PLATE 3 



EXPLANATION OP FIGURES 



7-12 Schematic figures to illustrate size, color, density, number and dis- 

 tribution of the yellow spots. Printed sketches of a uniform size, showing the 

 outlines of the animal's body, were used and the spots were drawn not in their 

 actual size but enlarged in proportion to the size of the sketch. Spots of 'almost 

 orange yellow' color are shown orange, while 'light yellow' spots are represented 

 by yellow. Dotted spots are indicated by black dots on the yellow color. The 

 borders of the graft, where they still were visible, are indicated by a white line. 



7 Series XXV, experiment 21. Spot 1 is the reddish yellow spot of the graft; 

 the spots of the host were light yellow. Drawn on December 14, 1916, from live 

 specimen. 



8 Series XXV, experiment 22. The spots of the host are light yellow; spots, 1, 

 2 and 3 are very bright reddish yellow spots. Spot 1 and 2 are spots of the graft; 

 the history of spot 3 has not been recorded, but it probably also belongs to the 

 graft (see text p. 258). Drawn on December 14, 1916, from live specimen. 



9 Series XXV, experiment 45. The spots of the host are either pale yellow 

 (tail ) or they are faint dotted spots (body) ; spot 1, which belongs to the graft, is 

 bright and almost orange yellow. Drawn December 26, 1916, from live specimen. 



10 Series XXV, experiment 28. The host developed on its body only a few 

 light yellow and mostly small spots while the largest part of the body is without 

 spots. Drawn December 18, 1916 : from live specimen. 



11 Series XXV, experiment 11. The host developed only small and faint 

 dotted yellow spots, while the graft developed a relatively large, very bright, 

 almost orange yellow spot (spotl). Drawn December 13, 1916, from live specimen. 



12 Series XXV, experiment 12. The host developed only 1 faint dotted 

 yellow spot on the whole body; the graft developed 4 spots, 2 of them (spot 1 

 and 2) were bright and almost orange yellow. Drawn December 13, 1916, from 

 live animal. 



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