The Early Development of the Pigeon's Egg. 43 



Fig. 33. — Pigeon egg at 4.00 a. m., eight hours after fertilization. 



Fig. 34. 



Fig. 35. 



Fig. 34. — Pigeon egg at 2.30 a. m., six and one-half hours after fertilization. 

 Fig. 35. — Pigeon egg at five o'clock a. m., nine hours after fertilization. 



