42 



Mary Blount. 



Fig. 28. 



Fig. 29. 



Fig. 30. 



Fig. 28. — Pigeon egg at 4.30 a. m., eight and one-tialf liours after fertiliza- 

 tion. Compare Figs. 27, 29 and 30. 



Fig. 29. — Pigeon egg at 4.45 a. m., eight and three-fourths hours after fertili- 

 zation. Compare Figs. 27, 28 and 30. 



Fig. 30. — Diagram of the teleost egg in the 8-celled stage. Compare with 

 Figs. 27, 28 and 29. 



Fig. 31. 



Fig. 32. 



Fig. 31. — Pigeon egg at 3 a. m., seven hours after fertilization. 

 Fig. 32. — Pigeon egg obtained at 4.30 a. m., eight and one-half hours from 

 fertilization. 



