EXTENDED SERIES. 



65 



Dilute brown agouti x pink-eyed dilute brown agouti. 



Cros3 55. Dilute brown agouti heterozygous in dark eye crossed with homozygous pink- 

 eyed dilute brown agouti, or pink-eyed dilute brown. Y>Br 2 D>PpA 2 x Y 2 Br 2 d 2 p 2 {A 2 ) . 

 Expectation, 1 dBrAg, 1 pdBrAg. 



Dilute brown agouti x brown. 



Cross 56. Dilute brown agouti heterozygous in dark eye and agouti crossed with brown 

 heterozygous in dark eye. Y 2 Br 2 d 2 PpA x YiBr>D>Pp. Expectation, 3 BrAg, 3 Br, 

 1 pBrAg, 1 pBr. 



VII. Pink-Eyed Brown Agouti, YBrDpA (Fig. 7). 



Eyes clear pink; ears apparently unpigmented, as are also feet and tail. Hairs on ventral 

 surface indistinguishable superficially from a deep pink-eyed yellow. When examined 

 more closely they are found to be darker at the base than at the tip, showing the pres- 

 ence of the agouti pattern. Dorsal hair a very rich brownish yellow and deeper colored 

 at the base with dull brownish pigment. Because of the reduction of brown pigment 

 at the tips of the hairs the appearance of banding or " ticking" is almost entirely wanting. 

 Whiskers, hairs at base of ears, and around the anus are yellow. 



Pink-eyed brown agouti X pink-eyed brown agouti. 

 Cross 57. Both parents heterozygous in agouti. Y 2 Br 2 D 2 p 2 A x Y 2 Br 2 D,p 2 A. Expectation, 

 3 pBrAg, 1 pBr. 



Cross 58. Both parents heterozygous in density and agouti. Y 2 Br 2 Ddp 2 A xY 2 Br 2 Ddp 2 A. 

 Expectation, 9 pBrAg, 3 pBr, 3 pdBrAg, 1 pdBr. 



