J. A. S. Watson 67 



EXPLANATION OF PLATE XII. 



Fig. 1. Fi (J (No. 1) at 2 years 9 months old. 



Fig. 2. Two F2 yearling heifers shewing extreme types of coat. 



Fig. 3. Dun Fx cow with black F^ calf. 



LITERATURE CITED. 



1. Wilson, James. " Mendelian Characters among Shorthorn Cattle." Set. Proc. 



Roy. Dub. Soc. II. (1908.) 



2. Laughlin, H. H. "The Inheritance of Colonr in Shorthorn Cattle." Amer. 



Naturalist, Vol. v. 45. No. 540. (1911.) 



3. Wentworth, E. N. "Colour in Shorthorn Cattle." American Breedem^ 



Magazine., Vol. v. No. 4. (1913.) 



4. Major, C. F. J. " On the Mammalian Fauna of the Val D'Arno." Qaart. 



Jour. Geol. Soc. Lond. Vol. v. No. 41. (1885.) 



5. GowEN, J. W. " Studies in Inheritance, of certain characters of Cro.sses between 



Dairy and Beef Breeds of Cattle." Jour. Agric. Research, Washington, xv. 1. 

 (1918.) 



6. Lloyd Jones, 0. and Evvard, J. M. " Inheritance of Colour and Horns in 



blue-grey cattle." Iowa Sta. Research BidL 30, Ames, Iowa, 1916. 



7. Bateson and Saunders. " Experimental Studies in the Physiology of Here- 



dity." Royal Society (London). Repts. Evolution Committee, No. 1, footnote, 

 p. 160. (1901.) 



8. Spillman, W. J. " Mendel's Law in Relation to Animal Breeding." Repts. 



Amer. Breeders^ Association. (1905.) 

 8a. Spillman, W. J. "A Mendelian Character in Cattle." Science, N.S. 23, 

 No. 588, p. 549. (1906.) 



9. Wood, T. B. " Note on the Inheritance of Horns and Face Colour in Sheep." 



Journal Agric. Science, Vol. i. pt. 3. (1905.) 



10. Arkell, T. R. "Some Data on the Inheritance of Horns in Sheep." Hamps. 



Agr. Exft. Sta. Bidl. No. 160. (1912.) 



11. Spillman, W. J. Science, N.S. 25, No. 634. (1907.) 



12. Wilson, J. "The Colours of Highland Cattle." Sci. Proc. Roy. Dublin Soc. 



Vol. XII. (N.S.). (1909.) 



13. Wilson, J. A Manual of Mendelism. London. (1916.) 



14. Babcock and Clausen. Genetics in Relation to Agriculture. (1918.) 



15. Wright, Sewall. " Color Inheritance in Mammals." (VI. Cattle.) Journal 



of Heredity, Vol. viii. 11. (1917.) 



5—2 



