CHAPTER V

REPRODUCTION--DEPOSITION OF EGGS--DEVELOPMENT OF THE FERTILISED OVUM--DIFFERENCES OF SEX--DIOECIOUS AND HERMAPHRODITE MOLLUSCA--DEVELOPMENT OF FRESH-WATER BIVALVES 123

## CHAPTER VI RESPIRATION AND CIRCULATION--THE MANTLE 150

## CHAPTER VII ORGANS OF SENSE: TOUCH, SIGHT, SMELL, HEARING--THE FOOT--THE NERVOUS SYSTEM 177

## CHAPTER VIII THE DIGESTIVE ORGANS, JAW, AND RADULA: EXCRETORY ORGANS 209

## CHAPTER IX THE SHELL, ITS FORM, COMPOSITION, AND GROWTH--DESIGNATION OF ITS VARIOUS PARTS 244

## CHAPTER X GEOGRAPHICAL DISTRIBUTION OF LAND AND FRESH-WATER MOLLUSCA--THE PALAEARCTIC, ORIENTAL, AND AUSTRALASIAN REGIONS 277

## CHAPTER XI GEOGRAPHICAL DISTRIBUTION OF LAND MOLLUSCA (_continued_)--THE ETHIOPIAN, NEARCTIC, AND NEOTROPICAL REGIONS 328

## CHAPTER XII DISTRIBUTION OF MARINE MOLLUSCA--DEEP-SEA MOLLUSCA AND THEIR CHARACTERISTICS 360

## CHAPTER XIII CLASS CEPHALOPODA 378

## CHAPTER XIV CLASS GASTEROPODA--AMPHINEURA AND PROSOBRANCHIATA 400

## CHAPTER XV CLASS GASTEROPODA (_continued_): OPISTHOBRANCHIATA AND PULMONATA 427

## CHAPTER XVI CLASSES SCAPHOPODA AND PELECYPODA 444

BRACHIOPODA (RECENT)

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