j v CONTENTS. 



. iad us inheritance in gumearpiga-Gmtinued. PAGE - 



II, r. ditv of fur and eve color— Continued ^ 



( "oior m, white fi4 



Lntenatj of genera] color development "* 



I >ark M. J ellow color 



\ .in.it 1. .us of dark color 



1 able of factor combinations 



Hereditary factora and the physiology of pigment °' 



:> Of experiment- 



Material 7 , 



- • .mat io position 



Description of stocks ' 



1 7 < >1 >lcmB 



[nberitanoe of dilution \} 



The red-eye factor \} 



I Hlul ion ™ 



The dilution factor • 80 



Inheritance of minor variations in intensity 85 



Methods and accuracy of grading 85 



Variation! in intense guinea-pigs and albinos 85 



Multiple allelomorphs • .' ' ' " ^ 



The relations of imperfect dominance, stock, and age to grades of intensity . . 87 



Yariat ions of yellow 89 



Varial ions of sepia 92 



Variations of eye color 93 



Summary 93 



Inheritance of variations in the agouti pattern 94 



Previous work 95 



The inheritance of the agouti of C. rufescens 96 



Minor variations 99 



inheritance of the agouti of C. cvileri 100 



Inheritance of rough fur 100 



Classification 102 



Previous work 102 



Material 103 



Problems 104 



Inheritance of rough as opposed to smooth 105 



Inheritance of major variations 106 



Possibilities of linkage among rough and color factors 113 



Summary of rough tables 115 



>r variations 116 



ighnees of Beries II 117 



Summary 118 



conclusion 119 



1 data 121 



tables 62 to 137 121 



r '" 1 ' iMiiii: BxxmrjBB of Piebald Rats and Selection, with Observations 



one Coupling. By W. E. Castle. 



PAGE. 



Jed with wild rats 163-168 



lection of the hooded pattern of rats 168-172 



rurth' on t| 1( . mutant series 173-174 



n yellow rata 175-180 



181-187 



188-190 



191-192 



