REPORT OF THE CONFERENCE ON GENETICS. Al 
ExuHisit oF PLANTS BY WibnLIAM LAxTon, BEDForRD. 
1. Japanese plum x ‘ Moorpark’ apricot. 
2. Japanese plum x ‘Sea Eagle’ peach. 
3. Clematis Jackmanni x C. Flammula. 
4, The Loganberry x Raspberry. 
These plants are described and some of them figured in a paper by 
Mr. Laxton, which will be found further on. 
PHOTOGRAPHS OF SHEEP, SHOWING THE INHERITANCE OF HORNS AND 
-Facr-cotour. Exhibited by T. B. Woon, M.A., Cambridge University 
epartment of Agriculture. 
The photographs illustrated the following points observed in cross- 
breeding sheep at the Cambridge University Farm. 
Breeds under experiment :— 
Dorset.—W hite faces, and horned in both sexes. 
Suffolk.—Black faces, and hornless in both sexes. 
These two breeds were crossed both ways, and the reciprocals were 
found to be identical. 
Horns.—In F, all the males were horned, all the females hornless. 
In F,, males, the large majority were horned, a few were hornless, and 
a number possessed rudimentary horns. 
Females, the majority were hornless, a few were horned, and one 
showed rudimentary horns. 
Face-colour.—In F, all the sheep of both sexes had faces evenly 
speckled with black and white. 
In F, a few had pure-white faces, a 00: pure-black faces, and the large 
majority speckled faces. Most of these latter had the two colours evenly 
distributed, as in F,, but in some there was a marked tendency for the 
black colour to confine itself to the tip of the nose, to rings round the 
eyes, or to both these regions. 
Both the characters appear to be inherited according to Mendel’s 
laws. Horns appear to be dominant in the male, recessive in the female. 
The face-colour of the first generation is intermediate between that of 
the parents, but in the second generation small numbers of the two pure 
colours split out, the majority being intermediate, as would be expected. 
The occurrence of special “ patterns ’’ seems to indicate that face-colour is 
not a simple character. 
Exnipit oF BREEDING EXPERIMENTS WITH LEPIDOPTERA AND Rats 
BY L. Doncaster, M.A., King’s. College, Cambridge. 
Lepidoptera: In Angerona primaria -and its variety sordiata, the 
variety sordiata is dominant over the type, but the heterozygous form is 
distinguishable from the pure dominant. The later generations exhibit 
ordinary Mendelian segregation. 
In Abraras grossulariata the type is dominant over the variety 
lacticolor, but there is a coupling of the recessive variety with the female 
