204 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



Potamogeton pectinatus L. 



No doubt other Potamogetons are to be found. 



Chara and Nitella were found only in water less than one foot in depth, but 

 may occur at greater depths. 



CYANOPHYCEAE. 



Chroococcus turgidus (Kutz) Naeg. 

 C. turicensis (Naeg) Hansg. 



Both of the above are frequent in washings from submerged plants col- 

 lected in muddy bays. 

 Gleocapsa sp. In washings from submerged moss from Go Home River at 



Chute. 

 Aphanocapsa Grevillei (Hass) Rab. 

 Aphanothece pallida (Rab) . 



On Chara from Louden's Bay. 

 A. stagnina (Spring) A. Br. 

 Gonphosphaeria aponina Kuetz. 



Clathrocystis aeruginosa. (Kuetz) Henfrey. In floating plankton. 

 Coelosphaerium Kuetzingeanum Nag. 



In all surface collections made with plankton net in quiet waters. 

 Merismopedium glaucum (Ehren) Nag. 



In shallow bays of warm water. 

 Eucapsis alpina CI. & Sh. 

 Oscillatoria limosa Agardh. 



In surface plankton in steamer channel. 

 Lynbya sp. in scrapings from submerged stones in Gap, Giant's Tomb. 

 Scytonema Naegelii Kg. (Tolypothrix penicillata) (Agardh) Thuret. 



In scrapings from rocks. Eraser's Channel. 

 S. crispum Bornet. 



Plentiful, in scrapings from submerged rocks. 

 Nostoc comminutum Kutz. 



Common in surface collections with the next. 

 Anaboena flos aquae. Kutz. 

 Dichothrix horsfordii Barnet. 

 Rivularia dura. Roth. 



In scrapings from rocks. Eraser's Channel. 

 R. echinulata (Smith) Barnet. 



On culms of Scirpus. Go Home River near the Chute. 

 Stigonema mamillosum Agardh. 



CHLOROPHYCEAE 



Volvocales. 



Chlamydomonas pulvisculus Ehrb 



Common in surface plankton with the two following. 



