CONTENTS OF VOLUME II. 



CHAPTER I. CEPHALOCIIORDA. Pp. 1 7. 



Segmentation and formation of the layers, pp. 1, 2. Central nervous system, 

 pp. 3, 4. Mesoblast, p. 5. General history of larva, pp. 5 7. 



CHAPTER II. UROCIIORDA. Pp. 8 32. 



Solitaria, pp. 8 18. Development of embryo, pp. 8 13. Growth and struc- 

 ture of free larva, pp. 13 16. Retrogressive metamorphosis, pp. 16 18. Seden- 

 taria, p. 19. Natantia, pp. 1923. Doliolidoe, pp. 23, 24. Salpida:, pp. 2428. 

 Appendicularia, p. 28. Metagenesis, pp. 28 31. 



CHAPTER III. ELASMOBRANCHII. Pp. 33 54. 



Segmentation and formation of the layers, pp. 3338. Epiblast, pp. 38, 39. 

 Mesoblast, pp. 3942. Hypoblast and notochord, pp. 4245. General features 

 of the embryo at successive stages, pp. 45 51. The yolk-sack, pp. 51 54. 



CHAPTER IV. TELEOSTEI. Pp. 55 67. 



Segmentation and formation of the layers, pp. 55 58. General history of the 

 layers, pp. 58 61. General development of the embryo, pp. 61 66. 



CHAPTER V. CYCLOSTOMATA. Pp. G8 83. 



Segmentation and formation of the layers, pp. 68 71. Mesoblast and noto- 

 chord, p. 71. General history of the development, pp. 72 80. Metamorphosis, 

 pp. 8082. Myxine, p. 82. 



CHAPTER VI. GANOIDEI. Pp. 8498. 



Acipenser, pp. 84 91. Segmentation and formation of the layers, pp. 8486" 

 General development of the embryo and larva, pp. 86 91. Lepidosteits, pp. 91 

 98. Segmentation, pp. 91, 92. General development of embryo and larva , 

 pp. 9298. General observations on the embryology of Ganoids, p. 98. 



CHAPTER VII. AMPHIBIA. Pp. 99119. 



Oviposition and impregnation, pp. 99, 100. Formation of the layers, pp. 100 

 -103. Epiblast, pp. 103105. Mesoblast and notochord, pp. 105, 106. 

 Hypoblast, pp. 107, 108. General growth of the embryo, pp. 108 118. Anura, 

 pp. 108116. Urodela, pp. 116118. Gymnophiona, p. 118. 



