122 



INHERITANCE IN GUINEA-PIGS. 



Crosses 16 to 44 include all matings recorded by the writer in which 

 there was dilution or red-eye in either parents or offspring, except for a 

 few cases among the Cavia cutleri hybrids and cases of intense by dilute 

 with only intense young. Some other crosses are included for special 

 reasons bearing on the inheritance in the albino series. There is some 

 repetition from matings outside of 16 to 44, but most of those outside 

 are intense by intense, with only intense and, in some cases, albino 

 young. As in the agouti crosses, all matings are numbered in column 1. 

 The number, description, and descent of the mother and father are 

 given in columns 2 and 3, respectively. All the offspring are classified 

 under the heads Int, Dil, RE, or W, which stand for intense, dilute, 

 red-eye, and white (albino), respectively. A further description of all 

 except the albinos is given under the column " Remarks." The 

 attempt has been made to give the grade of dilution at birth for every 

 dilute or red-eyed animal where known. 



Crosses 45 to 57 give the data on the inheritance of rough fur in the 

 4-toe and tricolor stocks. As before, the matings are numbered. The 

 young are classified under the heads A, B, C, D, E, and Sm, which refer 

 to the grades of roughness defined in the paper and to smooth. 



The parents and offspring were black (usually with red and white 

 blotches) except for a few cases which are all noted. Such a symbol as 

 red-B means a red of grade rough B. 



Crosses 58 to 62 give the results in the pure Lima stock and 63 the 

 results in the cross of Lima with other stocks. Where no color is given 

 black is always to be understood. 



Crosses 64 to 66 give the matings involving rough fur among Cavia 

 rufescens hybrids which were recorded by the writer. 



Cross 67 gives crosses of pure lea with rough A stock. 



Crosses 68 to 78 give all the data in matings involving Cavia cutleri 

 ancestry made by the writer. 



The following symbols are used : 



AgLborAg = Black-red agouti, light-belly. 



AgTb = Black-red agouti,ticked-belly. 



B = Black. 



BrAgLb = Brown-red agouti, light-belly. 



BrAgTb = Brown-red agouti, ticked 

 belly. 



Br = Brown. 



R = Red (black-eye). 



R(Br) = Red (brown-eye). 



SYAgLb = Sepia-yellow agouti, light- 

 bdly. 

 = Sepia-yellow agouti, ticked- 



belly. 

 = Sepia. 



SYAgTb 

 Sep, S 



SAg(R) 

 Sep(R) 

 W 



Red(p) 

 Sep (p) 



In such expressions as S 3 Y 3 Ag the numerals stand for the grades defined in the text. 

 In crosses 1-15, Lb and Tb are used at the heads of the columns to include any light-bellied 

 or ticked-bellied agouti. Non means non-agouti. 



A, B, C, D, E, and Sm are used for grades of roughness and for smooth. 



BrYAgLb = Brown-yellow agouti, light- 

 belly. 

 BrYAgTb = Brown-yellow agouti, ticked- 



belly. 



LBr = Light brown. 



Y = Yellow (black-eye). 



Y(Br) = Yellow (brown-eye). 



Cr = Cream, used in compounds 



likeY. 



= Sepia-white agouti (red-eye). 

 = Sepia (red-eye). 

 = White or albino. 

 = Red (pink-eye). 

 = Sepia (pink-eye). 



