RELATING TO SECONDARY SEXUAL CHARACTERS. 



19 



B. Description of F2 Birds. 



All together there are 72 hens, 29 hen-feathered males, and 26 cock- 

 feathered males, as shown in table 1 : 



Table 1. 



F: Hens. 



A. 8 females that are like Fi; 7 others resemble them below, but have stippled back and 



rump feathers (4 of these have yellow necks, and 3 black necks like those of Fi). 

 Here, then, are two or three subdivisions, or perhaps main classes. 



B. 1 female is very close to game, having the characteristic stippling above and salmon 



breast below. She is darker colored than the game females, therefore more like 

 the Leghorn female. 



C. 3 birds resemble the Sebright in plumage, but would not pass muster for realSebrights. 



D. 3 others have spangled breast feathers like the Sebright, but a great amount of stippling 



on the back. 



E. 6 birds are yellow on breast, with stippled back. 



F. 6 others are yellow, stippled birds with a little yellow penciling on the breast. 



6. 11 black birds with some stippling on the back of the wing, and sometimes with 



traces of yellow in the hackle. 

 H. 6 other birds are dark, but not as black as the last. There is some stippling, especially 

 on breast. The hackle is always striped. (4 of these have yellow necks above 

 and below; 2 have dark necks.) The series of feathers photographed in plate 10, 

 figure 4, from a bird of class H, show all gradations between a spangled and a 

 barred condition. It is practically certain that the barring seen here (as well as 

 that under class M) is quite different from that of the Barred Plymouth Rock. 



7. 1 yellow hen with a little black (as a band) on wings and tail. 



J. 2 other yellow birds with a little black penciling on the back, the tail, and with long 

 wing feathers. 



F2 MaIiES. 



K. 2 intermediate males with a black-splotched red breast and black tail. The saddle is 

 coarsely stippled. The corresponding male-feathered bird is red above. 



L. A Sebright-like bird with black stippled feathers on back; the rest of the plumage 

 heavily laced. Posterior part of breast and thigh black. The tail stippled. 



