Abstract
A revised checklish of 354 species, subspecies and varieties of benthic marine algae from eastern Canada is given, consisting of 128 Rhodophyceae, 128 Phaeophyceae, 90 Chlorophyceae, 7 spp. of Vaucheria (Xanthophyceae) and 1 sp. of Phaeosaccion (Chrysophyceae). Records for the entire coastline from Cape Chidley, Labrador, in the north to the New Brunswick-Maine border in the south are included, as well as from Anticosti Island, Magdalen Island, Sable Island, and St. Pierre and Miquelon. Additions include Waerniella lucifuga (Kuck.) Kylin; Phloeospora curta (Fosl.) Jaasund; Striaria attenuata (Grev.) Grev.; Fucus distichus L. ssp. anceps (Har. et Ward ex Cam.) Powell (Phaeophyta); Pilinia ? rimosa Kutz. and Tellamia contorta Batt. (Chlorophyta).