0^8-0//91ai 
W. F. 11. Wkldon 
49 
(15) 0/n55«2 Alb. ; 0//156rti Alb. 
? 0/7155.^2 (Alb.) = J x2 
I 
r ^ ^ ■ n 
I . I 
S 1 ^42&i = 3rf-?)/5zy ? .1 58a^ Alb. = .1 x 3 
I i r 1 
(J 0//l(/- = 3c ? 0S'12a5 = 5a ^ Cross-bred ? Alb. from 
I I Alb. from Steer Bacon =.11? 
I ^ , I 1 1 =.4xlor.ix2 No. 15 Alb. 
II I I 
(J No. 1 = Wa ? Cro.ss-brod ^ No. 1 1 = Wa ? Alb. from 
Lab. Alb. = Ax Strong = A11 
No. 1 Alb. No. 11 Alb. 
Oi/156a' is the same except that the mother is Abfiw' instead of a\ 
In the following Notes on Individual Mice, we have entered chiefly Wcklon's remarks, 
but occasionally we show reason for differing from the account given of individual mice in 
Darbishire's men\oir. We have only done so where on due consideration it seemed necessary, 
and chiefly because we found a wrong transcription from the records, or a characterisation not 
in accordance with the skins in our possession. From 0^ to 2ff matings we reproduce largely 
the results as given by Darbishire, although Weldon himself increased the number of these 
matings and had preserved for his own work all the skins possible. From SZT to 6£r the 
matings are taken entirely from the card indices of Weldon, which were completed after his 
death when the stock in existence was killed and the skins preserved. 
The notes we think throw considerable light on the difficulties of a large series of experi- 
ments of this kind ; they mark the extent to which the mothers destroyed their offspring ; the 
reasons why gaps occur in the matings, or in the skins preserved*; the occurrence of deformities 
or pathological states ; the possibility of the young mating at a very early stage, and the 
difficulty of preventing at least some escapes. We note also how hard at times is colour classifi- 
cation by mere verbal categories. The following terms are abbreviated : 
outbred = (95; cross-bred = A'i? ; inbred = /iJ; pure-bred = i'Z?. 
NOTES ON INDIVIDUAL MICE. 
OH Matings. 
0B8 or 7 A wild coloured mouse from Cross 7 got loose but was caught ; it was put back with 
the j'oung of Cross 8. Anyone of the litter called 8rt therefore may be la. — 0//8 or 7a- A huge 
mouse, looks like a rat. — QH8 or 7a'' Died young. — OIJQa^ Mangy. — OHll, Oflld Young all 
eaten. — OJISba^, OllSba^, 0H35a'' Mangy. — OH-ib In Book of Crosses it is distinctly stated under 
Cross 45 that the father was the from Cross 10. Under Cross 6 the (J from Cross 10 is said 
to bo No. 6. No. 6 in picture is IC/S but under Cross 45 in Biometrika, Vol. iii. the father 
is stated to be Tla. — OBibw^ This mouse waltzed, but not in a very close circle. — 0/753, 07/55 
Young eaten. — OHQla'' Skin not worth keeping. — 07/G2 Mother inbred 5 years. — OHli Offspring 
died young. — 01184a' The colour of coat is almost cream. — 07/84a8 Escaped. — 07/t^5a'j Mange 
on face. — 07787 Offspring born dead. — 0//90 Three offspring eaten. — 0H9la^ Died young. — 
* Occasionally if two skins in one mating were identical only one was preserved, but usually all 
were kept, if possible. 
7 
