THE INHERITANCE OF FAMILY TRAITS 141 



(1883) records the case of a woman who never had teeth 

 nor hair. Her sister was normal but her son was edentulous, 

 and hairless. The sister (by an undescribed consort) had 

 18 children who grew up. Of these, one is edentulous while 

 some of the others have failed to erupt all of their teeth. 



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4 8 



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131 U 

 IN 4unK. 



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Fig. 115. — Pedigree of a family with peculiarities of hair and naila. I, 2, 

 wife of PiROUT, poorly nourished nails and hair; II, 1 wife of Quimbel, bom 

 Rouen, 1775, poorly nourished nails and hair; III, 2, mar. Delaf, bald with 

 bad nails; III, 4, bald, bad nails; III, 5, Dei-au, bald, bad nails; III, 7, bald, 

 bad nails; III, 9, bald, bad nails; IV, 1, bad nails; IV, 3, bald and bad nails; 

 IV, 4, chestnut hair, bad nails; IV, 5, bald and bad nails; IV, 7, stands for 

 5 boys who were bald and had bad nails; IV, 8, a girl who is bald and has 

 bad nails; IV, 9, rachitic in childhood, bad hair and nails; IV, 11, bad naila 

 and hair; IV, 15, bad nails and hair; V, 1, had bad nails and hair, he died in- 

 sane but his brother was normal. Of the children of IV, 5, 6, three had bad 

 nails and hair, four (V, 7) were bald as well and nine others were normal. Of 

 the children of IV, 11, 12, two had bad nails and hair. Of the children of 

 IV, 15, 16, two had bad nails and hair and there were three granddaughten? 

 similarly affected. Nicolle et Halipke, 1895. 



The edentulous son married a normal (?) woman and had 

 eight children. One, 14 years of age, who was examined, 

 had many teeth undeveloped; another, at 16 years of age, 

 had only 14 teeth when 28 were to be expected. Further 

 data are necessary to determine whether or not imperfect 

 development of the dental arcade is due to a genuine defect 

 in the germ plasm. 



