Volume IV 
JUNE, 1905 
NOS. 1 AND 2 
BIOMETKIKA. 
KESULTS OF CROSSING GREY (HOUSE) MICE 
WITH ALBINOS. 
By E. H. J. SCHUSTER, M.A., New College, Oxford. 
The experiments here recorded were commenced in the department of 
comparative anatomy in Oxford in the autumn of 1902, but various personal 
circumstances have delayed the publication of any account of them for more than 
a year after their completion. 
They were made at the suggestion and with the advice and help of Professor 
Weldon, and I have therefore numerous reasons for thanking him. 
Source of Material. 
The original stock of white mice was obtained from various dealers, among 
whom Jeunet, of Paris, figures most largely. Some also were given to me by 
Mr Darbishire. 
The grey mice were caught in numerous houses in Oxfoi'd, and were brought 
to me by their captors in answer to an advertisement in Tlie Oxford Times. In 
order to avoid, as much as possible, any possibility of using grey mice with 
"fancy" blood in their veins, those caught in the precincts of the Museum, 
where Mr Darbishire's experiments had been going on for some months, were 
in all cases rejected. 
Previous Experiments of a Similar Nature. 
Breeding experiments similar to mine have been made by Cudnot ('02 and '03) 
and Allen ('04), and the fact that my results do not seem to be in exact 
accordance with theirs must serve for an apology for the appearance of an other- 
wise superfluous publication. That such differences should have arisen at first 
seemed surprising ; but an ingenious theory of Cuenot's explains the possibility 
of their occurrence, and I should like, before going on to the consideration of 
results, to give a short account of this theory. 
Biometrika iv 1 
