CHAPTER XIV. Hirudinea (leeches)

HIRUDINEA (LEECHES)

INTRODUCTION—ANATOMY—REPRODUCTION—CLASSIFICATION—RHYNCHOBDELLAE AND GNATHOBDELLAE 392

GEPHYREA AND PHORONIS

CHAPTER XV

GEPHYREA

INTRODUCTION—ANATOMY—DEVELOPMENT—SIPUNCULOIDEA—PRIAPULOIDEA —ECHIUROIDEA—EPITHETOSOMATOIDEA—AFFINITIES OF THE GROUP 411

CHAPTER XVI

PHORONIS

HISTORY—HABITS—STRUCTURE—REPRODUCTION—LARVA—METAMORPHOSIS—LIST OF SPECIES AND LOCALITIES—SYSTEMATIC POSITION 450

POLYZOA

CHAPTER XVII

POLYZOA

INTRODUCTION—GENERAL CHARACTERS AND TERMINOLOGY—BROWN BODIES—HISTORY —OUTLINES OF CLASSIFICATION—MARINE POLYZOA—OCCURRENCE—FORMS OF COLONY AND OF ZOOECIA—OVICELLS—AVICULARIA—VIBRACULA—ENTOPROCTA 465