; cena 
) La an ol an . 
ioe | , rs is 
Transmission of certain Coat Characters in Rats. 119 
ANCESTRY AND OFFSPRING TABLES. 
Explanations. 
The “ Offspring Columns ” include Crampe’s seven types, 1.e.— 
Cr 1 = grey with no white. 
Cr 2 = grey with ventral white patches and white carpal and metatarsal 
bands. 
Cr 3 = grey-white piebald. 
Cr 4 = albino. 
Cr 5 = black-white piebald. 
: *Cr 6b = “Irish” 0; black with ventral white patterns or patches and 
; | white carpal and metatarsal bands. 
, *Or6a= “Irish” a; black with little ventral white and no carpal or 
£ metatarsal white bands. 
Cr 7 = self black. 
* The division of the “Irish” type Cr 6 into“a” and “bd” is due to 
Doncaster, while I am responsible for the definitions of the two sub-classes 
as here given. 
The number of the parental pairing is given in the column headed Expt. 
The number of the ancestral pairings will be found in their respective 
columns, 
Experiments from 1 to 41 and from 67 onwards will be given in later 
papers. A few of these are to be found on the Descendants’ Tables 
(Pedigree Charts I to ITT). : | 
