200 



INHERITANCE, FERTILITY, AND SEX IN PIGEONS. 



T.MII.K 183. Normal iiirnlxilion time of ring-doves (cf.-l X 9 A). 



TABLE 184. Inciibtitiun linn i if eggs of <? albax risoria (ring) X 9 homer. 



TABLE 185. Concomitant incubation: Two crosses and two normals, with eggs interchanged. 



