TABLE OF CONTENTS 



PAGE 



DEFINITION OF OLIGOCHAETA . , 



PAET I. THE ANATOMY OF THE OLIGOCHAETA. 



HISTORICAL NOTE i 



THE BODY-WALL AND EXTERNAL CHARACTERS 2 



THE NERVOUS SYSTEM 18 



COELOM 25 



NEPHHIDIA . 31 



ALIMENTARY CANAL 53 



VASCULAR SYSTEM 64 



BLOOD-GLANDS 77 



RESPIRATORY ORGANS 81 



REPRODUCTIVE SYSTEM 84 



GEOGRAPHICAL DISTRIBUTION 148 



PAET II. SYSTEMATIC. 



THE CLASSIFICATION OP THE OLIGOCHAETA 155 



PHYLOGENETIC ARRANGEMENT OF THE OLIGOCHAETA 162 



DESCRIPTIONS OF GENERA AND SPECIES ...... 174 



GROUP APHANEURA 176 



FAMILY AEOLOSOMATIDAE 176 



GROUP MICRODHILI . . 187 



FAMILY PHREOHYCTIDAE 187 



FAMILY MONILIGASTHIDAE ' . . . . 192 



b 



