108 DESCRIPTION OF PLATES. 



Plate 9. 



Fios. 1, 1a. Typical feathers of hackle and saddle from hen-feathered bird (No. 68) 



plate 3, figure 2, that changed over to the cocWeathered bird of plate 3, 

 figure 3. 



Figs. 2, 2a. Typical feathers of an Fi male (2) that changed over partly as a result of degen- 

 eration of his testes, into a cock-feathered bird (2a). The change was not so 

 great as it is after castration. 



Figs. 3, 3a. Typical feathers of Sebright male that slightly changed towards cock-feathering 

 (old hackle feather missing). 



Plate 10. 



Figs. 1, 1a. Old (1) and new (1a) wing-coverts of normal Sebright (1) and castrated (1a). 

 Figs. 2a, 2b. Upper row, to ri^t, "Transitional" hackle feathers (2a), and a slightly 



later changed-over feather from wing-bow (2a), and from back (2b). Second 



row, to left, old (2), transitional (2a), and changed-over feather (26), from 



saddle of Sebright. 

 Fig. 3. Three feathers (tail-covert, wing-bow, and saddle) of an Fa hen-feathered game-like 



male. 

 Fig. 4. A series of breast feathers from an Fj bird. At one end of the series (the left) the 



feather is spangled, at the other barred. 

 Fig. 5. A series of breast feathers from another Fj bird. At one end of the series (the 



left) the feathers are penciled, at the other end they are barred. 



