K. N. Salaman 4'5 



PLATE XXI. 



The family L, raised from the cross of "Red Fir Apple" x "Reading Russet." In 

 the F^, No. L', a Iddney has been omitted. 



PLATES XXII, XXIIl. 



F^, family raised from L', selfed. The rounds are 1 in 4, viz.: Nos. 1, 2, 22, 35, 37, 

 46, 47, 49, 61, 63, 64 (Plate XXII). Five long- and three round-tubered individuals 

 have been omitted. In Plate XXIII the " rounds" are Nos. 6, 10, 17, 19, 22, 24, 29, 

 30, 33, 40, 47, 52, 54, 61. 



PLATE XXIV. 



The family raised by crossing IP (f of "Queen of the Valley" x " Flourball" seedling) 

 x" Bohemian Pearl " long-tubered seedling. Nos. 2 and 20 which in the plate look 

 "round" are in reality much flattened and are clearly not rounds. Two other typical 

 long members of this family have been omitted. 



PLATE XXV. 



Examples of tubers, not from individual roots, of B. 

 " Bohemian Pearl " seedlings long and oval. 



"Congo." The long tubers are much more common than the stunted. 

 "Red Fir Apple." The tubers in 1909 were all more or less stunted as shown in 

 the Plate. 



PLATE XXVI. 



C, 1907, one of the seedlings of "Sole's Kidney." 

 C, 1909, representatives of 4 seedlings of C, 1907. 



PLATE XXVII. 



Family raised from selfing Lindsay's etuberosum. The long-tubered seedlings are here in 

 the minority. The ravages of the disease are clearly seen. 



PLATE XXVIII. 



(Reproduced by kind permission of Messrs Sutton of Reading.) The kidney potato "Super- 

 lative" in clamp. The variability of shape amongst the kidney and pebble-shaped 

 tubers is very marked. 



PLATE XXIX. 



The f family raised by crossing "Congo" x "Flourball." The segregation of the 

 colours Purple, Bed and White are well shown. The shapes are all "long" and the 

 eyes all " deep," demonstrating the dominance of these characters. 



