ILLUSTRATIONS 



PAGE 



Fig. 1. The Egyptian Cat-goddess, Bubastis 8 



2. Polychrome pottery mouse from Egypt 8 



3. A. A coin of Alexandria Troas bearing the cultus statue of 



Apollo Smintheus 10 



B. A coin of Tenedos (300 B.C.) bearing the statue of Apollo 



Smintheus and a mouse 10 



4. The Japanese God of Wealth, Dai-koku, and his symbolic 



white mouse 15 



5. The mouse netsuke by the Japanese artist, Masateru ... 19 



6. Diagram illustrating the inheritance of a simple, recessive, 



mendelizing unit-character such as albinism 36 



7. Diagram of a pair of chromosomes showing the linkage re- 



lationship of two pairs of genes before, during, and after a 



crossing-over 41 



8. Diagram of a back-cross illustrating the linkage between rod- 



less retina and silver pelage 42 



9. Diagram of chromosomes of the house mouse with genes 



for unit characters distributed arbitrarily among them to 



show genetic independence or linkage of the characters . 43 



10. Wire mouse cage used at the Bussey Institution 53 



11. Sectional view of feeding can 57 



12. Gray (wild coated) 59 



13. Brown extreme dilute (bb c d c d ) 59 



14. Cinnamon chinchilla (bb c ch c ch ) 59 



15. Albino (cc) 59 



16. Lethal yellow (A } 'A) .' 61 



17. Non-agouti black (aa) 61 



18. Sooty yellow (sable) (A r a) 61 



19. Black-and-tan or white-bellied non-agouti black (at at) . . 61 



20. Gray recessive spotted (piebald) (ss) 63 



21. Non-agouti black with dominant spotting (aa Ww) .... 63 



22. Japanese waltzer non-agouti black piebald (selected for 



whiteness) (aa ss vv) 63 



23. Non-agouti black-eyed-white (homozygous for piebald) (aa 



Ww ss) 63 



24. Blue or non-agouti dilute black (aa dd) 65 



25. Non-agouti silver (aa ss) ^5 



26. Non-agouti brown (aa bb) 65 



