92 
I. NAGAI : 
reddish brown. Pale yellow x black produced in F 1 , a pale yollowisk green seed and in F . z , 20 
greens, 20 pale greens, 10 pale yellows, 9 blacks, 2 browns and 4 reddish brown were found. 
Among greens and pale yellows, 17 and 7 were tinged with black of different shades respectively. 
Pale green x brown produced a pale green seed in F x , and in the next generation pale green, 
yellow, black, and brown appeared by the following numbers : 27, 9, 15, and 5. Among the first 
two classes, six of them in each were tinged with blackish shade. Black x green produced in 
F x , a pale yellowish green seed, and in F z , pale green, green, reddish brown, and black were 
found. • 
O. Kosenheim (Observations on Anthocyanins. I. The Anthocyanins of the Young Leaves of 
the Grape Vine. Biochemical Jour. 14 :178, 1920.) found certain chromogenic substances in the 
young leaves of the grape vine which gave an anthocyanin-like coloured substance by heating 
with hydrochloric acid. He called them “ leuco-anthocyanin ”. 
June, 1920. 
