582 Messrs. W. Bateson and R. P. Gregory. [July 31, 
wild plants so far tested, have been found to be heterozygous in respect of 
style. | 
The experiments now to be described all relate to P. sinensis. The 
inheritance of flower-colour and other characters will be dealt with in a 
future communication. We take this opportunity of acknowledging our 
indebtedness to Messrs. Sutton and Sons, who have for some years placed 
their great collection of Primulas at our disposal, and have assisted us in 
many ways during the course of our inquiries. 
I.—NoRMAL CASES. 
Long-styled x Long-styled. 
Ten such crosses were made, from which 90 offspring were raised, all long- 
styled. In F, 56 offspring, all long, were raised. Various extracted long- 
styled recessives, fertilised by self, and by pure longs, gave 85 plants, all 
long.* 
Short-styled x Short-styled. 
All the four short-styled plants originally obtained for use in these 
experiments proved to be heterozygous. From’ short-styled x short-styled, 
26 short and 10 long were raised, the expectation being 3:1. Of the 
26 short some were DD and others DR. One, on self-fertilisation, gave seven 
shorts. Two others, on self-fertilisation, gave 24 short, four long. Nine 
shorts raised in F, from long x short gave, on self-fertilisation, 120 shorts and 
49 longs. The union DRx DR gave, therefore, a total of 144 short, 53 long; 
or, including the 36 raised between the original plants, 170 short, 63 long. 
Darwin’s} results from this form of union are valuable as indicating that 
he probably obtained a pure dominant. The parent short-styled plant, self- 
fertilised, gave eight plants, seven short, one long. The shorts, self-fertilised, 
gave only two plants which flowered (short), but the cross between short- 
styled and long-styled gave 15, all short. 
Long 2? x Short 3, and Reciprocal Cross. 
In the first instance these crosses were all Rx DR or DRxR, which gave 
respectively 30 short, 24 long; and 14 short, 13 long. In Fs, crosses between 
DD and R gave 92 all short; and DR~x R gave 40 short, 48 long. 
Crosses with an Equal-styled Race. 
Of late years a peculiar type of P. sinensis has been much grown, which is 
characterised by an extensive spreading of the central yellow eye. Instead 
* Cf. Darwin, loc. cit., pp. 213, 214. 
+, Loc. Cil., Pe 2lor 
