66 



THE ROYAL SOCIETY OF CANADA 



Melosira distans-W.S. 



" orichalcea Ken. 



sulcata Ehr. 

 '' vaiians-Ag. 

 " subflcxilis Kutz. 



Jurghcnsii Ag. 

 " marina 



Family 11, Biddulpheœ. 



Biddulphia aurita-Bi eb. 



Bailey i-W.S. 

 " Roperiana-Gi*ev. 



" rhombus -Ehr. 



pulchella-Gr. 

 " Ia3vis-Ehr. 



Triceratium alternans-Ehr. 

 " sculptum?-Schad. 



Isthmia enervis-Ehr. 



nervosa-S.B.D. 



Family 12. 



Auliscus ccelatus-Ball. 

 " sculptus-Ralfs. 



Eupodisceœ. 



Family 13. Heliopeltœ. 



Actinoptychus undulatus-Kutz. 

 " subtilis-Greg. 



* planus 



Family 14. Coscinodisceœ. 



Hyalodiscus subtilis-Bail. 

 Cyclotella compta-Kg. 



" Kutzingiana Thw. 



" Meneghiniana-Kg. 



" striata-Thw. 



Actinocyclus crassus-W.S. 



Coscinodiscus oculus-iridis 



* Americana 



" centralis-Ehr. 



" concinnus-W.S. 



" relatus 



Coscinodiscus asteromphalus-Ehr. 



" eccentricus-Ehr. 



" lineatus-Grun. 



" marginatus-K.B. 



" minor-Ehr. 



" minutus 



" radiatus-Grun. 



" subtilis-Ehr. 



" nitidus- Gray. 



" pellucida-Grun. 



" griseus-Grev. 



" concavus-Grev. 

 Pyxidicula compressa-Bail. 

 Stephanodiscus Niagarœ-Ehr. 



