334 



Gesammtsitzung 



Gomphonema gracile 

 Himantidium gracile 

 ? 



* Lysicycüa Vogelii nov. Gen. 

 Navicula Amphishaena 



* umbilicala n. sp. 

 Pinnularia amphioxys 



inaequalis 

 viridula 

 Pleurosiphonia affinis 

 Stauronei's dilatata 

 Stauroptera trinodis 

 Surirella clathrata 



Craticula (major) 

 Synedra acuta 



Enlomon 

 U/na 

 Trachelomonas laevis 



25 I 11 17 I 16 



Phytolitharien: 72. 

 Amphidiscus clavatus 

 obtusus 



asterocephalus? 

 amblytrachys 

 Assula umbonata laevis 

 aspera 

 Lithodermatium gjrosum 

 Lithodontium Aculeus 



angulatnm 

 Bursa 

 curvatum 

 * denticulatum n. sp. 



+ — + 



— + 



+ — + 



— + 



— — + 

 + — — 



— + + 



— + 



+ — + 



+ — + 

 + 



— + -f 



