6oo 



SCIENCE PROGRESS 



We think, therefore, that the genealogies may be regarded as 

 rehable, and, granted this, there is no choice but to beHeve that 

 strains showing abnormal proportions of the sexes do occur, and 

 that the characteristic of begetting a preponderance of one sex 

 over another is an attribute of the male. 



APPENDIX 

 The following are the references of the families mentioned 



in the paper 

 Family No. 



A Memoir of John Kay. Privately printed. 

 The Family of Rogers. From the " Visitations.' 

 The Family of Fielden. From the " Visitations. 

 The Hawtrey Family. From the book. 

 The Genealogy of Fox. Privately printed. 



