striking difference between the sire and dam 

 in regard to color pattern is that the sire had the Here- 

 ford white face, and the dam did not. The Hereford white 

 face is known to be dominant over colored face. From 

 the data regarding the breeding of the sire it is reasonable to 

 suppose that he was heterozygous with reference both to head 

 pattern, and to coat color (cf. p, 274 supra). The case re- 

 garding the dam is not so clear. From the meager data 

 available in regard to her calves born before the present trip- 

 lets (z'ide Table i.) it seems probable that with regard to 



^^The essential features of this interpretation were first suggested to 

 the writer by Mr. W. J. Spillman, in the course of some correspond- 

 ence in regard to the case. 



