IV 



Page 



CHAPTER 4. The Nervous System 66 



The Brain 66 



The Cranial Nerves. 68 



CHAPTER 5. The Skin 73 



Dermal Canals and Sense Organs 74 



Minute Structure of the Skin, Dermal Tubes, and Sense Organs .... 79 



CHAPTER 6. Embryology 84 



CHAPTER 7. Structure of Phyllonella solece 93 



PART III. 



BlONOMICAL. 



CHAPTER 1. Geographical Distribution 99 



CHAPTER 2. Habits, Food, &c 101 



Food 105 



Parasites. . . 108 



Enemies : 109 



CHAPTER 3. Colour 110 



CHAPTER 4. Breeding 114 



CHAPTER 5. Development and Growth 119 



PART IV. 



ECONOMICAL. 



CHAPTER 1. Artificial Propagation 129 



CHAPTER 2. The Sole Fishery .137 



CHAPTER 3. Practical Measures 142 



