178 



* Eunotia amphinxjs 



* Monodnn 



* q ulnar la 



* Zitbra 



— Gallionella aurichiilcea 



* crenata 



* decussala 



* dislans 



* ferruginea 



* granulala 



* procera 



* tenerriina 



* Gomphnnema gracile 



* Hirriantidium Arcus 



— Navicula An^phishaena 



* Semen 

 —• Silicula 



* Pinnularia arnphinxjs 



* ajfinis 



* bnrealis 



* viridis 



* viridula 



* Podosphenia Pupula 



* Synedra Ulna 



— Tabeilaria Pinnularia 



* Trachelomnnas laevis 



Phytülitharien 17. 



* Amphidiscus Rolula 



* iruncaius 



* Assula (silicea) hexago- 



na umbonata 



* Lithodontium furcalum 



