H. H. Newman 31 



9. Normal wife of M. W. Uzzell. 



10. M. W. Uzzell, aet. 37, normal so far as night-blindness is con- 

 cerned, but has an incipient case of Pterygium, the least troublesome 

 case among the males of the third and fourth generations. He has only 

 one child, a normal son, aged 3. 



11. Normal husband of Mrs E. F. Floyd. 



12. Mrs E. F. Floyd, aet. 35, normal so far as night-blindness is 

 concerned, but shows a moderate development of Pterygium. She has 

 had two night-blind sons, one of whom is now dead, and two normal 

 daughters. The living son and one of the daughters are twins. 



18. G. D. Uzzell, Jr., aet. 32, normal so far as night-blindness is 

 concerned, but with a pronounced case of Pterygium. He is unmarried. 



14. /. U. Uzzell, aet. 30, normal so far as night-blindness is con- 

 cerned, but with Pterygium obvious. He is unmarried. 



15. Mrs Hurst, aet. 27, normal. She has two sons, one certainly 

 night-blind and the other too young to exhibit the defect. She has also 

 two normal daughters. 



16. Normal husband of Mrs Hurst. 



IV, 17 — 25. Issue (including normal mates) of III, 7 and 8. No 

 other pregnancies. 



17. 18, 21, 22. Normal sons of E. B. Uzzell. They are all married 

 and have none but normal issue. 



19. Mrs Montgomery. Normal. Has two night-blind sons and 

 one normal son, and one normal daughter. 



20. Normal husband of Mrs Montgomery. 



23. Mrs Norton. Normal. Has one night-blind son. 



24. Normal husband of Mrs Norton. 



25. Normal unmarried son of E. B. Uzzell. 



V, 1—7. Issue of IV, 3 and 4. 



1. Irvin Uzzell, aet. 19, normal so far as night-blindness is con- 

 cerned and without Pterygium. 



2. Wason Uzzell, aet. 17, normal so far as night-blindness is con- 

 cerned. Has had some trouble with Pterygium. 



3 and 4. Jewel and Minter Uzzell, dead. Both were normal. 

 5 and 6. Lester, aet. 11, and Douglas Uzzell, aet. 9, normal so far as 

 night-blindness is concerned, but both have incipient Pterygium. 



7. Female infant, died in infancy. 

 V, 8—14. Issue of IV, 5 and 6. 



8. Elizabeth L. Brown, aet. 21, normal. Miss Brown is a member 

 of the present senior class at the University of Texas and has made a 



