No. 485] 



NOTES AXD UrEUArVRK 



331 



in which case the flcwcr is white. In ilic civmn sum p.., ili<' 

 sap color, the tint hc\\\\i (hie to pitriiicnicd clirniiKii.hiM-. The 



A similar roiill has h.vn nh.rrvr.l in l.rr.Mlin- lnui>. 'rhr ruM' 

 comb of tlic W yan.lollr ivpc ami the pea (•(.nil) of llic Indian -anir 

 are both .Innnnant ovrr ihr sinuir ,-unil. of the [..■u-liorn type. WIum, 

 a rose cnil. i> < ro.M.,l ^^\^\^ a p« a conil. a new typ,' n >ull>. .Ics. rihe.l 

 as the " wainni - r.unl.. It ivM inMcs that of tlie Malav bnr,l. When 

 such hybrids aiv bn .l toovtlirr fnnr types of comb appear in the next 



of 9:3:3:1. 



ism. When a gravis cros.sed witli an albino, -ray hybrid^ iv.uh uhiel, 

 produce young in the proportion of ^nays, ;; blaek>, and 1 white>. 

 The factors involved are ]>i<rinentation. .1. dominant over albinism, 

 a; and grayness, />'. d.nninani over blackness. The four white 

 animals which appear identical include iln-ee forms, namely aa BB, 

 2 aa Bb, and aa hh, all of which lack the pij,nnetitati()n factor >4, From 

 this it appears that the wild i,nay color consists of a factor for pigmen- 

 tation and another for irniyne^. Uy loss of the former a white rabbit 

 results, and by loss of the latter, a l)lack one. In the offspring of 

 such a white and l)lack, r< n rsimi occurs to the original gray form. 

 Similarly white pea l)lo><oin^ may .^n h contain one of the two factors 

 for pigmentation, and by cro»in<r snch whites, reversion to a wild 

 colored type has been obser\cd. Tims reversion ha> been dcline(] 



in the course of jihylo^'enetic development. 



From these and many other observations, the author concludes 

 that no hoiticnlinrali>t <an j)ropose to rai.se a tall pea from a dwarf 

 bv a proce-,^ of mamirinir, nor by selecting minute fluctuations, but 

 only by obtainin.i: new airirregations of unit <'haracters throng], br.-ed- 



' In Mr. Pulinett''s'book no refenMue i. ma.lc to 'mixed inheritan.e' 

 whereby the parental chara< icrs arc blended in the offspring. It nm-t 

 be remembered, however, that ral)bii.-> with ears of medium li'iigth are 



