THE AMAZONS AND ITS TBIBUTABIES. 129 



COSMABIUM PULCHEBBIMUM, Nord. PllTUS. 



C. pseudo-co^natum, Nord. Montealegre. 



C. globosum, Bulrh. Montealegre. 



C. gbanatum, Breb. Purus. 



C. yenustum, Breb. Purus. 



Xanthidium beguxabe, Nord. Montealegre. 



Aetheodesmus bifidus, Breb. Montealegre. 



Stattbastbum abistifebtdi, Balfs. 



S. gbacile, Balfs. 



S. quadbangflabe, Balfs, var. /3. attenuatum, Nord. Mon- 

 tealegre. 



S. ineqttale, Nord. Montealegre. 



Clostebixjm Pbitchabdianum, Archer. Purus. 



C. pabyttlum, Naeg. Montealegre. 



C. ixcubyum, Breb. Montealegre. 



Doctdium mlntttth, Balfs. Montealegre. 



Tetmemobtjs gbanulatus, Breb. Montealegre. 



Penium digitus, Ehrenb. Montealegre. 



P. oblongum, Be Bary. Montealegre. 



P. navicula, Breb. Montealegre. 



P. margabitceuh, Ehrenb. Montealegre. 



DlATOMACEiE. 



In compiling the following list I have received important 

 assistance from the Rev. G. Davidson, of Logie Coldstone. 



There is such difference of opinion regarding specieo of Eunotia, 

 that I prefer giving in one tabular list the forms observed in 

 various materials collected by Professor Trail. 



Eunotia monodon, Ehrenb. 

 E. diodon, Ehrenb. 

 E. triodon, Ehrenb. 

 E. tetraodon, Ehrenb. 

 E. quaternaria, Ehrenb. 

 E. quinaria, Ehrenb. 

 E. heptodon, Ehrenb. 



Eunotia septena, Ehreb. 

 E. enneodon, Ehrenb. 

 E. hendecaodon, Ehrenb. 

 E. zygodon, Ehrenb. 

 E. declivis, Ehrenb. 

 E. nodosa, Ehrenb. 

 E. sella, Ehrenb. 



