No. 629] INHERITANCE OF WHITE SPOTTING 479 



stricted parent. She could then produce restricted off- 

 spring, w'^iv, when crossed to self. 



Offspring of self by spotted known to carry self are 

 therefore twenty-one self and twenty spotted. 



The considerable spot male (24) was crossed to various 

 spotted females known by these or other crosses to pro- 

 duce self. With a restricted (3) he sired (34, 49) two 

 self, one restricted, three moderate, and three consider- 

 able. With a moderate (32) he sired (53) two self, one 

 restricted, one moderate and one extreme. With a re- 

 stricted (28) he sired (44) one self, one restricted, one 

 moderate, and one considerable. With a moderate (30) 

 he sired (45) two considerable and one extreme. With a 

 restricted (13) he sired (47) two self, two considerable 

 (one of which graded toward extreme), and one very ex- 

 treme. This last cross is interesting for the offspring 

 vary far in both directions from the parental types. 



Crosses of spotted by spotted when both carry self 

 have produced twenty-three spotted to eight self which 

 is very close to the three-to-oue expectation. 



The considerable ^]hA male (24) above mentioned when 

 crossed (41. 4(;. :>^K :>n In lii^ e..iiM<lrn.l.l.' ^pnt iiiotluT 

 (23) sired fivr .M.uMdn-al.lr .-iikI tu.. ivMrictrd. th.^ m-uiv- 

 gation being ^ti-iking throim-li I'ailiiiv of an\ inod.-ralrs 

 to appear. This is in line with the snpjjosition that the 

 mother (23) was carrying little spotting and was there- 

 fore of composition 7r"'vr^ The cross might therefore be 

 n-"'u'Xu""w' = oiu-'"u-'", ,r"'u- or /r"'/r' ) -f 2( /r' h"). 



The same male ( 24) ( w" ir) was crossed (48) to a solid- 

 white half sister (2*0 from the same mother (23) {w'"w^) 

 by a white mah^ (U'?). There were produced two ex- 

 treme >p,)t. The white female (2!)) niav th.M-.^fore have 

 be-n fl'/r and lh,- .Atn-iii. ^pm nff.prin- . 



The raihnv of aii\ thill- hiu-h.T tliaii n-trieted spot- 

 ting to occur among the offspriiiu' of rest ficted l)y self, 

 although cats with con>idernl)lf may carry iiidi('ate> 

 that there may be allelonu.rphie fact..r> determining 

 different degrees of spotting. In any case it appears 



