CONTENTS 
PREFACE é : F ; ; ; : : 5 E 
SCHEME OF THE CLASSIFICATION ADOPTED IN THIS Book . 5 
HEMICHORDATA 
COUSL/NTEMMTD TE IL 
CHORDATA AND VERTEBRATA — HEMICHORDATA — ENTEROPNEUSTA — EX- 
TERNAL CHARACTERS AND Habsirs-——SrrRuctuRE—GENERA— DEVELOP- 
MENT—PTreROBRANCHIA—CEPHALODISCUS AND RHABDOPLEURA—PHORO- 
NIDEA— PHORONIS AND ACTINOTROCHA—AFFINITIES OF THE HEmMI- 
CHORDATA 
TUNICATA 
CHAPTER II 
INTRODUCTION—OUTLINE OF HiIsTORY—STRUCTURE OF A TYPICAL ASCIDIAN 
—EMBRYOLOGY AND LIFE-HISTORY 
CHAPTER Til 
CLASSIFICATION: LARVACEA — APPENDICULARIANS — STRUCTURE, ETC. —- 
ASCIDIACEA —SIMPLE ASCIDIANS—SPECIFIC CHARACTERS—COMPOUND 
ASCIDIANS — GEMMATION — MrrosomaTa — HoLosomaTa — PYROSOMA- 
TIDAE—THALIACEA—DOLIOLIDAE—SALPIDAR—GENERAL CONCLUSIONS—- 
PHYLOGENY 
CEPHALOCHORDATA 
CHAPTER IV 
INTRODUCTION eG ENERAL CHARACTERS — ANATOMY OF AMPHIOXUS — 
EMBRYOLOGY AND LIFE-HISTORY— CLASSIFICATION oF CEPHALOCHORDATA 
—SPECIES AND DISTRIBUTION : 
vil 
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63 
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