CONTENTS 



PAGE 



Table of the Sub-kingdoms and Classes of Animals 2 



INTRODUCTION. 



CHAPTER I. 



On the Position of the Mollusca in the Animal Kingdom. 

 — Characters of the four primary groups ; — Yertebrata — 

 Mollusca — Articulata — Radiata. Their equal antiquity ... 3 



CHAPTER II. 



Classes of the Mollusca. — 1. Cephalopoda. — 2. Gasteropoda. 

 — 3. Pteropoda. — 4. Brachiopoda. — 5. Conchifera. — 6. 

 Tunicata G 



CHAPTER III. 

 Habits and Economy of the Mollusca. — Sedentary tribes, 

 their mode of attachment ; locomotive tribes, their means 

 of progression ; situations frequented by shell -fish. — Food : 

 vegetable- infusorial- and animal-feeders. — Use of shell-fish 

 to other animals for food ; use of shells for ornamental and 

 other purposes ; prices of shells. — Duration of molluscous 

 animals ; tenacity of life ; fecundity ; oviposition 10 



