Fig. 2. Apple chimeras. Fruit said to be made up of two distinct 
varieties of apple— the Russet and the Boston Stripe. Note the line sep- 
arating the two kinds of tissue. After Castle, in The Journal of Heredity. 
Fig. 3. Different growth stages of a grafted frog embryo. The forepart 
of this embryo is one species of frog, while the hind part is another species. 
After Harrison. 
