Content* xiii 



PAGE 



Family 8. Palmellaceae ........ 239 



Sub-family I. PALMELLE^E ...... :j|o 



Palmella, Palmodactylon, Schizochlamys, Sphserocystis 



Sub-family II. TETRASPORE.E ...... -2\:>, 



Tetraspora, Apiocystia 



Sub-family III. GLCEOCYSTIDE^E ...... -i \ \ 



Glceocystis, Dactylothece, Palmodictyon, Botrydina 



Class 4. HETEROKONT^E, p. 248. 



Order I. CONFERVALES ........ 249 



Family 1. Chlorotheciaceae ....... 250 



Stipitococcus, Characiopsis, Mischococcus, Oodesmus 



Family 2. Tribonemaceae ....... 253 



Chlorobotrys, Ophiocytium, Tribonema, Bumilleria 



Family 3. Botrydiacese ........ 258 



Botrydium 



Class 5. BACILLARIE^E, p. 260. 



Order I. CENTRIC^ ........ 273 



Sub-order 1. DISCOIDE.E ........ 274 



Family 1. Melosiracese . . . -74 



Melosira 

 Family 2. Coscinodiscacese ....... 276 



Cyclotella, Stephanodiscus, Coscinodiscus 



Sub-order 2. SOLENOIDE.E ....... ^77 



Family 1. Rhizosoleniacese . 



Rhizosolenia, Cylindrotheca 



Order II. PENNATJ5 .... 279 



Sub-order 1. FRAGILARIOIDE^ . . 280 



Family 1. Tabellariaceae . . . 281 



Tetracyclus, Tabellaria, Diatomella, Denticula 



Family 2. Meridionacese 



Meridion 

 Family 3. Diatomacese . 



Diatoma 

 Family 4. Fragilariaceae 



Fragilaria, Synedra, Asterionella 



Family 5. Eunotiaceae . 

 Ceratoneis, Eunotia 



