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THE AMERICAN NATURALIST [Vol. LV 



in the down pi^'inented offspring of a non-barred 

 X wliitc Plymouth Kock ? cross accurately with regard 

 to sex, 1)> the presence or absence of the occipital spot. 

 Moiuaii <iii(l Goodale (191:^) made use of this spot in 

 class! r> iim' barred and non-barred chicks which failed to 

 hateli and Puimett (1919) also has made use of it in sort- 

 ing newly hatched cross-bred chicks according to sex. 



The progeny of crosses involving white AVyandottes 

 frequently displayed Wyandotte lacing of a lesser or 

 greater degree of perfection, thouu'li the a])i)('ai'ance of 

 thi> ])attern was neitlier as constant a^ <li-tinct as 

 that of the barred pattern. Tlie appeai-aiiec of the lacing 

 wa- to l)c ('\])e('t('d if, a> i- u-cnerally stated in the litera- 

 ture on W'vaiidottcs (src MeGrew, 1901), the white 

 \:\vii'\y was dciixcd (hfrctl)' from the silver Wyandotte, 

 which i> hiced. 



In eoiinectioii witli these recessive wdiite crosses is to 

 be noted the fact that several white individuals, although 

 ' ' l)ure-bred ' ' in the terminology of the poultryman, gave 

 i-csuhs which differed from the foreu-oinu-. Four white 

 W \ aiidottc females proved to cai'i'v both the />' and 

 LirtMi. ;i,m1 were of the same eompo^it ion with i.-p.-t 

 to tiicsc factors as a pure-bred blue Amh-ilnsian, Itiit uuWkr 

 the l)lue Aiidalusian they carried ji in the hoiiio/.yuous 

 condition. One of these, whicli has already been repoiicd 

 on elsewhere (Lippincott, 1919), cariicd the sex liidced 

 l)atLern factor for barring as weU. Di-xden ( 191(5, p. (i7) 

 lias also reported a white Wyandotte cai-rying a factor 



