INTRODUCTION 1
ERRATA, PART 1
Key to Classes 31
KEY TO THE ORDERS OF THE CHLOROPHYCEAE 4
ORDER ULOTRICHALES 6
FAMILY ULOTRICHACEAE 6
FAMILY SCHIZOMERIDACEAE 15
ORDER MICROSPORALES 15
FAMILY MICROSPORACEAE 16
ORDER CYLINDROCAPSALES 19
FAMILY CYLINDROCAPSACEAE 19 l
ORDER SPHAEROPLEALES 20
FAMILY SPHAEROPLEACEAE 20
ORDER CHAETOPHORALES 21
FAMILY PROTOCOCCACEAE 22
FAMILY COLEOCHAETACEAE 23
FAMILY HELICODICTYACEAE 27
FAMILY TRENTEPOHLIACEAE 27
FAMILY CHAETOPHORACEAE 32
ORDER SCHIZOGONIALES 43
FAMILY SCHIZOGONIACEAE 43
ORDER SIPHONALES 43
FAMILY PHYLLOSIPHONACEAE 44
FAMILY DICHOTOMOSIPHONACEAE 44
ORDER CLADOPHORALES 45

FAMILY CLADOPHORACEAE 45
ORDER OEDOGONIALES 51
FAMILY OEDOGONIACEAE 51
APPENDIX I. NOMINA EXCLUDENDA 127
APPENDIX II. EDAPHIC FORMS 130
APPENDIX III. NOMINA ADDENDA 130
BIBLIOGRAPHY - LITERATURE CITED 131
INDEX 157
PLATES 164