CONTENTS OF VOL. I 



PAGE 



BIBLIOGRAPHY xvii 



INTRODUCTION ... 1 



PHYLOGENY OF THE GENERA OF DESMIDS . 22 



ORDER CONJUGATE . .23 



FAMILY DESMIDIACE^E -3 



SUB-FAMILY I. SACCODERM.E . 29 



TRIBE 1. GONATOZYG.E . 2!> 



GENUS 1. GONATOZYGON . 29 



2. GENICULARIA . 35 

 TRIBE 2. SPIROT^NIE^E . 

 GENUS 3. SPIROT^NIA 



4. MESOT^NIUM 



5. CYLINDROCYSTIS . 57 



6. NETRIUM '! 

 SUB-FAMILY II. PLACODERM^E "<. 



TRIBE 3. PENIE^E 71 



GENUS 7. PENIUM . 71 



TRIBE 4. CLOSTERI.E 1^ )( J 



GENUS 8. ROYA . 106 



9. CLOSTERIUM . 109 



TRIBE 5. COSMARIE.E . 192 



GENUS 10. DOCIDIUM 193 



11. PLEUROT^NIUM . 197 



12. TETMEMORUS 21t'- 







