60 



Colours and Pigments of Flowers, etc. 



produce carotin, or in others from loss probably of some of the constituents 

 of xanthin. 



8. " Anthocyanin " may exist together with plastid pigments in the type, 

 in which case derivative products of both forms of pigmentation are found 

 among the varieties. 



I wish to take this opportunity to express my sincere thanks to 

 Prof. Bateson for his kindness and help throughout this research. I am also 

 indebted to Mr. John Parkin, who has kindly made various suggestions. 



BIBLIOGRAPHY. 



1. Bateson, Saunders, and Punnett, 'Reports to the Evolution Committee of the Royal 



Society,' I, II, and III. 



2. Bidgood, J., " Floral Colours and Pigments," ' Roy. Hort. Soc. Journ.,' December, 



1905. 



3. Courchet, " Recherches sur les chromoleucites," ' Ann. des Sci. Nat.,' serie 7, 1888. 



4. Czapek, ' Biochemie der Pflanzen.' 



5. De Vries, ' Species and Varieties, their Origin by Mutation.' 



6. Heise, R., " Zur Kenntniss des Heidelbeerfarbstoffes," ' Arbeiten Kaiserl. Gesund- 



heitsamt,' 1894. 



7. Lock, R. H., " The Present State of Knowledge of Heredity in Pisum," ' Ann. of the 



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K. K. Oenologischen u. Pomologischen Lehranstalt Klosterneuberg bei Wien, ; 

 1894—95. 



12. Wheldale, M., "Inheritance of Flower-colour in Antirrhinum majus," 'Roy. Soc. 



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13. Zimmermann, ' Botanical Microtechnique.' 



