158 THE ROYAL SOCIETY OF CANADA 



Coscinodiscus excentricus, 

 radiatus, 

 griseus, 

 "Cymbella gastroides, 

 Diatoma vulgare, 

 Ditylum Brightwellii, 

 Epithemia zebra, 

 Fragillaria capucina, 

 Gomphonema, 

 Grammatophora marina, 



serpentina, 

 Hyalodiscus laevis, 



subtilis, 

 Licmophora Lyngbyei, 

 flabellata, 

 Mastogloia exigua, 

 • Melosira Jurgensii, 



nummuloides, 

 sulcata, 

 Borreri, 

 Navicula aspera, 

 bombus, 

 directa, 

 elliptica, 

 forcipata, 

 Hennedyi, 

 humerosa, 

 Lyra, 



palpebralis, 

 Smithii, 

 viridis, 

 Nitzschia Tryblionella, 

 vermicularis, 

 longissima (Nitzschiella) , 

 scalaris, 

 sigma, 

 Plagiogramma Gregoryanum, 

 Pleurosigma angulatum, 



intermedium, 

 fasciola, 

 Rhabdonema arcuatum, 

 Rhoicosphenia cur va ta, 

 Rhizosolenia se ti géra. 



