The first case of this kind (Pedigree Chart, No. K 5) of +segregation of racial eye-colour+ is that of the offspring from a marriage between a blue-eyed Scotchman and a black-eyed, full blood American Red Indian woman.[F] They had a son and a daughter, and the eyes of both were Indian brown. This brown differs from that of European eyes, and can usually be distinguished by observers who know the two races well. The half-breed son (No. 2, Generation B) married a full blood Indian woman (No. 1), who also had Indian brown eyes, and by her had four children. Two of them were babies at the time my informant knew them, and we may leave them out of account. The other two, a son and daughter (Nos. 2 and 1, Generation C), had Indian brown eyes. This result is in accord with Mendelian expectations. [Footnote F: This is the same family as Family 5 described in connection with Segregation of Nose Form in exhibit K 2a.] The half-breed Indian daughter (No. 4, Generation B) of the blue-eyed Scotchman and Indian mother married a Welshman (No. 5, B) with hazel eyes. They had seven children. Of these, two--a son and daughter (No. 7 and 11, Generation C)--had blue eyes. The remaining children--with the exception of a baby, whom my informant had seldom seen--had eyes of varying shades of brown. Two (Nos. 9 and 12, C) had European brown, one dark Indian brown, and one Indian brown eyes (Nos. 8 and 10, C). The re-appearance of blue eyes among two of the Scotchman's grandchildren is a clear example of the Mendelian segregation among the gametes of the half-breed Indian mother of the factors which produce blue eyes. The Welsh father, with the hazel eyes, must, of course, as we deduce from other cases, have carried the blue-eye factors recessive. The black-eyed full blood Indian grandmother also carried various shades of Indian brown, recessive to the Indian black which she herself manifested, since her daughter and two granddaughters exhibited Indian brown and dark Indian brown coloured eyes. The two European brown-eyed grandsons were probably in eye-colour hybrids between the hazel colour of the Welsh father and the Indian brown of the half-breed Indian mother. The pedigree is thus, in respect of eye-colour--and of other characters also which are not here described--clearly Mendelian in its manifestations. It shows that the offspring of two very different types of human races exhibit the same mode of Mendelian inheritance as do the descendants of two contrasted parents of the same race. [Sidenote: K 6]