288 Toyama. On the varying dominance of certain white breeds, etc. 



Literatures cited. 



1. Bateson, W. Mendel's principles of heredity. 1909. 



2. Castle, W. E. Double mating of silk-worm moths. 1911. 



3. CouTAGNE, G. Recherches experimentales sur I'Heredite chez les vers a sole. 1902. 



4. Gregory, R. P. Experiment with Primula sinensis. 191 1. 



5. IsHiwATA, S. Observations in inheritance of the silk-worm (Japanese). 190S. 



6. Keeble and Pellew. \Vhite flowered varieties of Primula sinensis. 1910. 



7. Kellog, V. L (i). Inheritance in silk-worms, i. 1908. 



S. — (2). On experiment in double mating. 191 1. 



9. Toyama, K. (i). Studies on the hybridology of insects. I. On some silk-worm 

 crosses, with special reference to Mendel's law of heredity. 1906. 



10. — (2). On the polygamous habit of the silk-worm. 1906. 



11. — (3). A sport of the silk-worm, B. mori, L. and its hereditary 



behaviour. 1909. 



12. Quajat. Sulla reproduzione degli incroci. 191 1. 



May 20* 1912. 



