TABLE OF CONTENTS. 



PAET I. THE HISTORY OF THE CHICK. 



CHAPTER I. 



The Stbuotuee of the Hen's Ego, and the Chanobs which take 



PLACE UP TO THE BEOINNINa 0^ InCUBAIION . pp. I — ■24. 



The Bhell and shell-membrane, i — 3. The albumen, 3. The 

 vitelline membrane, 4. The yolk, 5 — 7. Area opaoa, 7. Area 

 peUucida, 8. The structure of the blastoderm, 7 — 10. Eeoapitu- 

 lation, 10. The ovarian ovum, 11 — 15. The descent of the ovum 

 along the oviduct, 15 — 17. Impregnation, 17. Segmentation, 

 18 — 24. 



CHAPTER II. 



Bkief Summakt of the whole Histoky of Inoueation, 

 pp. 25—47. 



The embryo is formed in the area pellucida, 25. The germinal 

 layers, 25, 26. The extension of the blastoderm over the yolk, 26. 

 The vascular area, 27. The head-fold, 27—36. The tail-fold, 37. 

 The lateral folds, 37. The yolk-sac, 37. The alimentary canal, 39. 

 The neural tube, 39, 40. The body-cavity, 41. The somatopleure, 41. 

 The sjilanehnopleure, 42. The stalk of the yolk-sac, 42, 43. The 

 amnion, 43 — 46. The aUantois, 46, 47. 



