vni ILLUSTRATIONS 



PAGE 



Fig. 27. Short-ear lilac or pink-eye non-agouti black short-ear (aa 



pp se se) 65 



28. Heterozygous naked ("nakt") (N?i) 67 



29. Recessive hairless (hr hr) 67 



30. Homozygous naked (NN) 67 



31. Non-agouti dilute brown (aa bb dd) having developed two 



large transplanted tumors 67 



32. New-born mouse showing posterior reduplication. (Courtesy 



of Dr. C. H. Danforth) 69 



33. Non-agouti silver, normal and dwarf (2 1-2 months old (aa 



si si) and (aa si si dw dtv) 69 



34. Albino showing flexed tail 69 



35. Skulls of mice showing normal and parted f rentals .... 69 



36. Normal and rodless (rr) retinae of the house mouse ... 69 



