Eight marine red algae are reported from the Bermuda islands for the first time (Balliella pseudocorticata, Champia parvula var. prostrata, Diplothamnion jolyi, Grallatoria reptans, Heterosiphonia crispella var. laxa, Polysiphonia tongatensis, P. flaccidissima and Wrangelia argus) and three others represent poorly known taxa from the islands (Halydictyon mirabile, Polysiphonia exilis, P. sphaerocarpa). A lectotype is designated for Champia parvula var. prostrata L.G.Williams. A unique, net-forming Hydrolithon farinosum from deep water is described, and transfer of a variety of Fosliella farinosa is made to Hydrolithon farinosum as H. farinosum var. chalicodictyon (W.R.Taylor) C.W.Schneid. et Searles comb. nov. A precise explanation of the repeating branching pattern of offshore Bermuda specimens of Herposiphonia secunda highlights the taxonomic confusion associated with this pantropical species and Polysiphonia tongatensis is shown to be the correct name for Atlantic and Pacific Ocean specimens previously attributed to P. eastwoodiae.