[bailey-mackay] diatoms FROM VANCOUVER ISLAND, B. C. 157 



Euodia Janischii, 



Eucampia zodiacus, 



Eunotogramma bivitatum, 



Fragillaria Pacifica (Opephora Pacifica==var. O. Swartzii), 



Glyphodesmis Williamsoni, 



Grammatophora maxima, 



G. Japonica, 



Melosira Sol, 



M. undulata, 



Navicula (many species), 



Pleurosigma Olympianum, 



Opephora Swartzii, 



Raphoneis Archeri, 



Synedra undulata. 



IV. Geographical Distribution. 



Of the forms listed as found about Vancouver Island the following 

 are common to the Atlantic and Pacific coasts of Canada: 



Acnanthes brevipes, 

 longipes, 

 subsessilis, 

 Actinoptychus undulatus, 

 Amphora costata, 



ovalis, 

 Amphiprora alata, 



lepidoptera, 

 Biddulphia aurita, 



Roperiana, 

 laevis, 

 Chaetoceros boréale, 



cryophyllum, 

 crinitum, 

 decipiens, 

 didymum, 

 dichaeta, 

 Peruvianum, 



sociale, . • 



Cocconeis scutellum, 

 pediculus, 

 Coscinodiscus asteromphalus, 

 concinnus, 

 centralis, 



