238 Goat-Colour in Rabbits 



are simply " Himalayised " anitnals with white markings, and are strictly 

 paralleled by their white marked coloured brothers and sisters. It is 

 probable that the " mosaics " which appeared in Castle's experiments 

 were due to the fact that the albino mothers used were potentially 

 white marked. The inheritance of these white markings is not yet 

 clear but their genetics are at present under investigation. 



In conclusion I desire to acknowledge a gift of £10 from the Master 

 and Fellows of Gonville and Caius College towards the cost of these 

 experiments in 1908, and in the present year a grant of £.50 from the 

 Government Grant Committee of the Royal Society. 



EXPLANATION OF PLATES. 



PLATE XII. 



Fig. 1. Agouti-black (heterozygous for black). 



Fig. 2. Agouti-black {homozygous for black). 



Fig. 3. Deep cinnamon-agouti. 



Fig. 4. Chocolate. 



PLATE XIII, 



Fig. 1. Orange. 



Fig. 2. Yellow. 



Fig. 3. Cinnamon-agouti. 



Fig. 4. Tortoise. 



PLATE XIV. 

 Fig. 1. Himalayan with black points. 

 Fig. 2. Himalayan with agouti points. 

 The above are all photographed directly from the original specimens. 



PAPERS REFERRED TO. 



(1) Castle, W. E. " Heredity of Coat Characters in Guinea-pigs and Raliliit.s." 



Publ. Carnegie Iiistit., Washington, 190R. 



(2) . " Colour- varieties of the Rabbit and of other Rodents." Science, liJOT. 



(3) (and others). " Studies of Inheritance in Rabbits." Puhl. Carnccjie 



Instil., Washington, 1909. 



(4) Hagedoorn, a. L. "The Genetic Factors in the Development of the House- 



mouse, &c." Zuit. f. ind. Abst. Vercrb., 1912. 



(5) Hdrst, C. C. " Experimental Studies on Heredity in Rabbits." Linn. Soc. 



Journ. ZooL, 1905. 



(6) . " Meudelian Characters in Plants and Animals." Hep. Conf. on Genetics, 



R. Hortic. Soc, Loudon, 1906. 



(7) Morgan, T. H. " An Attempt to Analyse the Constitution of the Chromosomes 



on the Basis of Sex-limited Inheritance in Drosophila." Journ. E.>:p. 

 ZooL, 1911. 



(8) Woods, F. A. " Mendel's Law and some records in Rabbit Breeding " 



Biometrika, 1903. 



