CONTENTS OF VOLUME II. 



CHAPTER I. CEPHALOCHORDA. Pp. t 8. 



Segmentation and formation of the layers, pp. I 3. Central nervous system, 

 pp. 3, 4. Mesoblast, p. 5. General history of larva, pp. 6 8. 



CHAPTER II. UROCHORDA. Pp. 9 39. 



Solitaria, pp. 9 23. Development of embryo, pp. 9 15. Growth and 

 structure of free larva, pp. 15 19. Retrogressive metamorphosis, pp. 19 23. 

 Sedentaria, p. 23. Natantia, pp. 23 28. Doliolida:, pp. 28, 29. Salpida, pp. 

 29 34. Appendicularia, p. 34. Metagenesis, pp. 34 38. 



CHAPTER III. ELASMOBRANCHII. Pp. 40 67. 



Segmentation and formation of the layers, pp. 40 47. Epiblast, p. 47. 

 Mesoblast, pp. 47 51. Hypoblast and notochord, pp. 51 54. General 

 features of the embryo at successive stages, pp. 55 62. The yolk-sack, pp. 

 62-66. 



CHAPTER IV. TELEOSTEI. Pp. 68 82. 



Segmentation and formation of the layers, pp. 6873. General history of 

 the layers, pp. 73 75. General development of the embryo, pp. 76 81. 



CHAPTER V. CYCLOSTOMATA. Pp. 83 101. 



Segmentation and formation of the layers, pp. 83 86. Mesoblast and noto- 

 chord, pp. 86, 87. General history of the development, pp. 87 97. Metamor- 

 phosis, pp. 97 100. Myxine, p. 100. 



CHAPTER VI. GANOIDEI. Pp. 102 119. 



Acipenser, pp. 102 no. Segmentation and formation of the layers, pp. 102 

 104. General development of the embryo and larva, pp. 104 1 10. Lepidosleus, 

 pp. 111119. Segmentation, pp. in, 112. General development of embryo and 

 larva, pp. 1 1 2 1 19. General observations on the embryology of Ganoids, p. 119. 



CHAPTER VII. AMPHIBIA. Pp. 120 144. 



Oviposition and impregnation, pp. 120, 121. Formation of the layers, pp. 

 I2I 124 . Epiblast, pp. 125127. Mesoblast and notochord, pp. 128, 129. 

 Hypoblast, pp. 129131. General groivth of the embryo, pp. 131 143. Anura, 

 pp. 131 141. Urodela, pp. 141 143. Gymnophiona, p. 143. 



