32 Congenital Night-BUndness 



speciality of Zoology. Without her aid it would have been practically 

 impossible for me to have gathered the data for this paper. 



9. Henry W. Brown, dead, was unmistakably night-blind and 

 showed the usual associated defects. 



10. Aline Brown, dead, normal. 



11. Leona Brown, aet. 14, normal. 



12. Marjory Irene Brown, dead, normal. 



13. Stella K. Brown, aet. 9, normal. 



14. Walter 8. Brown, aet. 4, night-blind, and slightly strabismic. 

 Of him Miss E. L. Brown, his sister, writes: "Brother cannot see 

 anything out of the light at night, except that on bright nights he can 

 see anything between him and the sky. I took him out of doors one 

 night and noted that he could see the wind-mill, trees, houses, fences, 

 etc., but at the same time he could not distinguish his express wagon, 

 his kitten or other objects on the ground. He tries to count the stars 

 and the lights in other windows, so I am sure that he is less night-blind 

 than some of the Floyd and Hobdy children. He is not short-sighted 

 at all, but his eyes do not focus together. This was more noticeable 

 when he was a baby, but he has outgrown it until it is only noticeable 

 when he looks up." 



V, 15—21. Issue of IV, 7 and 8. 



15. Brew Hobdy, aet. 19, normal. 



16. John Hobdy, aet. 16, night-blind, myopic and strabismic. 



17. Walter B. Hobdy, aet. 13, night-blind, but without any other 

 optic defect. 



18. Maurice Hobdy, aet. 11, normal. 



19. Monroe Hobdy, aet. 8, night-blind, myopic and strabismic. 



20. Alton Hobdy, aet. 6, night-blind, myopic and strabismic. Was 

 tested as follows : Turns head to one side when reading, holds book less 

 than 8 inches from the eyes. 



21. Vernon Hobdy, aet. 4, night-blind, but without the other 

 associated defects. 



V, 22. Minter Uzzell, Jr., only issue of IV, 9 and 10, normal, 

 aet. 3. 



V, 23—26. Issue of IV, 11 and 12. 



23. Enid Floyd, aet. 10, normal. 



24 and 25. Ira and Irma Floyd, twins, aet. 5. Irma is normal. 

 Ira is night-blind, myopic and strabismic. Miss E. L. Brown writes of 

 him as follows : " He holds objects as small as a pin about five inches 

 from his eyes. Being too young to read I could not tell how far from 



