No. C39] IXHFAHTAXCE OF BLUE IX POULTBY 317 



gave all blues, just as would blue-si)lasli.'(l AiKl.ilusiaiis. 

 The pp{Re){rE) whites produced l)]ac-ks and blurs in 

 approximately equal numbers, exactly as would blue 

 Andalusians. The parental white genotype pp{rE) {rE), 

 which would give all blacks, was curiously enough, the 

 one of the whites which did not happen to be selected 

 for testing. 



It is important to note that while eight out of the nine 

 Fo genotypes were identified, no genotypes were found 

 other than those expected. 



X. Data on Andalusian X Black LancxShan Crosses 

 It appeared desirable, in order to ascertain whether 

 there was anything inherent in Andalusian black which 

 made its relation to Andalusian blue different from that 

 of other black breeds, to make certain matings of Anda- 

 lusians with black Langshans. The Langshan was chosen 

 because not only is it a dit¥erent breed, but it also belongs 

 to a diflPerent group of breeds. The original black Lang- 

 shans were, according to Brown (lOOfi, p. G'.]), imported 

 from China, while the Andalusians. according to the same 

 authority (]). ll>7), oriuinatcd from native stocks along 

 the borders ..f the Me.literranean Sea. S.> far as is 

 known they have nolliin- in eonnncn in their inunediate 

 aneestrv. Davenport (li'U) even p..int> to the proba- 

 bility that the inn.iediate wil.l ancestors .,f the Asiatic 

 breeds differed from those of the Mediterranean breeds. 

 If blacks differ in their relation to Andalusian blue it 

 w^ould seem probabh' that Andalusian black and Lang- 

 shan black might show this difference. 



The restdts of the Andalnsian-Lanushan matin-< are 

 shown in Table V. As may be >c.-n readily by reference 

 to this table the results are in every case precisely those 

 which might be expected if a black Andalusian had been 

 substitut.'d for the black Langshan. So far as the prin- 

 cipal factors under discussion are concenn.l it appears 

 that the black Langshans u>e(l were identical in composi- 



