v te . > A Catalogue of the Marine Algae of the Canadian Arctic R.K.S. Lee Botany Division, National Museum of Natural Sciences, Ottawa. National Museum of Natural Sciences Publications in Botany, No. 9 Published by the National Museums of Canada © National Museums of Canada 1980 National Museum of Natural Sciences National Museums of Canada Ottawa, Canada Catalogue No. NM 95-9/9 P0987654321 Y79 Printed in Canada ISBN 0-662-00010-2 ISSN 0068-7987 Musée national des Sciences naturelles Publications de botanique, n° 9 Publié par les Musées nationaux du Canada © Musées nationaux du Canada 1980 Musée national des Sciences naturelles Musée nationaux du Canada Ottawa, Canada N° de catalogue NM 95-9/9 T0987654321 A79 Imprimé au Canada ERRATUM Add 2 to each number in the index to obtain the correct page reference, National Museums National Museum of Canada of Natural Sciences Ottawa 1980 Publications in Botany, No. 9 A Catalogue of the Marine Algae of the Canadian Arctic R. K. S. Lee Publications de botanique, n° 9 Musées nationaux Musée national du Canada des Sciences naturelles ae: ee » diene Contents Summary 3 Introduction 5 History 6 Aspects of the Plant Life 8 Methods and Content 10 Acknowledgements 15 Catalogue 17 Chlorophyta 17 Phaeophyta 30 Rhodophyta 50 Collection Locations 67 References 74 Index to Species 79 Illustrations Figure 1. Map of the Canadian Arctic 4 Summary Benthic marine algae collected by scuba and dredging from 105 sites mostly in the north- ern and southwestern part of the Canadian Arctic are identified and catalogued with se- lected literature references, habitat notes, and frequency of occurrence. Each species is provided with a list of collection sites and herbarium reference numbers to voucher specimens. Included are species distribution records that have been reported in the litera- ture. Of the 183 species and varieties from a total of 113 genera of Chlorophyta, Phaeo- phyta, and Rhodophyta, 37 are newly re- ported from the Canadian Arctic. Figure 1. Map of the Canadian Arctic with major bodies of water mentioned in the text-in relation to areas from which specimens were collected. Se 2 = L") Ss Yuerhe he ° ‘ Introduction This paper is a compilation of available knowledge on the species composition, habitat, and distribution of the benthic marine algae of the Canadian Arctic (Fig. 1). Kjellman’s (1883) work of nearly a century ago, “The Algae of the Arctic Sea’, includes eight papers dealing with collections made from the eastern section of the Canadian Arctic. Taylor’s (1957) manual on algae of the northwestern Atlantic is the only other study that has a compilation of species records for the Canadian Arctic. Besides a few new rec- ords, it includes data from six reports pub- lished after Kjellman’s work, all but one of which are concerned with locations within the eastern Canadian Arctic. The references available to Kjellman and Taylor were mostly of short lists of species that were usually without habitat or collection data. They were reports made by phycologists upon receiving collections made by participants of sailing expeditions whose primary purpose was geographic exploration. Nearly all of these incidental — very likely drift — collections came from the eastern sector. With the few studies that followed similarly limited at least in geographical scope, there has never been a source of specimens that could be considered sufficiently adequate in any ef- fort to compose a floristic knowledge of the Canadian Arctic algae. The source material for this study is from a collecting survey conducted during 1967 to 1976 that involved more than 105 sites scat- tered through most of the Canadian Arctic. The object was to determine what species are present and where they occur. History As noted in the Introduction, most of the available references on marine algae in the Canadian Arctic are invariably linked with the historic geographical discovery and ex- ploration of the region. In 1819, his first of three expeditions to the Arctic, Captain John Franklin was sent by the British Admiralty to explore the mainland coast west of Boothia Peninsula by an over- land route. Starting from York Factory in Hudson Bay, the expedition made an ardu- Ous journey westward for nearly a year before reaching Fort Enterprise, north of Great Slave Lake. In 1821, travelling in two canoes, they explored and mapped the south shores of Coronation Gulf and Dease Strait, including a part of Bathurst Inlet. Among those involved was John Richardson, sur- geon and naturalist, who later gave a botani- cal account of the expedition. He (1823) re- corded five species of algae, of which one, Fucus ceranoides, was marine. His comment about the Fucus (probably a F. distichus) was that “exclusive of a Conferva, and the fragment of a Floridea (Lam.), this was the only alga we observed in the Arctic Sea.’’ Richardson secured and retained this and other biological data while participating ina vexing journey that was marked not only by foreseen hardships of the wilderness, but also by starvation, discontent, and murders. Another very early collection was that made during Captain Sir Edward Parry’s second Canadian Arctic voyage of 1821- 1823. In search of a Northwest Passage, he was in command of the Fury and the Hecla which sailed into Hudson Strait and Foxe Channel to Repulse Bay and then northward into Foxe Basin. All of the botanical material collected was given to W.J. Hooker (1825), who identified nine algal species, nearly all with the annotation “floating on the Sea about the middle of Hudson’s Strait”’. The first report on Canadian Arctic algae to include specific locations and habitat information was made by Dickie (1852) based On specimens collected from Assistance Bay and Union Bay in Barrow Strait by Peter C. Sutherland, ship surgeon. Assistance Bay was a winter haven for the Admiralty brigs Lady Franklin and Sophia under the com- mand of a whaler, Captain William Penny, who had instructions to trace the voyage of the now missing Captain Sir John Franklin and his men on the Erebus and Terror. Among the algal material dredged from the bay was a large, foliaceous red alga which Harvey (1853, see also Dickie 1852) de- scribed as a new species. It was named Kal- lymenia pennyi (now Turnerella pennyi) in honor of the able Captain Penny. Dickie later published several additional papers, from 1853 to 1878, on materials he re- ceived from various British expeditions that entered Davis Strait, Baffin Bay, Prince Re- gent Inlet, and Nares Strait. Another early re- port was that of Harvey (1858), who similarly identified specimens collected during Brit- ish expeditions. Most of his material con- sisted of a Northumberland Sound and Queens Channel collection made by David Lyall, M.D., during the 1852-54 voyages of the Assistance and Pioneer led by Captain Sir Edward Belcher in the last of the ‘“‘Search for Franklin” expeditions to be sponsored by the British Government. Beginning with Ashmead (1864), with the advent of American and Canadian sponsored expeditions, reports on Canadian Arctic algae were being made by North American phycologists. Ashmead’s paper was based on specimens collected by Isaac |. Hayes, M.D., who was in command of the schooner United States on an American expedition to Smith Sound. Farlow (1879, 1886) produced species lists of the algae collected from Cumberland Sound by Ludwig Kumlien and from Ungava Bay by L.M. Turner. The paper by Setchell and Collins (1908) includes a James Bay collection that was made by William Spreadborough apparently for the National Herbarium of Canada. During the Canadian Arctic Expedition of 1913-18 to the western Canadian Arctic, Frits Johansen, zoologist, collected specimens from Alaska to Coronation Gulf that were later reported on by Collins (1927a). Johansen, whose col- lections are in the National Herbarium of Canada, later journeyed to Hudson Bay and James Bay and the specimens he obtained there were worked on by Howe (1927). Other phycological papers resulting from Canadian government activities were Collins (1927b) and Bell and MacFarlane (1933, 1938) chiefly on Hudson Strait and Hudson Bay algae, and Wheldon (1947) on a collection made by Nicholas Polunin in the eastern Canadian Arctic during 1934 and 1936. Rosenvinge (1926) made a_ significant study on the Greenland and Canadian Arctic algae collected for the most part by H.G. Simmons during the Second Norwegian Arc- tic Expedition of 1898-1902. Under the lead- ership of Captain Otto Sverdrup, the expedi- tion’s legendary vessel Fram. F. Nansen’s former ship, wintered in Rice Strait and Jones Sound over a four-year period. While sledding parties were discovering new is- lands west of Ellesmere Island, Simmons, who was a botanist and professor at Lund University, made an outstanding collection with extensive field notes, providing Rosenvinge with sufficient information for a discussion of the marine vegetation along with the catalogue of 61 species, half of which were new to the Canadian Arctic. An- other Danish phycologist, Sgren Lund, re- ported (1933) on the algae collected by G. Seidenfaden during the Godthaab Expedi- tion of 1928 to western Greenland and two locations in the Canadian Arctic, Craig Har- bour in Jones Sound, and Exeter Sound in northern Davis Strait. In contrast to the over- all incidental and geographically restricted bits of information available on algae in the Canadian Arctic, the adjacent Greenland algae had already been well-documented in comprehensive investigations made by Rosenvinge (1893, 1898), Jonsson (1904), and later Lund (1959). Up to 1954 — more than a century after John Richardson stepped on the shore of Coronation Gulf and wrote the first account of marine algae in the Canadian Arctic — no phycologist had ventured into Canadian Arc- tic waters. In 1954 and 1955, in conjunction with his study on the Labrador algae, Prof. R. T. Wilce, University of Massachusetts, gathered specimens and data on marine algal communities along the eastern side of Ungava Bay. His report (1959) is the first to be made by a phycologist as a direct result of his own field work in the Canadian Arctic. This ecological study, which includes spe- cies lists, was followed by others of a similar nature: Ellis and Wilce (1961) and Wilce (1968). A student of Dr. Wilce, R. W. Lee, spent a season at Mould Bay, Crozier Channel, and his research there resulted in a Master’s thesis (1966). Finally, in the course of the present species survey, | gave a general ac- count (1973) on ecological aspects of the Canadian Arctic marine algae. Aspects of the Plant Life A discussion on the general ecology of the marine algae of the Canadian Arctic was given in an earlier paper (Lee 1973). Briefly, with increasing severity of ice cover, not only is there a shortening of the photosynthetic growth period, but there is also an effective decrease in wave action and salinity of the surface water. As a result of stability of the water column, nutrient transport may be a critical problem. These factors, interde- pendent because of their cause and effect relationship, seem to dominate the character of the marine environment. Their effect on the arctic plant life is not known. If nothing else, at this rudimentary stage of our com- prehension of arctic marine ecology, they at least indicate environmental variability. Without pertinent field and laboratory stud- ies, we can only speculate. One of the points made in Lee (1973) was that the algal communities tend to be sepa- rated from each other because of the sporadic occurrence of suitable rocky sub- strates. Also mentioned was the presence of free-living communities lying on the silt and clay bottom of quiet bays. Subsequent scuba diving observations made at additional col- lecting sites revealed the presence of an- other, apparently more extensive, type of substrate. It is somewhat intermediate in that it is composed of mud (= silt and clay) with interspersed pebbles and cobbles. Sand is uSually mixed with the mud. A 1975 analy- sis of the predominately mud substrate at Byam Channel (P. McLaren, manuscript) showed an inclusion of 10-33% sand and 0-22% gravel to cobbles. The latter material, and at times other solid objects such as the shells of bivalves and barnacles, provides an adequate base for attachment of the larger benthic algae. The holdfast of a Laminaria, whether of the discoid or fibrous type, envelopes a single cobble or a few to many small stones. The anchorage afforded in situ was indicated by the light to at times heavy sediment burial of the holdfast of older plants. Another indi- cation of development in situ was that when a plant lay prone with a portion of its stipe in contact with the substrate, that part of the stipe sometimes had adventitious holdfasts. In a contrasting type of growth habit like that of Polysiphonia arctica, the rhizoidal filaments of this branching alga spread ina network over the loose substrate. These examples of attachment seem pos- sible only if the unconsolidated substrate re- mains stable in the absence of sufficiently strong currents. A mud and pebble substrate under calm water is a prevailing feature of severe sea-ice conditions. In such a habitat the only evident major disruption of the sub- strate is that caused by grounded ice blocks. (A minor disruption is furrowing by walruses in search of shellfish.) A block of ice scraping over a vegetation covered bottom leaves a conspicuous denuded path (see also McLaren 1975). It is an infrequent phe- nomenon, taking place only when the ice block is thick enough to reach the vegetation. There is a logical inverse relationship be- tween the degree of sea-ice severity and the length of the seasonal photosynthetic peri- od. Where the ice cover is 100% and perma- nent, as in some channels of the northwest- ern part of the Archipelago, there is no pho- toperiod and the underlying substrate lies barren. Where the 100% ice cover becomes broken, the following correlations between longevity of plant life and categories of broken ice conditions are predicted: 1. The frequency of break-up is irregular in that there is a year-to-year fluctuation: ephemeral vegetation. 2. There is an annual break-up but the open water interval is short: ephemeral vegeta- tion. 3. Annual break-up, occurring comparatively early in the year and lasting to a late freeze-up: overwintering vegetation (char- acteristic of the eastern region). When severe ice conditions prevail, as in many areas of the western section of the Archipelago, members of the benthic com- munity developing in one short photoperiod lack sufficient reserve food to last the pro- ceeding long dark period. The substrate is recolonized during a subsequent interval when the ice cover is broken and there is sunlight penetration through a crack in the ice or through broken ice fields*. The colon- izing plants undergo an increasingly sus- tained and perhaps rapid rate of growth as the available light extends toward a 24 hr period. A moderation of the long-lasting 100% ice cover condition to one of shorter duration provides for an extended growth season. Most of the eastern region of the Canadian Arctic can be placed in this category. Here * Multiyear ice can be transparent enough for light to pass through. Its effect on benthic life is not known. there is a greater diversity of species (Lee 1973), the plants are larger, the communities are extensive, and long-lived forms like coral- lines, Laminaria, and Agarum display a morphological development requiring more than a single season of growth. Overwinter- ing would not be possible without a degree of maturation sufficient to overcome the seasonal dark period. Evidence that there is a cessation of growth during the dark winter period was de- rived from scuba observations (including those of P. McLaren, pers. comm.) made during early ice break-up in the western part of the Archipelago. It was found that (1) there was a recent colonization of the substrate indicated by the presence of tiny sporelings to small, young plants and the absence of large or reproductive individuals, (2) the attached vegetation was limited to that part of the substrate above which the ice cover was broken, and (3) even at the end of the melting season (not at the same sites or season) the Laminaria plants were young and small-sized. These plants sometimes had 20-25 cm long blades with as many as 5 or 6 increments of growth. The apparent growth interruptions could conceivably be related to intervals when the often present shifting ice temporarily created dark periods. The basic premise here is that with light extinction there is no growth and the problem is one of survival to the next available photoperiod. Of some relevancy, several dark-culture experi- ments (more recently, Smayda and Mitchell- Innes 1974), involving marine diatoms and other microalgae, have shown that many spe- cies are capable of surviving 90 days or more in the dark. None displayed any growth ac- tivity, and for some species, short intervals of reillumination or a lower temperature pro- longed the dark-survival period. In the con- trasting stance, Wilce (1967) gives a discus- sion on the possible occurrence of hetero- trophy in arctic algae. The presence or absence of vegetation may also be related to differences in salinity. In colder regions a summer-long persistence of a low salinity surface layer formed from ice melt (a distinct halocline was sometimes observed by divers) could be a major reason for the lack of growth in the intertidal zone down to a depth of 3 m or more. As already pointed out (Lee 1973), ice scouring is not the actual cause for the overall absence of intertidal growth. Peterson (1962, 1966) had drawn the same conclusion in his study on the biology and distribution of Ba/anus balanoides and_ Littorina’ saxatilis in Greenland. According to scuba derived observations, most plant growth occurred within the depths of 2 and 15 m (water temperature ranges during the course of the survey were -0.7 to 9.3°C at 0 m, -1.5 to 9.0°C at 7-12 m). Fucus, when present, tended to be the dominant alga in the upper depths; Lamina- ria and crustose corallines at deeper depths. At some locations the separation of Fucus populations from those of Laminaria was clearly marked by a visible halocline. The deepest occurring macroscopic plants were Laminaria groenlandica, L. saccharina, and L. solidungula at 20-21 m at several sites, Agarum cribrosum, 21 m at Rigby Bay, and Clathromorphum compactum and _Litho- thamnium laeve, 27 m at Intrepid Bay. Methods and Content Specimens were collected from some 105 sites, located mostly in the northern and southwestern part of the Canadian Arctic, after eight field seasons during 1967 to 1976. Most of the collections were made during July and August, the peak ice-melt period. Other collection times were late June and early September, which for portions of the Canadian Arctic approximates the time of year when the sea ice starts to break and subsequently reform. From 1967 to 1970, subtidal specimens were collected by dredging, usually from a pneumatic boat powered by an outboard motor. Subsequent collections were by scuba techniques, start- ing with the wet suit then eventually utilizing the inflatable dry suit with antifreeze pre- cautions in the regulator system and a full- face mask equipped with transmitter and re- ceiver. Transportation to the collecting sites was by necessity almost exclusively by heli- copter. In addition to these museum-sponsored expeditions, an extensive collection made by scuba diving at 14 sites was provided by Pat- rick McLaren, Geological Survey of Canada, from his 1974 marine geology study of Byam Channel. This contemporaneous collection and another, significant because of the spe- cies involved, from a James Bay location by Fred N. Cowell, Polar Bear Provincial Park, were made in behalf of the museum and they have been incorporated into the survey. Specimens of these collections and those of others in the algal collection (CANA) of the National Museum of Natural Sciences are the basis of the New Records tabulation in the species catalogue. They can be identi- fied as follows: a. Numbers prefixed by DH are collections made by P. McLaren, with D. Frobel, S. McLean, and C. Locat. b. Hyphenated numbers beginning with 60, 62, 63, or 66 (they indicate the year) are collections made during expeditions of the Arctic Biological Station, Fisheries Research Board of Canada. c. Hyphenated numbers beginning with 74 (the year) are collections made by D. E. McAllister and J. Boom for the present study. d. Where the museum accession number (preceded by CANA) is given, the col- lectors were, for example, F. N. Cowell, and D. E. McAllister and J. G. Hunter. e. A few numbers are associated with the name of the collector: R. Coleman, H. 10 Crum, C. R. Harington, J. R. Riley, D. B. O. Savile, and J. W. Tyrrell. f. Numbers of four digits only are my own, which also represent scuba collections made by J. Boom, D. Kittle, R. Long, P. Newroth, and S. van Haarten. The CANA herbarium also contains an in- complete set of specimens collected during the Canadian Arctic Expedition of 1913-1918 by F. Johansen and reported on by Collins (1927a). A 1920 collection from Hudson Bay and James Bay (Howe 1927) also collected by Johansen, is in the CANA herbarium. Where a literature record can be associated with a herbarium specimen | have examined, the herbarium accession number has been cited along with the published reference. Also examined were Canadian Arctic (Rosenvinge 1926) and Greenland specimens in the Botanical Museum of the University of Copenhagen, the Botanical Museum of the University of Lund, the Swedish Museum of Natural History in Stockholm, and the Bo- tanical Museum of the University of Uppsala. For these the only ones cited are those that entailed a significant nomenclatural or taxo- nomic change. The catalogue is made up of 183 species to varieties, including 37 previously unknown from the Canadian Arctic, from a total of 113 genera of Chlorophyta, Phaeophyta, and Rhodophyta. Fifty-seven of the subgenera are members of the Chlorophyta, 68 are of the Phaeophyta, and 58, the Rhodophyta. Each taxon is annotated with taxonomic ref- erences (selected mostly for their arctic con- tent), general habitat information, and rec- ords of distribution. Unless indicated other- wise, remarks on the habitat are based solely On scuba derived observations. The locations of the distributional records are in a north to south and east to west arrangement within the major geographical categories of the EASTERN, SOUTHWEST- ERN, and NORTHWESTERN ' Canadian Arctic. The boundary of the eastern sector is from Robeson Channel to Cardigan Strait, Bellot Strait, Hudson Bay, and James Bay (Fig. 1). M’Clure Strait, Viscount Melville Sound, and Barrow Strait separate the north- west from the southwest. Only one of usu- ally several voucher specimens is cited from a collection made at a given site. The speci- mens are available for study in the National Herbarium, Botany Division of the National Museum of Natural Sciences, Ottawa. The following is a checklist of the species catalogued. Those in boldface are new records. CHLOROPHYCEAE Volvocales Palmellaceae Gloeocystis scopulorum Hansgirg Chlorococcales Characiaceae Codiolum gregarium A. Braun pusillum (Lyngbye) Kjellman Endosphaeraceae Chlorochytrium dermatocolax Reinke inclusum Kjellman schmitzii Rosenvinge Gomontia polyrhiza (Lagerheim) Bornet and Flahault Phyllosiphonaceae Ostreobium quekettii Bornet and Flahault Prasiolales Prasiolaceae Prasiola johanseni Collins Rosenvingiella polyrhiza (Rosenvinge) Silva Ulotrichales Ulotrichaceae Ulothrix flacca (Dillwyn) Thuret laetevirens (Hooker) Collins pseudoflacca Wille subflaccida Wille Ulvales Capsosiphonaceae Capsosiphon fulvescens (C. Agardh) Setchell and Gardner Percursariaceae Percursaria percursa (C. Agardh) Rosenvinge Monostromataceae Blidingia marginata (J. Agardh) P. Dangeard subsp. marginata subsp. subsala (Kjellman) Bliding minima (Nageli) Kylin var. minima var. ramifera Bliding Kornmannia leptoderma (Kjeliman) Bliding Monostroma arcticum Wittrock Ulvaceae Enteromorpha clathrata (Roth) Greville compressa (Linnaeus) Greville crinita (Roth) J. Agardh flexuosa (Wulfen) J. Agardh subsp. paradoxa (Dillwyn) Bliding groenlandica (J. Agardh) Setchell and Gardner intestinalis (Linnaeus) Link linza (Linnaeus) J. Agardh prolifera (O. F. Muller) J. Agardh Ulva lactuca Linnaeus rigida C. Agardh Ulvaria obscura (Kitzing) Gayral var. blyttii (Areschoug) Bliding oxysperma (Kutzing) Bliding Chaetophorales Chaetophoraceae Acrochaete repens Pringsheim Arthrochaete penetrans Rosenvinge Bolbocoleon piliferum Pringsheim Chaetobolus gibbus Rosenvinge Ectochaete leptochaete (Huber) Wille wittrockii (Wille) Kylin Entocladia viridis Reinke Epicladia flustrae Reinke Pringsheimiella scutata (Reinke) Marchewianka Pseudendoclonium submarinum Wille Pseudopringsheimia confluens (Rosenvinge) Wille fucicola (Rosenvinge) Wille Chroolepidaceae Pilinia endophytica Collins Acrosiphoniales Acrosiphoniaceae Urospora 11 mirabilis Areschoug wormskjoldii (Mertens) Rosenvinge Acrosiphonia arcta (Dillwyn) J. Agardh hystrix (Stromfelt) Jonsson Spongomorpha aeruginosa (Linnaeus) Hoek Cladophorales Cladophoraceae Rhizoclonium riparium (Roth) Harvey Chaetomorpha linum (O. F. Miller) Kutzing melagonium (Weber and Mohr) Kutzing Cladophora sericea (Hudson) Kutzing sp. PHAEOPHYCEAE Ectocarpales Ectocarpaceae Pilayella littoralis (Linnaeus) Kjellman Ectocarpus fasciculatus Harvey siliculosus (Dillwyn) Lyngbye Giffordia ovata (Kjellman) Kylin Laminariocolax tomentosoides (Farlow) Kylin Streblonema Stilophorae (Crouan and Crouan) Hamel Kolderupia maritima (Kjellman) S. Lund Phaeostroma parasiticum Bgérgesen pustulosum Kuckuck Ralfsiaceae Symphyocarpus Strangulans Rosenvinge Ralfsia cClavata (Harvey) Crouan and Crouan fungiformis (Gunner) Setchell and Gardner ovata Rosenvinge verrucosa (Areschoug) J. Agardh Sorapion kjellmanii (Wille) Rosenvinge Lithoderma fasticens Areschoug Pseudolithoderma extensum (Crouan and Crouan) S. Lund rosenvingii (Waern) S. Lund 12 subextensum (Waern) S. Lund Sphacelariales Sphacelariaceae Sphacelaria arctica Harvey cirrosa (Roth) C. Agardh plumosa Lyngbye radicans (Dillwyn) C. Agardh Tilopteridales Tilopteridaceae Haplospora globosa Kjellman Chordariales Myrionemataceae Dermatocelis laminariae Rosenvinge Hecatonema foecundum (Strémfelt) Loiseaux maculans (Collins) Sauvageau Leptonematella fasciculata (Reinke) Silva Microsporangium globosum Reinke Myrionema aecidioides (Rosenvinge) Sauvageau strangulans Greville Elachistaceae Elachista fucicola (Velley) Areschoug Chordariaceae Eudesme virescens (Carmichael) J. Agardh Chordaria flagelliformis (QO. F. Muller) C. Agardh Desmarestiales Desmarestiaceae Desmarestia aculeata (Linnaeus) Lamouroux viridis (O. F. Miller) Lamouroux Dictyosiphonales Striariaceae Isthmoplea sphaerophora (Carmichael) Kjellman Stictyosiphon tortilis (Ruprecht) Reinke Punctariaceae Litosiphon filiformis (Reinke) Batters Desmotrichum undulatum (J. Agardh) Reinke Punctaria glacialis Rosenvinge plantaginea (Roth) Greville Petalonia fascia (O. F. Muller) Kuntze Scytosiphon lomentaria (Lyngbye) C. Agardh Asperococcus echinatus (Mertens) Greville Omphalophyllum ulvaceum Rosenvinge Dictyosiphonaceae Coilodesme bulligera Stromfelt Dictyosiphon foeniculaceus (Hudson) Greville Laminariales Chordaceae Chorda filum (Linnaeus) Lamouroux tomentosa Lyngbye Laminariaceae Saccorhiza dermatodea (De la Pylaie) J. Agardh Laminaria agardhii Kjellman digitata (Hudson) Lamouroux groenlandica Rosenvinge longicruris De la Pylaie nigripes J. Agardh saccharina (Linnaeus) Lamouroux solidungula J. Agardh Agarum cribrosum Bory Alariaceae Alaria esculenta (Linnaeus) Greville grandifolia J. Agardh pylaii (Bory) Greville Fucales Fucaceae Fucus distichus Linnaeus subsp. distichus subsp. anceps (Harvey and Ward) Powell subsp. edentatus (De la Pylaie) Powell subsp. evanescens (C. Agardh) Powell vesiculosus Linnaeus Ascophyllum nodosum (Linnaeus) Le Jolis RHODOPHYCEAE Bangiales Bangiaceae Erythrotrichia carnea (Dillwyn) J. Agardh Erythrocladia irregularis Rosenvinge polystromatica P. Dangeard Erythropeltis discigera (Berthold) Schmitz var. flustrae Batters Porphyra miniata (C. Agardh) C. Agardh purpurea (Roth) C. Agardh Nemaliales Acrochaetiaceae Acrochaetium parvulum (Kylin) Hoyt Audouinella efflorescens (J. Agardh) Papenfuss hallandicum (Kylin) Woelkerling purpurea (Lightfoot) Woelkerling spetsbergense (Kjellman) Woelkerling Colaconema membranacea (Magnus) Woelkerling Cryptonemiales Dumontiaceae Dumontia incrassata (O. F. Muller) Lamouroux Neodilsea integra (Kjellman) Zinova Squamariaceae Peyssonelia johanseni Howe rosenvingii Schmitz Rhodophysema elegans (Crouan and Crouan) Dixon Halosacciocolax kjellmanii S. Lund lundii Edelstein Hildenbrandiaceae Hildenbrandia prototypus Nardo Corallinaceae Clathromorphum compactum (Kjellman) Foslie Lithothamnium foecundum Kjellman glaciale Kjellman laeve (Strémfelt) Foslie Phymatolithon laevigatum (Foslie) Foslie polymorphum (Linnaeus) Foslie Kallymeniaceae Callophyllis cristata (C. Agardh) Kutzing Kallymenia schmitzii De Toni Choreocolaceae Choreocolax odonthaliae Levring Harveyella mirabilis (Reinsch) Schmitz and Reinke Gigartinales Cruoriaceae Cruoria arctica Schmitz Cruoriopsis hyperborea Rosenvinge Petrocelis polygyna (Kjellman) Schmitz Sp. Solieriaceae Turnerella pennyi (Harvey) Schmitz Rhodophyllidaceae Rhodophyllis dichotoma (Lepeschkin) Gobi Phyllophoraceae Ahnfeltia plicata (Hudson) Fries Phyllophora truncata (Pallas) Newroth and Taylor Ceratocolax hartzii Rosenvinge Rhodymeniales Rhodymeniaceae Halosaccion 14 ramentaceum (Linnaeus) J. Agardh Rhodymenia palmata (Linnaeus) Greville Ceramiales Ceramiaceae Antithamnion americanum (Harvey) Farlow boreale (Gobi) Kjellman pylaisaei (Montagne) Kjellman Ceramium rubrum (Hudson) C. Agardh tenuissimum (Roth) J. Agardh Ptilota pectinata (Gunnerus) Kjellman plumosa (Hudson) C. Agardh Delesseriaceae Membranoptera alata (Hudson) Stackhouse denticulata (Montagne) Kylin Pantoneura angustissima (Turner) Kylin baerii (Postels and Ruprecht) Kylin Phycodrys rubens (Linnaeus) Batters Rhodomelaceae Polysiphonia arctica J. Agardh urceolata (Lightfoot) Greville Rhodomela confervoides (Hudson) Silva lycopodioides (Linnaeus) C. Agardh Odonthalia dentata (Linnaeus) Lyngbye ——$———_$ — ——— _ _———_ — SSS Lee Acknowledgements The degree of accomplishment of a survey of this type in the Canadian Arctic is dependent on the logistic support of various agencies. In 1967, when the survey was initiated, | was given full support by the Northern Services Division, Department of Indian Affairs and Northern Development, by arranging my par- ticipation on the annual Eastern Arctic Patrol on the C.C.G.S. C.D. Howe. For the field seasons of 1968 to 1970, | should like to single out the Polar Continental Shelf Proj- ect, Department of Energy, Mines & Re- sources, for its aircraft, boat, and other logistic support, without which | would not have been able to continue the survey. Even with financial support from the museum itself from 1973 to 1976, which pro- vided for helicopter chartering exclusively for the project, limited facilities and services in the Archipelago required planning and coordination with numerous agencies. For making available their field Support, | am grateful to these institutions and the staff involved: Polar Continental Shelf Project, Air Operations and Training unit and Supple- mentary Radio System unit of the Depart- ment of National Defense, Department of the Environment, Department of Indian Affairs and Northern Development, R.C.M.P., Brad- ley Air Services, Pan Arctic Oil, KAP Trans- port, Okanagan Helicopters, and Aero Arctic Ltd. My thanks to the curators of the herbaria mentioned in Methods and Content for their hospitality and aid during my visits, and to Patrick McLaren, Donald E. McAllister, and Fred N. Cowell for significant collecting ef- forts made in behalf of the survey. Finally, my deepest appreciation for the tireless ef- forts of fellow members of the various field parties, who were indispensable partici- pants as field aids, divers, or helicopter pilots. They are Randy Felix, Phursumba Sherpa, John Boom, Douglas Kittle, Ron Long, Peter Newroth, Stephen van Haarten, Dean Peterson, and Robert W. T. O’Connor. 15 6 y or ~~. \ ir. . Sa. ~ , Wy Bs < i - > Catalogue DIVISION CHLOROPHYTA Class Chlorophyceae Order Volvocales Family Palmellaceae Gloeocystis scopulorum Hansgirg Collins 1908, p. 155; Taylor 1957, p. 37. Eastern distribution. Literature records. Hudson Strait: Forbes Sound and False River Bay (Wilce 1959). Order Chiorococcales Family Characiaceae Codiolum gregarium A. Braun Kjeliman 1877, p. 56, pl. 5, figs. 1-9, as C. nordenskiéldianum; 1883, p. 318, as C. nor- denskiédidianum; Rosenvinge 1898, p. 118, as C. nordenskidldianum; Jonsson 1903b, p. 338, fig. 2; Taylor 1957, p. 40; Scagel 1966, p. 105, pl. 7, figs, F-M, pl. 8, figs. A-E. Collected at one locality where a few spec- imens were found among dense growths of Urospora penicilliformis and Rosenvingiella polyrhiza on intertida! bedrock. Rare. Most of the thalli could not be distinguished from C. nordenskidédldianum Kjellman, a species that Bgrgesen (1903) and, to a lesser extent, Kjellman (1883) and Jonsson (1903) had con- sidered likely to be a form of C. gregarium. This alga has been linked with Urospora mirabilis in its life cycle (Jorde 1933). Eastern distribution. New records. Hudson Strait: Negus Bay 2547.3. Codiolum pusillum (Lyngbye) Kjellman Kjellman 1883, p. 318; Jonsson 1903b, p. 341, fig. 3; Taylor 1957, p. 41. Eastern distribution. Literature records. Hudson Strait: False River Bay (Wilce 1959). Family Endosphaeraceae Chlorochytrium dermatocolax Reinke Rosenvinge 1893, p. 964; Bristol 1920, p. 15, as C. inclusum var. dermatocolax; Waern 1952, p. 27; Lund 1959, p. 16. Endophytic in Sphacelaria arctica, Dictyo- siphon foeniculaceus, Polysiphonia arctica, P. urceolata, and Rhodomela lycopodioides. Occasional. Eastern distribution. Literature records. Hudson Strait: Forbes Sound (Wilce 1959). New records. Foxe Channel: Stanley Harbour 74-255A-21. Hudson Bay: Rankin Inlet 74-253A-12. James Bay: Charlton Island CANA 4208. Southwestern distribution. New records. Simpson Strait: Eta Island 8697. Queen Maud Gulf: Anderson Bay 8463, Foggy Bay 8776. Dease Strait: Starvation Cove 7264. Dolphin and Union Strait: Bernard Harbour 6839. Amundsen Gulf: Sachs Harbour 4642. Northwestern distribution. New records. Barrow Strait: Allison Inlet 9360. Chlorochytrium inclusum Kjellman Kjellman 1883, p. 320, pl. 31, figs. 8-17; Rosenvinge 1893, p. 963; 1898, p. 119; Jonsson 1903b, p. 337; Taylor 1957, p. 42; Lund 1959, p. 15; Scagel 1966, p. 103, pl. 9, fig. A. Endophytic, usually in large numbers, in such fleshy red algae occurring as Neodilsea integra, Turnerella pennyi, and Phyllophora truncata. Less frequent hosts were Phyco- drys rubens, Halosaccion ramentaceum and, in. one instance, Callophyllis cristata. Frequent. JOnsson (1966) found this alga to be associated with Spongomorpha lanosa (= S. aeruginosa) in a single life cycle. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Craig Harbour (Lund 1933), Harbour Fjord (Rosenvinge 1926). New records. Hall Basin: Discovery Harbour 9673. Kane Basin: Copes Bay 9707, northern Pim Island 9585, 9603. Jones Sound: Cape Skogn 9217, near Cape Newman Smith 9243, Boat Point 9772. Prince Regent Inlet: Creswell Bay 8868. Bellot Strait: Fox Islands 8827. Gulf of Boothia: Victoria Harbour 8775, Netsiksiuvik Inlet 8737. Davis Strait: Frobisher Bay CANA 16959. Repulse Bay: Talun Bay 74-255B-3. 17 Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a, CANA 4034). New records. Simpson Strait: Eta Island 9026. Queen Maud Gulf: Royal Geographical Society Islands 8596, Enterprise Point 7890, Anderson Bay 8772, Foggy Bay 8067, near Minto Islands 7987. Dease Strait: Qikirtaarjuk Islands 6980, Wellington Bay 62-7300-2. Dolphin and Union Strait: Cockburn Point 8567. Amundsen Gulf: Sachs Harbour 3360, Gillet Bay 6872, Police Point 4335, 6647. Northwestern distribution. New records. Penny Strait: near Russell Island 9745. Wellington Channel: Porden Point 9536. Barrow Strait: Assistance Bay 62-4001-2, Allison Inlet 9367. McDougall Sound: Brooman Point 9256, Freemans Cove 9309. Austin Channel: Hooker Bay 9347. Byam Channel: near Robertson Point DH15-4. Viscount Melville Sound: near Little Point DH2S9-17. Wilkens Strait, south of: Brock Island 3156.2. Beaufort 3074.2. Sea: Cape Prince Alfred Chlorochytrium schmitzii Rosenvinge Rosenvinge 1893, p. 964, fig. 56; 1898, p. 119, fig. 25; Jonsson 1903b, p. 338, fig. 1; Taylor 1957, p. 43; Lund 1959, p. 15. Endophytic in red and brown algal crusts. Occasional. Eastern distribution. Literature records. Hudson Strait: Forbes Sound and False River Bay (Wilce 1959). New records. Hall Basin: Discovery Harbour 9673. Kane Basin: northern Pim Island 9605. Bellot Strait: near Brand Island 74-261A-6. Southwestern distribution. New records. Victoria Strait: Victory Point 8949. Queen Maud Gulf: Anderson Bay 8282. Dease Strait: near Duncan Island 7788. Dolphin and Union Strait: Bernard Harbour 6845. 18 Amundsen Gulf: Booth Island 6596. Northwestern distribution. Literature records. Crozier Channel: Manson Point (Lee 1966). Gomontia polyrhiza (Lagerheim) Bornet and Flahault Rosenvinge 1893, p. 907; 1898, p. 101; Taylor 1957, p. 59, pl. 1, figs. 13-14, pl. 7, fig. 4; Lund 1959, p. 17; Scagel 1966, p. 108, pl. 10, figs. A-E. On bivalve shells at depths between 3 and 20 m. Rare. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Harbour Fjord and Cape Vera (Rosenvinge 1926). Fram Sound: Norfolk Inlet (Rosenvinge 1926). Hudson Strait: Forbes Sound (Wilce 1959). Southwestern distribution. New records. Queen Maud Gulf: Royal Geographical Society Islands 8600. Dease Strait: Qikirtaarjuk Islands 6976. Northwestern distribution. New records. Austin Channel: Hooker Bay 9337. Hecla and Griper Bay: Cape Fisher 3096. Family Phyllosiphonaceae Ostreobium quekettii Bornet and Flahault Rosenvinge 1893, p. 906; 1898, p. 101; Taylor 1957, p. 95, pl. 2, fig. 3; Lund 1959, p. 36. On shells of bivalves and barnacles at a depth of 15 m at Harbour Fjord. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Harbour Fjord (Rosenvinge 1926). Order Prasiolales Family Prasiolaceae Prasiola johanseni Collins Collins 1927a, p. 7. Southwestern distribution. Literature records. Dolphin and Union Strait: Bernard Harbour (Collins 1927a, CANA 4083 Type). Rosenvingiella polyrhiza (Rosenvinge) Silva Rosenvinge 1893, p. 937, figs. 45-46; 1898, p. 116; Waern 1952, p. 47, figs. 20a-e, 21, as Gayella polyrhiza. Intertidal on bedrock formation. Growing densely in association with other filament- Ous green algae, such as Urospora mirabilis, Rhizoclonium implexum, Ulothrix flacca, and U. pseudoflacca. Rare. Both filamentous (Schizogonium stage) and multiseriate, cyl- indrical growth forms were present. Eastern distribution. New records. Hudson Strait: Westbourne Bay 2536, Negus Bay 2547.17. Order Ulotrichales Family Ulotrichaceae Ulothrix flacca (Dillwyn) Thuret Rosenvinge 1893, p. 935, fig. 44; 1898, p. 115; Jonsson 1903b, p. 358; Taylor 1957, p. 45, pl. 1, fig. 9; Lund 1959, p. 18; Scagel 1966, p. 27, pl. 16, figs. C-H. On intertidal rocks at Pangnirtung and Hudson Strait, on intertidal Capsosiphon ful- vescens at Anderson Bay. Also at depths of 2-10 m in Hudson Strait, lvugivik Harbour, and at Qikirtaarjuk Island on Chaetomorpha melagonium and Laminaria haptera. Rare. Eastern distribution. Literature records. Jones Sound: ‘‘Borgo”’ (Rosenvinge 1926). Cardigan Strait: Devil Island (Rosenvinge 1926). Davis Strait: Cumberland Sound (Farlow) 1879, 1886), Pangnirtung (Wheldon 1947, also as _ Ulothrix speciosa, probably). Hudson Strait: Forbes Sound (Wheldon 1947, also as U. speciosa, probably), Westbourne Bay, Negus Bay, Wake- ham Bay, and Sugluk Inlet (Wheldon 1947). New records. Hudson Strait: Negus Bay 2595.7, Wake- ham Bay 2670.2. Hudson Bay: Ivugivik Harbour 2594.4. Southwestern distribution. New records. Queen Maud Gulf: Anderson Bay 8257. Dease Strait: Qikirtaarjuk Islands 7776. Ulothrix laetevirens (Hooker) Collins Taylor 1959, p. 46; Scagel 1966, p. 29, pl. 16, figs K-M. On intertidal rocks. Eastern distribution. Literature records. Lancaster Sound: (Wheldon 1947). Dundas’ Harbour Ulothrix pseudoflacca Wille Rosenvinge 1893, p. 936, as U. implexa; Jonsson 1903b, p. 357; Waern 1952, p. 29; Taylor 1957, p. 46, as U. implexa; Lund 1959, p. 19. At times intertidal on rocks and other algae (Blidingia minima, Capsosiphon fulve- scens, Pilayella littoralis, Stictyosiphon tor- tilis) at scattered localities throughout its range of distribution. More commonly at the 0-30 m depth on rocks, hydroids, and a wide variety of other algae. Frequent. Eastern distribution. Literature records. Lancaster Sound: Dundas’ Harbour (Wheldon 1947, as Ulothrix implexa). New records. Hall Basin: Discovery Harbour 9666. Kane Basin: northern Pim Island 9563. Jones Sound: Boat Point 9769. Prince Regent Inlet: Creswell Bay 8872. Bellot Strait: Fox Islands 8878. Eclipse Sound: near Pond Inlet 2707. Hudson Strait: Westbourne Bay 2484, Wakeham Bay 2640.4. Hudson Bay: Ivugivik Harbour 2594.6. Southwestern distribution. New records. Rasmussen 74-262D. Queen Maud Gulf: Enterprise Point 7910, Anderson Bay 8222, Foggy Bay 8054. Dease Strait: near Duncan Island 7205. Elu Inlet: unnamed island 8023. Melville Sound: Hurd Islands 8366. Prince of Wales Strait: Princess Royal Islands 9489. Amundsen Gulf: Sachs Harbour 3354.4, Pearce Point 4434, Gillet Bay 6787, Police Point 4397, 6663. Beaufort Sea: near Tuktoyaktuk 3286. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Lincoln Sea: Cape Hecla 9686. Basin: Peterson’ Bay x0 Wellington Channel: John Brown Point 9162, Snowblind Bay 9745. McDougall Sound: Brooman Point 9264. Wilkins Strait, south of: Brock Island 3181. Crozier Channel: Mould Bay 3082. Ulothrix subflaccida Wille Jonsson 1903b, p. 357; Waern 1952, p. 30; Lund 1959, p. 20. Intertidal on Blidingia minima at Cape Jane Franklin, Anderson Bay, and Anchor Island. At other localities at depths of 2-10 m on Chaetomorpha melagonium and Rhode- mela lycopodioides. Occasional. Eastern distribution. New records. Hudson Strait: Wakeham Bay 2626.1. Southwestern distribution. New records. Victoria Strait: Cape Jane Franklin 8657. Queen Maud Gulf: Anderson Bay 8257. Dease Strait: Qikirtaarjuk Islands 7146. Coronation Gulf: Anchor Island 6972. Dolphin and Union Strait: Bernard Har- bour 6862. Amundsen Gulf: Police Point 6662. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). Order Ulvales Family Capsosiphonaceae Capsosiphon fulvescens (C. Agardh) Setchell and Gardner Jonsson 1903b, p. 343, as Enteromorpha aureola; Waern 1952, p. 39; Taylor 1957, p. 69; Bliding 1963, p. 15, figs. 2-4. The single population seen grew on inter- tidal pebbles that were submerged at the time in about 30 cm of water. Rivulets of freshwater flowed into the very small (about 40 cm2) area of growth. It would appear that with a sufficient flow of freshwater the growth area would have been continually in water. Rare. Southwestern distribution. New records. Queen Maud Gulf: Anderson Bay 8255. Family Percursariaceae Percursaria percursa (C. Agardh) Rosenvinge Kjellman 1883, p. 302, as Diplonema per- cursum; Rosenvinge 1893, p. 963; Waern 20 1952, p. 39;. Taylor.1957,..p..61,..pl.. baie Lund 1959, p. 22; Bliding 1963, p. 20, figs. 5-6; Scagel 1966, p. 63, pl. 17, fig. D. Intertidal on rocks at Westbourne Bay. Also intertidal at Anderson Bay growing with Capsosiphon fulvescens on pebbles contin- uously immersed in water. Rare. Eastern distribution. Literature records. Hudson Strait: False River Bay (Wilce 1959). New records. Hudson Strait: Westbourne Bay 2527. Southwestern distribution. New records. Queen Maud Gulf: Anderson Bay 8258. Family Monostromataceae Blidingia marginata (J. Agardh) P. Dangeard subsp. marginata Kjellman 1883, p. 291, as Enteromorpha micrococca f. typica; Rosenvinge 1893, p. 957, fig. 54, as E. intestinalis f. micrococca; Bliding 1963, p. 32, figs. 12-13. On intertidal rocks. Rare. Eastern distribution. Literature records. Hudson Strait: Resolution Island (Taylor 1957, as Enteromorpha marginata), False River Bay (Wilce 1959, as E. marginata). New records. Hudson Strait: Sugluk Inlet 2606.2 Blidingia marginata subsp. subsala (Kjell- man) Bliding Kjellman 1883, p. 292, pl. 31, figs. 1-3, as Enteromorpha micrococca f. subsala, in part; Bliding 1963, p. 37, figs. 14-15. On intertidal rocks. Rare. Eastern distribution. New records. Hudson Bay: Eskimo Point 74-250A-5. Blidingia minima var. minima(Nageli) Kylin Kjellman 1883, p. 291, as Enteromorpha minima; Rosenvinge 1893, p. 959, as E. intes- tinalis var. minima; Waern 1952, p. 39; Bliding 1963, p. 23, fig. 7. On intertidal bedrock. Rare. Eastern distribution. New records. Hudson Strait: Westbourne Bay 2528. Blidingia minima var. ramifera Bliding Kjellman 1883, p. 291, as Enteromorpha micrococca f. subsala, in part; Bliding 1963, p. 27, figs. 8-9. In warmer environments, on cobbles and pebbles from the intertidal region down to depths somewhere between 5 and 20 m in near freshwater (e.g., Kugmallit Bay was 1.0 0/00) to marine conditions. In colder re- gions, it was the only intertidal growth (sometimes with epiphytic U/othrix species) in habitats uniquely arctic. In Victoria Strait and Wellington Channel, Blidingia occurred as extensive floating mats in brackish pools that were apparently above sea level. The seaward wall of the pools were pebble and cobble ridges formed by ice-push (see Lee 1973). The collection from near Alert, geo- graphically in the very high arctic, was made in a ‘‘melt channel on sea ice surface’. Occa- sional. Eastern distribution. Literature records. Kane Basin: Alexandra Fjord (Rosen- vinge 1926, as Enteromorpha intesti- nalis; Simmons 1278 in Herb. Univ. Copenhagen). Jones Sound: Harbour Fjord, Muskox Fjord, Goose.Fjord, and West Fjord (Rosenvinge 1926, as E. intestinalis; Simmons 2122, 2208, and 25178 in Herb. Univ. Copenhagen). Lancaster Sound: Dundas’ Harbour (Wheldon 1947, as E. minima and E. micrococca). Hudson Strait: Westbourne Bay (Whel- don 1947, as E. micrococca). New records. Eclipse Sound: near Pond Inlet 2770. Gulf of Boothia: Netsiksiuvik Inlet 8774. Hudson Bay: Churchill Coleman 171.3 Southwestern distribution. Literature records. Dolphin and Union Strait: Bernard Har- bour and Stapyiton Bay (Collins 1927a, as E. micrococca, CANA 4046 and 4056). New records. Victoria Strait: near Cape Jane Franklin 8650, Franklin Point 8648. Queen Maud Gulf: Anderson Bay 8250. Coronation Gulf: Anchor Island 6904. Amundsen Gulf: De Salis Bay 4577, Cape Kellett CANA 9202, Pearce Point 4498. Kugmallit Bay: near Tuktoyaktuk Har- bour 3285. Northwestern distribution. New records. Lincoln Sea: near Alert Harington 212. Wellington Channel: John Brown Point 9767. Kornmannia leptoderma (Kjellman) Bliding Kjellman 1883, p. 299, as Monostroma lep- todermum; Rosenvinge 1893, p. 944, fig. 49, as M. leptodermum; 1898, p. 117, as M. lep- todermum; Taylor 1957, p. 71, as M. lepto- dermum; Lund 1959, p. 21, as M. leptoder- mum; Bliding 1968, p. 611, figs. 44-46. Eastern distribution. Literature records. Hudson Strait: Port Harvey and Forbes Sound (Wilce 1959). Monostroma arcticum Wittrock Kjellman 1883, p. 299; Rosenvinge 1893, p. 949, fig. 51, as M. grevillei var. arctica; 1898, p. 117 as M. grevillei var. arctica; Lund 1959, p. 22, as M. grevillei f. arctica; Jaasund 1965, p. 20; Scagel 1966, p. 35, pl. 18, fig. F, pl. 19, fig. B; Bliding 1968, p. 606, figs. 42-43. On rocks at the 7-8 m depth. Rare. Eastern distribution. Literature records. Jones Sound: ‘Jammer Bay” or Bay of Woe (Rosenvinge 1926, as Mono- stroma grevillei). New records. Kane Basin: northern Pim Island 9568. Family Ulvaceae Enteromorpha clathrata (Roth) Greville Kjellman 1883, p. 287; Jonsson 1903b, p. 348; Waern 1952, p. 37, fig. 17a; Taylor 1957,) ps 63; ph, 35) figy:4s).Lumd’ 1959, .p:. 24; Bliding 1963, p. 107, figs. 64-69; Scagel 1966, p. 46, pl. 22, figs. E, F, pl. 23, figs. A-B. Eastern distribution. Literature records. Robeson Channel: (Dickie 1878). Kane Basin: Hayes Fjord (Dickie 1878). Davis Strait: Cumberland Sound (Dickie 1878). Cape Sheridan Enteromorpha compressa (Linnaeus) Gre- ville Kjellman 1883, p. 289, in part; Rosenvinge 1893, p. 958, as E. intestinalis var. com- pressa; 1898, p. 117, as E. intestinalis var. compressa; Jonsson 1903b, p. 346, as E. intestinalis var. compressa; Waern 1952, p. 35, fig. 14b; Taylor 1957, p. 64, pl. 3, fig. 3; Lund 1959, p. 23; Bliding 1963, p. 132, figs. zn 82-84; Scagel 1966, p. 47, pl. 23, figs. C-F. On intertidal rocks, in gregarious popula- tions at the Hudson Strait sites. All of the northwestern literature records were based on drift material. Rare. Eastern distribution. Literature records. Smith Sound: 78-82° N (Ashmead 1864). Bellot Strait: Port Kennedy (Dickie 1861, as questionable). Davis Strait: Cumberland Sound (Dickie 1867). Hudson Strait: Forbes Sound (Wilce 1959). Hudson Bay: Hudson Bay (Bell and Mac- Farlane 1933). New records. Hudson Strait: Negus Bay 2543, Sugluk Inlet 2606. 7. Hudson Bay: Great Whale River Savile 697. Northwestern distribution. Literature records. Wellington Channel: Baring Bay (Dickie 1852). Barrow Strait: Beechey Island and As- sistance Bay (Dickie 1852). Enteromorpha crinita (Roth) J. Agardh Bliding 1963, p. 119, figs. 73-78, as E. ramu- losa; Scagel 1966, p. 48, pl. 25, figs. A-E. Eastern distribution. Literature records. Adams Sound: Arctic Bay (Wheldon 1947, as Enteromorpha ramulosa). Hudson Strait: Forbes Sound and Negus Bay (Wheldon 1947, as E. ramulosa). James Bay: James Bay (Setchell and Collins 1908). Enteromorpha flexuosa subsp. paradoxa (Dillwyn) Bliding Taylor 1957, p. 63, as E. plumosa; Bliding 1963, p. 79, figs. 42-45. Intertidal at Ekwan River and subtidal at the 5-6 m depth at Charlton Island. Rare. Eastern distribution. Literature records. Hudson Strait: Forbes Sound and False River Bay (Wilce 1959, as Enteromor- pha erecta and E. plumosa, respec- tively). James Bay: Charlton Island (Howe 1927, as E. plumosa, CANA 4235). New records. Hudson Bay: Fort Churchill Crum 7617. James Bay: Ekwan River CANA 9007. Enteromorpha_ groenlandica (J. Setchell and Gardner Rosenvinge 1893, p. 954, fig. 53, as Mono- stroma groenlandicum; 1898, p. 117; Taylor 1957, p. 69; Lund 1959, p. 24. Eastern distribution. Literature records. Hudson Bay: Hudson Bay (Taylor 1957). Agardh) Enteromorpha intestinalis (Linnaeus) Link Kjellman 1883, p. 287; Rosenvinge 1893, p. 957, as E. intestinalis var. genuina; Jonsson 1903b, p. 344, as E. intestinalis var. genuina; Waern 1952, p. 32, fig. 14a; Taylor 1957, p. 66, pl. 3, fig. 7, pl. 4, figs. 4-5; Lund 1959, p. 22; Bliding 1963, p. 139, figs. 87-88; Scagel 1966, p. 49, pl. 26, figs. A-Q, pl. 27, figs. A-E, pl. 28, figs. C-D. On intertidal boulders at Ekwan River. Rare. Eastern distribution. Literature records. * Baffin Bay: Cape Bowen (Dickie 1853). Davis Strait: Cumberland Sound (Dickie 1867, Bell and MacFarlane 1938, Wheldon 1947). Hudson Strait: Forbes Sound and False River Bay (Wilce 1959). Hudson Bay: Chesterfield Inlet (Whel- don 1947), Churchill (Bell and Mac- Farlane 1938). James Bay: James Bay (Setchell and Collins 1908, Bell and MacFarlane 1938). New records. James Bay: Ekwan River CANA 9003. Enteromorpha linza (Linnaeus) J. Agardh Taylor 1957, p. 68, pl. 3, fig. 8; Bliding 1963, p. 127, figs. 79-81; Scagel 1966, p. 52, pl. 24, figs. A-F. Eastern distribution. Literature records. Eclipse Sound: Pond Inlet (Bell and Mac- Farlane 1938). Enteromorpha prolifera (O. F. Miller) J. Agardh Kjellman 1883, p. 289, as E. compressa f. prolifera; Rosenvinge 1893, p. 960, in part; Jonsson 1903b, p. 347, as E. intestinalis f. prolifera; Waern 1952, p. 35, fig. 16g-h; Taylor 1957, p. 65, pl: 3, fig. 2; Lund 1959, p. aa * The specimens from Jones Sound and Kane Basin that Rosenvinge (1926) referred to as Enteromorpha intes- tinalis are of Blidingia minima var. ramifera. Bliding 1963, p. 45, figs. 19-28a; Scagel 1966, p. 54, pl. 28, figs. E-G, in part. On intertidal boulders and free-floating at Ekwan River, and on pebbles within the 5 and 20 m depth in De Salis Bay. Rare. The Fox Islands and Ekwan River specimens are simi- lar to ‘Typus |’, those from De Salis Bay most closely resemble “Typus Ill’, according to Bliding’s (1963) circumscription of E. prolif- era subsp. prolifera. Eastern distribution. Literature records. Lancaster Sound: Dundas' Harbour (Wheldon 1947). Davis Strait: Pangnirtung (Wheldon 1947). Hudson Bay: Southampton Island (Bell and MacFarlane 1938). James Bay: Charlton Island (Howe 1927, CANA 4236; Bell and MacFarlane 1938). New records. Bellot Strait: Fox Islands 8836. James Bay: Ekwan River CANA 9005. Southwestern distribution. New records. , Amundsen Gulf: De Salis Bay 4570. Northwestern distribution. Literature records. Crozier Channel: Mould Bay (Lee 1966). Ulva lactuca Linnaeus Kjellman 1883, p. 293, also as U. crassa; Rosenvinge 1893, p. 939; 1898, p. 116; Taylor 1957, p. 74, pl. 4, fig. 6, in part; Scagel 1966, p. 60, pl. 31, figs. I-K; Bliding 1968, p. 540, figs. 1-5. At Cape Prince Alfred, at depths of 5-10 m loose-lying on the mud substrate. At Ches- terfield Inlet, the specimens were collected as shore-drift. Rare. Eastern distibution. Literature records. Smith Sound: 78-82° N (Ashmead 1864, as Ulva latissima). Davis Strait: Cumberland Sound (Dickie 1867, as U. latissima). Hudson Strait: Westbourne Bay (Bell and MacFarlane 1938). James Bay: James Bay (Setchell and Collins 1908). New records. Hudson Bay: Chesterfield Inlet Savile and Watts 838. Northwestern distribution. Literature records. Lincoln Sea: Mushroom Point (Dickie 1878, as U. latissima). Queens Channel: Queens Channel (Harvey 1858). New records. Beaufort Sea: Cape Prince Alfred 3077. Ulva rigida C. Agardh Taylor 1957, p. 74, as U. lactuca var. rigida; Scagel 1966, p. 61, pl. 30, figs. A-C, pl. 31, figs. A-H; Bliding 1968, p. 546, figs. 6-10. At Gillet Bay, on cobbles at the 3-5 m depth. Rare. Eastern distribution. Literature records. Hudson Strait: Port Harvey and Forbes Sound (Wilce 1959, as Ulva lactuca var. rigida). Hudson Bay: Hudson Bay (Bell and MacFarlane 1933, as U. lactuca var. rigida. Southwestern distribution. New records. Amundsen Gulf: Gillet Bay 6747. Ulvaria obscura var. Bliding Kjellman 1883, p. 299, as Monostroma fus- cum and M. blyttii; Rosenvinge 1893, p. 940, fig. 47, as M. fuscum; 1898, p. 116, as M. fus- cum; Taylor 1957, p. 70, as M. fuscum f. blyt- tii; Lund 1959, p. 21, as M. fuscum; Scagel 1966, p. 36, pl. 19, figs. C-E, pl. 20, figs. A-B, pl. 21, fig. A, as M. fuscum; Bliding 1968, p. 574, figs. 27-30. At depths of 2-18 m on rocks. Occasional. Eastern distribution. Literature records. Smith Sound: Pim Island (Rosenvinge 1926, as Monostroma fuscum). Jones Sound: Craig Harbour (Lund 1933, as M. fuscum). Davis Strait: Pangnirtung 1947, as M. fuscum). Hudson Strait: Ungava Bay (Farlow 1886, as M. blyttii); Forbes Sound, False River Bay, and Koksoak River (Wilce 1959, as M. fuscum var. blyttii). New records. Kane Basin: northern Pim Island 9584, 9613. Fram Sound: Rodberg Bay 9784. Bellot Strait: Fox Islands 8828, near Brands Island 74-261-9. Gulf of Boothia: Netsiksiuvik Inlet 8746. Eclipse Sound: near Pond Inlet 2678. Southwestern distribution. New records. blyttii (Areschoug) (Wheldon 23 Dolphin and Union Strait: Cockburn Point 8543. Amundsen Gulf: Police Point 6644. Northwestern distribution. New records. Penny Strait: near Russell Island 9746. Queens Channel: near Cape Becher 9760. McDougall Sound: Templeton Bay 9774. Ulvaria oxysperma (Kiutzing) Bliding Taylor 1957, p. 72, pl. 4, figs. 1-3, as Mono- stroma oxyspermum; Scagel 1966, p. 39, pl. 20, fig. C, pl. 21, fig. B, as M. oxyspermum, Bliding 1968, p. 585, figs. 31-36. “Washed ashore or in the intertidal zone’. Eastern distribution. New records. Hudson Bay: Churchill Crum 7669. Order Chaetophorales Family Chaetophoraceae Acrochaeta repens Pringsheim Waern 1952, p. 58; Taylor 1957, p.52; South 1974, p. 907, fig. 2. At the 2-9 m depth endophytic in the upper part of thalli of Chorda filum and C. tomentosa. Rare. Southwestern distribution. New records. Simpson Strait: Eta Island 9076. Melville Sound: Kuururjuak Point 8385, Hurd Islands 8322. Bathurst Inlet: Cape Croker Buchan Bay 8535. 8486, Arthrochaete penetrans Rosenvinge Rosenvinge 1898, p. 111, fig. 24; 1910, p. 127, fig. 9, also as A. phaeophila; Lund 1959, p. 26. Within the 2 and 20 m depth on various other algae: Chaetomorpha melagonium, Stictyosiphon tortilis, Desmarestia aculeata, Punctaria glacialis, Omphalophyllum ulvaceum, Fucus’ distichus, Neodilsea integra, Phyllophora truncata, Phycodrys rubens, and Polysiphonia arctica. Frequent. Eastern distribution. New records. Adams Sound: Arctic Bay 2776. Prince Regent Inlet: Creswell Bay 8880. Eclipse Sound: near Pond Inlet 2688. Hudson Strait: Wakeham Bay 2640.3. Fox Channel: Stanley Harbour 74-255A-26. Hudson Bay: Munn Bay 74-254-8, Rankin Inlet 74-253A-4. 24 Southern distribution. New records. Queen Maud Gulf: Enterprise Point 7930, Anderson Bay 8442, Foggy Bay 8081, near Minto Islands 7979. Elu Inlet: unnamed island 8049. Dolphin and Union Strait: Harbour 6859. Amundsen Gulf: De Salis Bay 4560, Gillet Bay 6873. Northwestern distribution. New records. Barrow Strait: Cunningham Inlet 9764, Allison Inlet 9369. McDougall Sound: Templeton Bay 9778, Brooman Point 9263. Austin Channel: Hooker Bay 9339. Wilkens Strait, south of: Brock Island 3177.2 Beaufort 3073.3. Bernard Sea: Cape Prince Alfred Bolbocoleon piliferum Pringsheim Kjellman 1883, p. 316; Huber 1892, p. 308, pl. 13, figs. 8-12; Rosenvinge 1893, p. 934; Waern 1952, p. 59; Taylor 1957, p. 52; Lund 1959, p. 25; South 1974, p. 908, fig. 3. Endophytic in various brown algae at the 3-20 m depth, except at Westbourne Bay where it was intertidal (on Stictyosiphon tortilis). In the southwestern region the most common host was Stictyosiphon tortilis, fol- lowed by Dictyosiphon foeniculaceus, Punc- taria glacialis, Chordaria_ flagelliformis, Sphacelaria arctica, Chorda filum, and C. tomentosa. Occasional. Eastern distribution. New records. Hudson Strait: Westbourne Bay 2530.2. Hudson Bay: Rankin Inlet 74-252A-9. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8984. Simpson Strait: Eta Island 8698, 9030. Queen Maud Gulf: Royal Geographical Society Islands 8675, Enterprise Point 7932, Anderson Bay 8190, 8474, Foggy Bay 8099, near Minto Islands 8008. Dease Strait: Starvation Cove 7270, Qikirtaarjuk Islands 7740, near Duncan Island 7787. Elu Inlet: unnamed island 8052. Melville Sound: Kuururjuak Point 8386, Hurd Islands 8367. Bathurst Inlet: Cape Croker Buchan Bay 8547. 8489 Coronation Gulf: Anchor Island 6929. Dolphin and Union Strait: Bernard Har- bour 6867. Amundsen Gulf: De Salis Bay 4554, Gillet Bay 6790, Police Point 4254, Booth Island 6572. Chaetobolus gibbus Rosenvinge Rosenvinge 1893, p. 928, fig. 41; 1898, p. 110; Lund 1959, p. 27. Epiphytic on a variety of algae at depths of 2-15 m. The most common host was Sora- pion kjellmanii; others were Hildenbrandia prototypus, Pseudolithoderma extensum, Punctaria glacialis, Sphacelaria arctica, Desmotrichum undulatum, Chaetomorpha melagonium, and Cladophora. Occasional. Known only from the Canadian Arctic, Green- land, and perhaps, according to Lund (1959), one locality in Denmark, this alga is polystro- matic and when unhindered by surrounding host cells has a definite hemispherical habit. It is at least morphologically distinct from the unevenly spreading monostromatic discs of Ochlochaete. However, Waern (1952) refers to O. gibbus, as he considers the dif- ference in form to be insufficient for main- taining Chaetobolus. In my opinion, the marked difference in growth habit and prob- able contrasting mode of development are adequate distinctions at present for recog- nizing the two genera. Southwestern distribution. New records. Simpson Strait: Eta Island 9034. Queen Maud Gulf: Enterprise Point 7974, Anderson Bay 8236, 8454, Foggy Bay 8137, near Minto Islands 7993. Dease Strait: near Duncan Island 7275. Elu Inlet: unnamed island 8044. Melville Sound: Hurd Islands 8375. Bathurst Inlet: Cape Croker 8498, Buchan Bay 8524. Coronation Gulf: Anchor Island 6942. Amundsen Gulf: Pearce Point 4576. Ectochaete leptochaete (Huber) Wille Huber 1893, p. 319, pl. 15, figs. 1-9, as Endoderma leptochaete; Waern 1952, p. 55. Within the 1 and 25 m depth usually on Chaetomorpha melagonium. Other hosts were Hildenbrandia_ prototypus, Polysi- phonia arctica, and Rhodomela_ lycopo- dioides. Occasional in the southwest. Eastern distribution. New records. Prince Regent Inlet: Creswell Bay 8882. Gulf of Boothia: Netsiksiuvik Inlet 8747. Southwestern distribution. New records. Queen Maud Gulf: Enterprise Point 7907, Anderson Bay 8225, 8466, Foggy Bay 8110, near Minto Islands 8004. Dease Strait: Starvation Cove 7287, Qikirtaarjuk Islands 7149. Elu Inlet: unnamed island 8040. Dolphin and Union Strait: Bernard Har- bour 6877. Amundsen Gulf: De Salis Bay 4550, Sachs Harbour 3362. Ectochaete wittrockii (Wille) Kylin Huber 1892, p. 326, as Endoderma wit- trockii; Rosenvinge 1893, p. 934, as E. wittrockii; Taylor 1957, p. 54, as Entocladia wittrockii; South 1974, p. 910, fig. 4. Epiphytic or endophytic in cell walls of Chaetomorpha melagonium, Fucus disti- chus, Rhodymenia palmata, and Rhodomela lycopodioides at depths of 1-15 m. Southwestern distribution. New records. Simpson Strait: Eta Island 8677. Rasmussen Basin: Peterson 74-262B-9. Dease Strait: near Duncan Island 7792. Elu Inlet: unnamed island 8472. Bay Entocladia viridis Reinke Waern 1952, p. 56; Taylor 1957, p. 54, pl. 2, figs. 1-2; Scagel 1966, p. 30, pl. 17, fig. C; South 1974, p. 913, fig. 7. At the 2-35 m depth endophytic in various other algae, most commonly Chaetomorpha melagonium and _ Phyllophora _ truncata. Others included Punctaria glacialis, Neodil- sea integra, Turnerella pennyi, and Polysi- phonia arctica. Frequent. Eastern distribution. New records. Kane Basin: Copes Bay 9700, northern Pim Island 9609. Jones Sound: Boat Point 9777. Prince Regent Inlet: Creswell Bay 8887. Gulf of Boothia: Victoria Harbour 8797. Davis Strait: Frobisher Bay CANA 16960. Hudson Bay: Eskimo Point 74-250-15. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8974. Rasmussen’ Basin: Peterson 74-262-2. Simpson Strait: Eta Island 8997. Queen Maud Gulf: Royal Geographical Bay 25 Society Islands 8672, Enterprise Point 7922, Anderson Bay 8173, 8418 Foggy Bay 8063, near Minto Islands 7986. Dease Strait: Qikirtaarjuk Islands 7099, Wellington Bay 62-7305-1. Coronation Gulf: Anchor Island 6976. Dolphin and Union Strait: Bernard Har- bour 6857. Amundsen Gulf: Sachs Harbour 3339.2. Pearce Point 4466, Gillet Bay 6870, Police Point 6775. Northwestern distribution. Literature records. Crozier Channel: Mould Bay (Lee 1966). New records. Queens Channel: Milne Island 9703. Barrow Strait: Allison Inlet 9363. McDougall Sound: Templeton Bay 9107, Brooman Point 9252, Freemans Cove 9311. Austin Channel: Hooker Bay 9340. Byam Channel: near Robertson Point DH7-5, DH22-4. Viscount Melville Sound: near Little Point DH2S9-10. Wilkins Strait, south of: Brock Island 3156.4. Kellett Strait: near Pedder Point 3088.4. Crozier Channel: Manson Point 3736. Epicladia flustrae Reinke Rosenvinge 1898, p. 115; Waern 1952, p. 58; Taylor 1957, p. 55, as Entocladia flus- trae; Lund 1959, p. 25; South 1974, p. 914, fig. 8. On hydroids (Eudendrium, Obelia, and Abietinaria), and bryozoans (Eucrata). In the intertidal zone at Rankin Inlet, at the 3-20 m depth elsewhere. Occasional. Eastern distribution. New records. Bellot Strait: Fox Islands 8844. Hudson Strait: Negus Bay 2572. Hudson Bay: Rankin Inlet 74-253A-27. Southwestern distribution. New records. Dease Strait: Qikirtaarjuk Islands 7153. Coronation Gulf: Anchor Island 6992. Amundsen Gulf: Prince Albert Sound 9469, De Salis Bay 4576, Sachs Harbour 3343, Gillet Bay 6777. Northwestern distribution. New records. Viscount Melville Sound: near Little Point DH2S7-7. Pringsheimiella scutata Marche- wianka (Reinke) 26 Rosenvinge 1893, p. 924, as Pringsheimia scutata; Waern 1952, p. 62; Taylor 1957, p. 57; Lund 1959, p. 28; South 1974, p. 916, fig. 11. The Anchor Island specimens occurred on Polysiphonia arctica from an unrecorded depth. Rare. Eastern distribution. Literature records. Hudson Strait: Ungava Bay (Wilce 1959). Southwestern distribution. New records. Coronation Gulf: Anchor Island 6978. Pseudendoclonium submarinum Wville Waern 1952, p. 49; Taylor 1957, p. 55, also as Protoderma marinum; Lund 1959, p. 26; South 1974, p. 918, fig. 12. Intertidal (Netsiksiuvik Inlet, Peel Inlet, Elu Inlet) and at the 2-20 m depth. When inter- tidal usually with Calothrix scopulorum, when subtidal on rocks, stipes of Laminaria, and on molluscan shells. Occasional. Eastern distribution. New records. Hall Basin: Discovery Harbour 9674. Gulf of Boothia: Netsiksiuvik Inlet 8773. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8964. Queen Maud Gulf: Royal Geographical Society Islands 8603. Dease Strait: near Duncan Island 7789. Elu Inlet: unnamed island 8024. Northwestern distribution. Literature records. _ Crozier Channel: Mould Bay (Lee 1966). New records. Nanson Sound: Cape St. Andrew 9545. Wellington Channel: Emery Bay 9728. Austin Channel: Hooker Bay 9336. Byam Channel: near Robertson Point DH15-11, DH22-6, near Kay Point DH5-1. Viscount Melville Sound: near Little Point DH2S2-2. Wilkins Strait, south of: Brock Island 3172.2. M’Clure Strait: Cape Mecham 3750. Pseudopringsheimia confluens (Rosenvinge) Wille Rosenvinge 1893, p. 924, fig. 39, as U/vella confluens; 1898, p. 109, as U. confluens; Lund 1959, p. 29; South 1974, p. 919, fig. 13A. On the stipes and blades of Laminaria groenlandica and L. solidungula at depths between 6 and 20 m. Rare. Northwestern distribution. New records. Penny Strait: near Russell Island 9734. Queens Channel: near Cape Becher 9749. McDougall Sound: Freemans Cove 9300. Austin Channel: Hooker Bay 9335. Pseudopringsheimia fucicola (Rosenvinge) Wille Rosenvinge 1893, p. 926, fig. 40, as U/vella fucicola; 1898, p. 109, as U. fucicola; Waern 1952, p. 62; Lund 1959, p. 29; South 1974, p. 920, fig. 13B. Epiphytic on Fucus distichus in the inter- tidal zone (northern Pim Island) and at the 1-3 m depth. Rare. Eastern distribution. New records. Kane Basin: Copes Bay 9697, northern Pim Island 9560. Northwestern distribution. New records. Barrow Strait: Cunningham Inlet 9765. Family Chroolepidaceae Pilinia endophytica Collins Collins 1908, p. 156; Taylor 1957, p. 50. At the 2-9 m depth in the crustaceous thalli of Ra/fsia clavata, Sorapion kjellmanii, Lithoderma_ fasticens, and Pseudolitho- derma extensum. Occasional. Eastern distribution. New records. Bellot Strait: 74-261A-5. Southwestern distribution. New records. Victoria Strait: Victory Point 8954. Queen Maud Gulf: Enterprise Point 7975, Anderson Bay 8214, 8453, near Minto Islands 7994. Dease Strait: Qikirtaarjuk Islands 6979, near Duncan Island 7274. Melville Sound: Hurd Islands 8378. Amundsen Gulf: Prince Albert Sound 9461, Pearce Point 4572. near Brands Island Order Acrosiphonales Family Acrosiphonaceae Urospora mirabilis Areschoug Kjellman 1883, p. 315, as U. penicilliformis; Rosenvinge 1893, p. 918, fig. 35; 1898, p. 106; Waern 1952, p. 64, as U. penicilliformis; Taylor 1957, p. 77, as U. penicilliformis; Lund 1959, p. 30, as U. penicilliformis; Scagel 1966, p. 78, pl. 36, figs. A-D. On intertidal rocks, Blidingia minima, and Pilayella littoralis. Rare. Jorde (1933) has linked this alga with Codiolum gregarum in the same life cycle. Eastern distribution. Literature records. Baffin Bay: Clyde (Wheldon 1947, as Hormiscia penicilliformis). Hudson Strait: Koksoak River (Wilce 1959, as Urospora penicilliformis). New records. Hudson Strait: Westbourne Bay 2529, Negus Bay 2547.2. Southwestern distribution. New records. Rasmussen 74-262D. Northwestern distribution. New records. Wellington Channel: 9143. Basin: Peterson’ Bay Snowblind Bay Urospora wormskjoldii (Mertens) Rosenvinge Kjellman 1883, p. 313, as Chaetomorpha wormskioldii; Rosenvinge 1893, p. 920, figs. 36-37; 1898, p. 106; Taylor 1957, p. 77, also as U. collabens; Scagel 1966, p. 81, pl. 35, figs. G-H, pl. 36, figs. E-l. At Ilvugivik Harbour, epiphytic on the stipe of Laminaria longicruris at the 3-10 m depth; near Lands End, on cobbles and pebbles at the 4-6 m depth. Rare. Eastern distribution. Literature records. Fram Sound: Norfolk Inlet (Rosenvinge 1926). New records. Hudson Bay: Ivugivik Harbour 2597.2. Northwestern distribution. New records. Norwegian Bay: near Lands End 9537. Acrosiphonia arcta (Dillwyn) J. Agardh Kjellman 1883, p. 304, as Spongomorpha arcta; Taylor 1957, p. 90, pl. 6, figs. 5-6, as S. arcta; Scagel 1966, pl. 37, figs. A-D, pl. 38, fig. A, as S. arcta. On intertidal and subtidal rocks in Hudson Strait and Hudson Bay. In other areas at depths of 3-25 m on rocks and invertebrates. Occasional. Eastern distribution. Literature records. Smith Sound: 78-82° N (Ashmead 1864, as Cladophora arcta). Davis Strait: Cumberland Sound (Dickie 1867; Farlow 1879, 1886; all as C. arcta). 27 Hudson Strait: Ungava Bay (Farlow 1886, as C. arcta), Forbes Sound (Wheidon 1947, as C. arcta; Wilce 1959, as Spon- gomorpha arcta), Hudson Strait (Bell and MacFarlane 1933, as S. arcta). New records. Kane Basin: northern Pim Island 9564, 9587. Eclipse Sound: near Pond Inlet 2692. Hudson Strait: Westbourne Bay 2520, Negus Bay 2553.7. Foxe Channel: 74-255A-17. Hudson Bay: Churchill Crum 7668. Southwestern distribution. New records. Amundsen Gulf: Thesiger Bay 3379. Northwestern distribution. Literature records. Crozier Channel: Mould Bay (Lee 1966). New records. Penny Strait: near Russell Island 9747, Hungry Bay 62-4300. Queens Channel: Milne Island 9095. Wellington Channel: Snowblind Bay 9157. Stanley Harbour Acrosiphonia hystrix (Stromfelt) Jonsson Rosenvinge 1893, p. 907, as Cladophora arcta var. hystrix; JOnsson 1903b, p. 368, figs. 13-14; Taylor 1959, p. 90, as Spongo- morpha hystrix. Intertidal at Pangnirtung, the southern- most record; elsewhere at depths of 3-18 m. On rocks. Rare. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: “Jammer Bay” or Bay of Woe, and Cape Vera (Rosenvinge 1926). Fram Sound: Norfolk Inlet (Rosenvinge 1926). Cardigan Strait: Devil Island (Rosen- vinge 1926). Davis Strait: Pangnirtung (Wheldon 1947, as Cladophora hystrix). New records. Fram Sound: Rodberg Bay 9787. Bellot Strait: Fox Islands 8846. Northwestern distribution. New records. Norwegian Bay: near Lands End 9538. Spongomorpha aeruginosa (Linnaeus) Hoek Kjellman 1883, p. 306, as S. /Janosa; Taylor 28 1957, p. 89, pl. 5, figs. 6-7, as S. lanosa; van den Hoek 1963, p. 225. This is agametophyte stage in a life cycle with Chlorochytrium inclusum according to Jonsson (1966). Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867, as Cladophora lanosa). Hudson Strait: Forbes Sound (Wilce 1959, as Spongomorpha lanosa). Order Cladophorales Family Cladophoraceae Rhizoclonium riparium (Roth) Harvey Kjellman 1883, p. 309, also as R. rigidum; Rosenvinge 1893, p. 915, figs. 32-34; 1898, p. 103; Waern 1952, p. 71; Taylor 1957, p. 80, pl. 1, fig. 3, also as R. kerneri and R. tortuosum; Lund 1959, p. 33; Scagel 1966, pl. 32, figs. A-E, pl. 33, figs. A-B, also as R. implexum. Intertidal, on bedrock at Negus Bay, cob- bles and pebbles elsewhere. At Anderson Bay, a few filaments of RAR. riparium var. riparium and AR. riparium var. polyrhizum (Lyngbye) Rosenvinge occurred in a fresh- water inundated green algal community dominated by Capsosiphon fulvescens. The Westbourne Bay specimens were of var. riparium; those of Negus Bay, var. implexum (Dillwyn) Rosenvinge. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867), Pangnirtung (Wheldon 1947). Hudson Strait: Forbes Sound (Wheldon 1947, Wilce 1959), Koksoak River (Wilce 1959). New records. Hudson Strait: Westbourne Bay 2528.7, Negus Bay 2595.2. Hudson Bay: Churchill Coleman 177.2. Southwestern distribution. New records. Queen Maud Gulf: Anderson Bay 8260. Chaetomorpha linum (O. F. Miller) Kiitzing Kjellman 1883, p. 313; Waern 1952, p. 69, fig. 30; Taylor 1959, p. 78, pl. 1, figs. 1-2, 10-12, also as C. aerea. Subtidal, attached to worm casings and loose-lying. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). Chaetomorpha melagonium (Weber and Mohr) Kitzing Kjellman 1883, p. 311, also as C. tortuosa*; Rosenvinge 1893, p. 917, also as C. tortuosa; 1898, p. 104, also as C. tortuosa; Waern 1952, p. 66, fig. 28; Taylor 1957, p. 80; Lund 1959, p. 31. Subtidal to the 25 m depth attached to rocks or loose-lying. Also intertidal in Hudson Strait and Hudson Bay. Usually pres- ent as loose-lying, dense populations on the mud substrates of the colder northwest region. Frequent. Eastern distribution. Literature records. Hall Basin: Discovery Harbour (Dickie 1878). Smith Sound: Fram Haven and Pim Island (Rosenvinge 1926). Jones Sound: Craig Harbour (Lund 1933), Harbour Fjord, Goose Fjord, and Cape Vera (Rosenvinge 1926). Hell Gate: ‘““Excrement Bay” or Cross Bay (Rosenvinge 1926). Baffin Bay: Bethune Inlet (Dickie 1871, as Conferva melagonium), Cape Bowen (Dickie 1853, as C. melago- nium). . Lancaster Sound: Dundas Harbour (Bell and MacFarlane 1938). Bellot Strait: Port Kennedy (Dickie 1861, as C. melagonium). Eclipse Sound: Pond Inlet (Bell and Mac- Farlane 1938). Davis Strait: Cumberland Sound (Dickie 1867, also as Chaetomorpha _tor- tuosa). Hudson Strait: Forbes Sound and False River Bay (Wilce 1959), Westbourne Bay (Wheldon 1947, as C. tortuosa), Lake Harbour and Wakeham Bay (Bell and MacFarlane 1938), Hudson Strait (Bell and MacFarlane 1933). New records. Kane Basin: northern Pim Island 9586, 9610. Jones Sound: Cape Skogn 9224, near Cape Newman Smith 9237. Prince Regent Inlet: Creswell Bay 8878. Gulf of Boothia: Netsiksiuvik Inlet 8739. Eclipse Sound: near Pond Inlet 2675. Davis Strait: Frobisher Bay CANA 16966. “Chaetomorpha tortuosa (Dillwyn) Kleen, not to be confused with C. tortuosa Kitzing, which Bgrgesen (1925) considered to be a species of ‘‘warmer seas”’ and reduced it to synonymy under C. capillaris (Kutzing) Borgesen. Hudson Strait: Westbourne Bay 2442.1, Negus Bay 2566. Repulse Bay: Talun Bay 74-256-7. Hudson Bay: Munn Bay /74-255-12, Eskimo Point 74-250-34. Southwestern distribution. Literature records. Dolphin and Union Strait: Austin Bay and Bernard Harbour (Collins 1927a, CANA 4045). New records. St. Roch Basin: Spence Bay 74-259-3. Rasmussen’ Basin: Peterson’ Bay 74-262-6. Simpson Strait: Eta Island 8626, 9022, M’Clintock Bay 74-264-1. Queen Maud Gulf: Royal Geographical Society Islands 8608, Enterprise Point 7918, Anderson Bay 8186, 8465, Foggy Bay 8134, near Minto Islands 7999. Dease Strait: Starvation Cove 7280, Qikirtaarjuk Islands 71742, near Duncan Island 7797. Elu Inlet: unnamed island 8037. Melville Sound: Hurd Islands 8358. Bathurst Inlet: Cape Croker 8504. Coronation Gulf: Anchor Island 6956. Dolphin and Union Strait: Bernard Har- bour 6864, Cockburn Point 8573. Amundsen Gulf: De Salis Bay 4548, Sachs Harbour 3367, Pearce Point 4480, Gillet Bay 6795, Police Point 4311. Northwestern distribution. Literature records. Barrow Strait: Assistance Bay (Dickie 1852, as C. melagonium). Crozier Channel: Manson Point (Lee 1966). New records. Queens Channel: Milne Island 9700. Barrow Strait: Assistance Bay 9505, Allison Inlet 9380. McDougall Sound: Templeton Bay 9705, Brooman Point 9250, Freemans Cove 9312. Byam Channel: near Richardson Point DH13-7, near Robertson Point DH7-10. Hecla and Griper Bay: Cape Fisher 3700. Kellett Strait: near Pedder Point 3088. Crozier Channel: Manson Point 3735. Beaufort Sea: Cape Prince Alfred 3067.5. Cladophora sericea (Hudson) Kutzing Kjellman 1883, p. 308, as C. glaucescens and C. gracilis; Rosenvinge 1893, p. 910, as 29 C. gracilis; 1898, p. 103; Taylor 1957, p. 84, as C. flexuosa, C. glaucescens, C. gracilis, and C. rudolphiana. Scagel 1966, p. 88, pl. 43, fig. D, pl. 44, figs. B-C, pl. 45, figs. A-C, pl. 46, fig. A, as C. glau- cescens and C. gracilis. Subtidal at Anchor Island. Eastern distribution. Literature records. Hudson Strait: Port Burwell, Koksoak River, and Fort Chimo (Wilce 1959, as Cladophora glaucescens and C. ru- dolphiana), Ungava Bay (Farlow 1886, as C. glaucescens and C. gracilis). Southwestern distribution. New records. Coronation Gulf: Anchor Island 6977. Cladophora sp. At depths of 2-15 m on rocks or loose- lying. At times epiphytic on Sphacelaria and Fucus. Occasional. Some specimens may be referred to as Cladophora pachyderma (Kjell- man) Brand, but the majority could not be reliably assigned to any described species. Eastern distribution. New records. Eclipse Sound: near Pond Inlet 2694. Hudson Strait: Westbourne Bay 2470, Wakeham Bay 2637. Southwestern distribution. New records. Queen Maud Gulf: Enterprise Point 7902, Anderson Bay 8284, Foggy Bay 8150. Dease Strait: Starvation Cove 7282, near Duncan Island 7195. Melville Sound: Hurd Islands 8377. Bathurst Inlet: Cape Croker 8479, Buchan Bay 8542. Dolphin and Union Strait: Cockburn Point 8570. Amundsen Gulf: De Salis Bay 4569, Sachs Harbour 3342.1, 4645, Duck Hawk Bluff 4627, Police Point 6685. Northwestern distribution. New records. Penny Strait: Hungry Bay 62-4303. Barrow Strait: Allison Inlet 9375. McDougall Sound: Brooman Point 9267, Freemans Cove 9307. Crozier Channel: Manson Point 3733. Beaufort Sea: Cape Prince Alfred 3342.7. DIVISION PHAEOPHYTA Class Phaeophyceae Order Ectocarpales Family Ectocarpaceae Pilayella littoralis (Linnaeus) Kjellman Kjellman 1883, p. 281, pl. 27, also as P. varia; Rosenvinge 1883, p. 881, as Ecto- carpus littoralis; Waern 1952, p. 111, as P. rupincola; Taylor 1957, p. 102, pl. 9, figs. 1-3; Lund 1959, p. 37; West 1967, p. 150, figs. 1-7. Intertidal (Davis Strait, Hudson Strait, Hud- son Bay, James Bay, and Police Point) and to a depth of 15 m. Growing on rocks, ascidi- ans, and other algae: Chaetomorpha melago- nium, Sphacelaria arctica, S. plumosa, Punc- taria glacialis, Stictyosiphon tortilis, Des- marestia aculeata, Laminaria (stipe and hap- tera), Fucus distichus, Neodilsea integra, and Rhodymenia palmata. Frequent. Eastern distribution. Literature records. Smith Sound: Fram Haven (Rosenvinge 1926). Jones Sound: Craig Harbour (Lund 1933). Fram Sound: Norfolk Inlet (Rosenvinge 1926). Cardigan Strait: Devil Island (Rosen- vinge 1926). Baffin Bay: Bethune Inlet (Dickie 1871, as Ectocarpus littoralis?). Lancaster Sound: Dundas (Wheldon 1947). Davis Strait: Cumberland Sound (Dickie 1867, as E. littoralis; Farlow 1879, as E. farlowii and E. firmus; 1886, as E. littoralis), Pangnirtung (Wheldon 1947). Hudson Strait: Ungava Bay (Farlow 1886, as E. littoralis; Wilce 1959), Forbes Sound (Wheldon 1947), Westbourne Bay and Wakeham Bay (Wheldon 1947), Hudson Strait (Bell and Mac- Farlane 1933). Hudson Bay: Chesterfield Inlet (Whel- don 1947), between Otaska Harbour and Black Whale Harbour (Howe 1927, CANA 4175), Hudson Bay (Bell and MacFarlane 1933). James Bay: James Bay (Setchell and Collins 1908), Grey Goose Island, Old Factory Bay, and Charlton Island (Howe 1927, CANA 4176, 4174 and 4177). New records. Harbour Admiralty Inlet: Arctic Bay 2747. Prince Regent Inlet: Creswell Bay 8899. Bellot Strait: near Brands_ Island 74-261A-2. Eclipse Sound: near Pond Inlet 2693. Hudson Strait: Westbourne Bay 2436, Negus Bay 2544, Wakeham Bay 2674, Sugluk 2677.2. Foxe Channel: 74-255A-7. Repulse Bay: Talun Bay 74-256-5. Hudson Bay: Ivugivik 2597.7, Whale River Savile 690. James Bay: Ekwan River CANA 8770. Southwestern distribution. Literature records. Dolphin and Union Strait: Austin Bay (Collins 1927a). New records. St. Roch Basin: Peel Inlet 8967. Simpson Strait: Eta Island 8662, 9007. Queen Maud Gulf: Royal Geographical Society Islands 8626, Enterprise Point 7934, Anderson Bay 8179, 8469, Foggy Bay 8740, near Minto Islands 8021. Dease Strait: Starvation Cove 7247, Qikirtaarjuk Islands 6986, near Duncan Island 7767. Elu Inlet: unnamed island 8050. Melville Sound: Kuururjuak Point 8392, Hurd Islands 8373. Bathurst Inlet: Cape Croker Buchan Bay 8532. Coronation Gulf: Anchor Island 6922. Dolphin and Union Strait: Bernard Har- bour 6848, Cockburn Point 8577. Amundsen Gulf: De Salis Bay 4587, Sachs Harbour 3337, Pearce Point 4477, Gillet Bay 6796, Police Point 4392, 6686, Booth Island 6607. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Queens Channel: Milne Island 9700. Wellington Channel: Snowblind Bay 9760. Barrow Strait: Radstock Bay 9379, Cunningham Inlet 9766, Allison Inlet 9376. McDougall Sound: Brooman Point 9258, Freemans Cove 9373. Byam Channel: near Robertson Point DH7-13. Wilkins Strait, south of: Brock Island S101.7. Stanley Harbour Great 8505, Hecla and Griper Bay: Cape Fisher 3107.4. Crozier Channel: Manson Point 3112.1. Beaufort Sea: Cape Prince Alfred 3070. Ectocarpus fasciculatus Harvey Kjellman 1883, p. 279; Taylor 1957, p. 107; Jaasund 1965, p. 33, figs. 7-8. Subtidal at Port Burwell. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Farlow 1879, as E. landsburgii). Hudson Strait: Forbes Sound (Wilce 1959). Ectocarpus siliculosus (Dillwyn) Lyngbye Kjellman 1883, p. 277, as E. confervoides; Rosenvinge 1893, p. 882, figs. 21-22, also as E. confervoides and E. penicillatus; 1898, p. 76, also as E. confervoides and E. penicil- latus; Waern 1952, p. 113, figs. 50-51, as E. confervoides; Taylor 1957, p. 105, pl. 8, figs. 1-5, also as E. confervoides, E. dasycarpus, and E. penicillatus; Lund 1959, p. 40, as E. confervoides. At the 2-9 m depth on Sphacelaria arctica and Fucus distichus. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Farrow 1879, as Ectocarpus hiemalis). Hudson Strait: Forbes Sound, False River Bay, and Koksoak River (Wilce 1959, also as E. confervoides). Hudson Bay: Richmond Gulf, between Otaska Harbour and Black Whale Harbour, and Long Island Sound (Howe 1927, CANA 4228, 4227 and 4251). James Bay: Grey Goose Island and Charlton Island (Howe 1927, CANA 4242 and 4241). New records. Adams Sound: Arctic Bay 2737. Southwestern distribution. New records. Amundsen Gulf: Booth Island 6588. Giffordia ovata (Kjellman) Kylin Kjellman 1883, p. 279, as Ectocarpus ova- tus; Rosenvinge 1893, p. 888, fig. 24, as E. ovatus and E. holmii; 1898, p. 77, fig. 16, as E. ovatus; Taylor 1957, p. 110; Lund 1959, p. 43; Cardinal 1964, p. 49, fig. 26; Jaasund 1965, p. 40, fig. 10a. From a depth of 15 m to shallower waters 31 attached to rocks, ascidians, limpets, Chae- tomorpha melagonium, Desmarestia acule- ata (stipe), Neodilsea integra, Turnerella pennyi, and Rhodomela_ lycopodioides. Occasional. Eastern distribution. Literature records. Hudson Strait: Forbes Sound (Wilce 1959). New records. Hall Basin: Discovery Harbour 9665. Hudson Strait: Negus Bay 2508. Southwestern distribution. New records. Amundsen Gulf: Sachs Harbour 3367, Police Point 4334, Booth Island 6679. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Penny Strait: near Russell Island 9737. McDougall Sound: Freemans Cove 9374. Byam Channel: near Robertson Point DH22-12. Wilkins Strait, south of: Brock Island 3156:3. Beaufort Sea: Cape Prince Alfred 3067.2. Laminariocolax tomentosoides Kylin Rosenvinge 1893, p. 890, fig. 25, as Ectocarpus tomentosoides; Taylor 1957, p. 108, as E. tomentosoides; Lund 1959, p. 51, fig. 7; Cardinal 1964, p. 67, fig. 36. On the stipe of Laminaria plants (L. longi- cruris at Creswell Bay and Fox Islands) at depths within 3 and 12 m. Rare. Eastern distribution. Literature records. Cardigan Strait: Devil Island (Rosen- vinge 1926, as Ectocarpus tomento- soides). New records. Prince Regent Inlet: Creswell Bay 8896. Bellot Strait: Fox Islands 8853. Hudson Strait: Wakeham Bay 2653.2. Hudson Bay: Ivugivik 2593.5. (Farlow) Streblonema_ stilophorae (Crouan = and Crouan) Hamel Rosenvinge 1893, p. 892, fig. 26, as Ecto- carpus stilophorae; Jonsson 1903a, p. 152. Eastern distribution. Literature records. Hudson Strait: Forbes Sound (Wilce 1959). 32 Kolderupia maritima (Kjellman) S. Lund Kjellman 1883, p. 285, as Chaetophora maritima; Rosenvinge 1893, p. 932, fig. 43, as Pilinia maritima; Lund 1959, p. 54. On intertidal rocks. Densely occurring in the common mucilagenous matrix of colo- nies of blue-green algae, of which Calothrix scopulorum is the major component. Rare. Eastern distribution. New records. Eclipse Sound: near Pond Inlet 2777. Phaeostroma parasiticum Bgérgesen Bgorgesen 1902, p. 441, fig. 83; Lund 1959, p. 64, fig. Ya. Growing on the blades of Laminaria at the 4-13 m depth. Rare. Eastern distribution. New records. Hudson Strait: Westbourne Bay 2489. Northwestern distribution. Literature records. Crozier Channel: Mould Bay (Lee 1966). New records. Byam Martin Channel: near Robertson Point DH7-9. Byam Channel: Nelson Griffiths Point DH8-3. Beaufort Sea: Cape Prince Alfred 3072.2. Phaeostroma pustulosum Kuckuck Rosenvinge 1898, p. 68, fig. 15; Jonsson 1903a, p. 165, figs. 20-21; Lund 1959, p. 63; Jaasund 1963, p. 5, fig. 3. At depths of 2-15 m growing on a variety of other algae and on hydroids. Of the 17 spe- cies of algal hosts the more frequent ones were, in descending order, Chaetomorpha melagonium, Stictyosiphon tortilis, Rhodo- mela lycopodioides, Dictyosiphon foenicu- laceus, Pilayella littoralis, and Punctaria glacialis. Frequent in the southwest, occa- sional elsewhere. Eastern distribution. New records. Prince Regent Inlet: Creswell Bay 8879. Eclipse Sound: near Pond Inlet 2699.2. Hudson Strait: Wakeham Bay 2640.2. Foxe Channel: Stanley Harbour 74-255A-2. Hudson Bay: Rankin Inlet 74-253A-16, Eskimo Point 74-250-36. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8985. Simpson Strait: Eta Island 8669, 9075, M’Clintock Bay 74-264-3. Queen Maud Gulf: Royal Geographical Society Islands 8607, Enterprise Point 7898, Anderson Bay 8217, 8468, Foggy Bay 8749, near Minto Islands 8010. Dease Strait: Starvation Cove 7242, Qikirtaarjuk Islands 7097, near Duncan Island 7202. Elu Inlet: unnamed island 8053. Melville Sound: MKuururjuak Point 8404, Hurd Islands 8359. Bathurst Inlet: Cape Croker 8495. Dolphin and Union Strait: Bernard Harbour ~ 6860, Cockburn Point 8554. Amundsen Gulf: De Salis Bay 4549, Sachs Harbour 3335, 4643, Duck Hawk Bluff 4620, Gillet Bay 6874, Police Point 4253, Booth Island 6557. Northwestern distribution. New records. Barrow Strait: Allison Inlet 9372. McDougall Sound: Brooman Point 9262. Wilkins Strait, south of: Brock Island Bilt. Kellet Strait: near Pedder Point 3089. Crozier Channe!: Manson Point 3727.17. Beaufort Sea: Cape Prince Alfred 3073.2. Family Ralfsiaceae Symphyocarpus strangulans Rosenvinge Rosenvinge 1893, p. 896, figs. 28-29; 1898, p. 67; Lund 1959, p. 70, fig. 11; Jaasund 1963, p. 6, fig. 4. Epiphytic on Chaetomorpha melagonium, Punctaria glacialis, Neodilsea integra, and Phycodrys rubens at depths of 2-9 m. Rare. Eastern distribution. New records. Hudson Bay: Munn Bay 74-254-9. Southwestern distribution. New records. Queen Maud Gulf: Enterprise Point 7919, Foggy Bay 8733. Dease Strait: Qikirtaarjuk Islands 7773. Amundsen Gulf: Gillet Bay 6875. Ralfsia clavata (Harvey) Crouan and Crouan Rosenvinge 1893, p. 899; Taylor 1957, p. 136; Lund 1959, p. 78, as R. tenuis. On rocks at the 1-9 m depth and also inter- tidal in Hudson Strait. Eastern distribution. Literature records. Hudson Strait: Forbes Sound (Wilce 1959). New records. Bellot Strait: 74-261A-3. Hudson Strait: Wakeham Bay 2670.3, Sugluk Inlet 2603.7. Southwestern distribution. * New records. Amundsen Gulf: Booth Island 6593. near Brands Island Ralfsia fungiformis (Gunner) Setchell and Gardner Kjellman 1883, p. 248, as R. deusta; Rosen- vinge 1893, p. 898, as R. deusta; 1898, p. 93, as R. deusta; Taylor 1957, p. 134. At the 3-10 m depth on rocks and the hap- tera of Laminaria longicruris. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867, as R. deusta). Hudson Strait: Ungava Bay (Farlow 1886, as R. deusta). James Bay: vicinity Halfway Point (Howe 1927, as R. deusta, CANA 4193). New records. Hudson Strait: Westbourne Bay 2570. Hudson Bay: Ivugivik 2590.17. Ralfsia ovata Rosenvinge Rosenvinge 1893, p. 900, fig. 30; 1898, p. 94. On rocks within the 2 and 25 m depth. Rare. Southwestern distribution. New records. Gulf of Boothia: 8749. Northwestern distribution. New records. Wilkins Strait, south of: Brock Island 3155.6: Netsiksiuvik Inlet Ralfsia verrucosa (Areschoug) J. Agardh Kjellman 1883, p. 249; Rosenvinge 1893, p. 899; Taylor 1957, p. 135, pl. 11, figs. 1-2; Jaasund 1965, p. 61. In intertidal pools at Forbes Sound. Eastern distribution. Literature records. Davis Strait: 1947). Hudson Strait: Forbes Sound (Wilce Pangnirtung (Wheldon * The Ra/fsia pusilla specimens (CANA 4042) reported by Collins (1927a) from Austin Bay, Dolphin and Union Strait, is Sorapion kjellmanii. 1959), Westbourne Bay (Wheldon 1947), Hudson Strait (Bell and Mac- Farlane 1933). Sorapion kjellmanii (Wille) Rosenvinge Rosenvinge 1893, p. 902, as Lithoderma kjellmanii; 1898, p. 95; Waern 1949, p. 662, figs. 2a-d; Taylor 1957, p. 138; Lund 1959, p. 79, fig. 14. At the 2-15 m depth on rocks, other algae, and invertebrates (Mytilus, Acmaea, Ser- ripes, etc.). The algal host included Chaeto- morpha melagonium (most common), Punc- taria glacialis, Fucus distichus, Neodilsea integra, and Rhodomela_ lycopodiodes. Frequent. Eastern distribution. Literature records. Jones Sound: Harbour Fjord (Rosen- vinge 1926). Hell Gate: “Excrement Bay” or Cross Bay (Rosenvinge 1926). Hudson Strait: Forbes Sound and False River Bay (Wilce 1959). New records. Kane Basin: northern Pim Island 9587. Jones Sound: near Cape Newman Smith 9239. Adams Sound: Arctic Bay 2748. Prince Regent Inlet: Creswell Bay 8887. Eclipse Sound: near Pond Inlet 2677. Hudson Bay: Eskimo Point 74-250-6. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8976. Simpson Strait: Eta Island 8688, 9009, M’Clintock Bay 74-264-2. Victoria Strait: Victory Point 8957. Queen Maud Gulf: Royal Geographical Society Islands 8677, Enterprise Point 7913, Anderson Bay 8197, 8467, 74-269-7, Foggy Bay 8724, near Minto Islands 7992. Dease Strait: Starvation Cove 7240, Qik- irtaarjuk Islands 6987, near Duncan Island 7278. Elu Inlet: unnamed island 8034. Melville Sound: Kuururjuak Point 8388, Hurd Islands 8342. Bathurst Inlet: Cape Croker Buchan Bay 8523. Coronation Gulf: Anchor Island 6957. Dolphin and Union Strait: Austin Bay CANA 4042, Bernard Harbour 6854. Amundsen Gulf: De Salis Bay 4557, Sachs Harbour 3363, Gillet Bay 6877, Police Point 6653, Booth Island 6604. 8494, Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Wellington Channel: 9158. Barrow Strait: Radstock Bay 9324, Allison Inlet 9387. McDougall Sound: Templeton Bay 9106, Brooman Point 9257. Byam Channel: near Consett Head DH14. Crozier Channel: Manson Point 3774. Beaufort Sea: Cape Prince Alfred 3067.8. Snowblind Bay Lithoderma fatiscens Areschoug Kjellman 1883, p. 255, pl. 26, figs. 6-7, in part; Rosenvinge 1893, p. 901, in part; Waern 1949, p. 652, figs. 2e-g; Lund 1959, p. 83. On rocks within the 2 and 15 m depth. Occasional. Eastern distribution. New records. Kane Basin: Norman Lockyer Island 9712. Prince Regent Inlet: Creswell Bay 8877. Gulf of Boothia: Victoria Harbour 8780, Netsiksiuvik Inlet 8748. Hudson Strait: Negus Bay 2568. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1926a). New records. St. Roch Basin: Peel Inlet 8982. Simpson Strait: Eta Island 9032. Victoria Strait: Victory Point 8953. Queen Maud Gulf: Anderson Bay 8270. Dease Strait: Starvation Cove 7254. Amundsen Gulf: Pearce Point 4486. Pseudolithoderma extensum (Crouan and Crouan) S. Lund Rosenvinge 1898, p. 97, as Lithoderma fatiscens, in part; Waern 1949, p. 658, figs. 2i-j,as L. extensum; Taylor 1957, p. 137, as L. extensum; Lund 1959, p. 84. On rocks at the 2-10 m depth and also intertidal at Wakeham Bay. Occasional. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926, as Lithoderma extensum). Jones Sound: Goose Fjord, “Jammer Bay” or Bay of Woe, and Cape Vera (Rosenvinge 1926, as L. extensum). Fram Sound: Norfolk Inlet (Rosenvinge 1926, as L. extensum). Hudson Strait: Forbes Sound (Wilce 1959, as L. extensum). New records. Hudson Strait: Westbourne Bay 2479, Negus Bay 2569, Wakeham Bay 2652, 2672.1. Hudson Bay: Ivugivik Harbour 2585.6. Southwestern distribution. New records. Queen Maud Gulf: Foggy Bay 8708. Dease Strait: Qikirtaarjuk Islands 7094. Bathurst Inlet: Cape Croker 8476, Buchan Bay 8525. Amundsen Gulf: Pearce Point 4577, Police Point 6658, Booth Island 6592. Northwestern distribution. New records. Wilkens Strait, south of: Brock Island 15D. Pseudolithoderma rosenvingii (Waern) S. Lund Rosenvinge 1898, p. 97, fig. 22, as Litho- derma fatiscens, in part; Waern 1949, p. 654, figs. 2h, 3, pl. 2, as L. rosenvingii; 1952, p. 146, fig. 66, as L. rosenvingii; Lund 1959, p. 84. At the 2-9 m depth on rocks. Occasional in the southwest. Southwestern distribution. New records. Queen Maud Gulf: 7924. Melville Sound: Hurd Island 8377. Dolphin and Union Strait: Cockburn Point 8564. Amundsen Gulf: Booth Island 6594. Northwestern distribution. Literature records. Crozier Channel: Manson Point (Lee 1966, as Lithoderma rosenvingii). Enterprise Point Pseudolithoderma subextensum (Waern) S. Lund Waern 1949, p. 659, fig. 4, pl. 3, as Litho- derma subextensum; 1952, p. 148, fig. 67, as L. subextensum. On rocks at depths of 2-12 m and also intertidal in Hudson Strait. Occasional. Eastern distribution. New records. Kane Basin: Copes Bay 9696. Jones Sound: Cape Skogn 9278. Hudson Strait: Westbourne Bay 2490, Negus Bay 2567, Wakeham Bay 2670.1. Southwestern distribution. New records. Queen Maud Gulf: near Minto Islands 7995. Coronation Gulf: Anchor Island 6902. Dolphin and Union Strait: Cockburn Point 8565. Amundsen Gulf: Booth Island 6600. Northwestern distribution. New records. Wilkens Strait, south of: Brock Island 3154.4. Order Sphacelariales Family Sphacelariaceae Sphacelaria arctica Harvey Kjellman 1883, p. 274; Rosenvinge 1893, p. 904, as S. racemosa var. arctica; 1898, p. 100, as S. racemosa var. arctica; Waern 1952, p. 100, figs. 39b, 41, 43-44, 47b; Taylor 1957, p. 120, as S. racemosa var. arctica; Lund 1959, p. 95. At depths of 2-15 m on rocks, Chaetomor- pha melagonium, and Fucus distichus. Also intertidal in Hudson Strait and Hudson Bay, and possibly forming loose-lying popula- tions on mud substrates. Frequent. Eastern distribution. Literature records. Smith Sound: Pim Island (Rosenvinge 1926, as S. racemosa var. arctica). Baffin Bay: Bethune Bay (Dickie 1871). Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879, 1886). Hudson Strait: Ungava Bay (Wilce 1959, as S. racemosa var. arctica). New records. Adams Sound: Arctic Bay 2737.3. Prince Regent Inlet: Creswell Bay 8889. Eclipse Sound: near Pond Inlet 2689. Hudson Strait: Westbourne Bay 2469, Negus Bay 2542.1, Wakeham Bay 2644. Foxe Channel: 74-255A-18. Hudson Bay: Eskimo Point 74-250A-4. Southwestern distribution. New records. Rasmussen 74-262B-4. Simpson Strait: Eta Island 8700. Victoria Strait: Victoria Point 8960. Queen Maud Gulf: Royal Geographical Society Islands 8637, Anderson Bay 8234, 8460, Foggy Bay 8095, near Minto Islands 8075. Stanley Harbour Basin: Peterson’ Bay 35 Dease Strait: Qikirtaarjuk Islands 7103, near Duncan Island 7207. Elu Inlet: unnamed island 8046. Melville Sound: Hurd Islands 8374. Bathurst Inlet: Cape Croker 8483, Buchan Bay 8536. Coronation Gulf: Anchor Island 6928. Dolphin and Union Strait: Bernard Har- bour 6841, Cockburn Point 8569. Prince of Wales Strait: Berkeley Point 9482. Amundsen Gulf: Sachs Harbour 3353, Pearce Point 4484, 44917, Gillet Bay 6755, Police Point 4232, 6680, Booth Island 6677. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Barrow Strait: Radstock Bay 9320, Alli- son Inlet 9359. McDougall Sound: Brooman Point 9257. Viscount Melville Sound: near Little Point DH2S7-13. Hecla and Griper Bay: Cape Fisher 3095. Crozier Channel: Manson Point 3740.7. Sphacelaria cirrosa (Roth) C. Agardh Kjellman 1883, p. 274; Taylor 1957, p. 121, pl. 17, figs. 1-6; Jaasund 1965, p. 70. At a depth of 18 m at Grey Goose Island. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867, as S. pennata). James Bay: Grey Goose Island (Howe 1927). Sphacelaria plumosa Lyngbye Kjellman 1883, p. 273, as Chaetopteris plu- mosa; Rosenvinge 1893, p. 903, as C. plu- mosa; 1898, p. 99, as C. plumosa; Taylor 1957, p. 122, as C. plumosa; Lund 1959, p. 98, as C. plumosa. At depths of 2-30 mon rocks, Ahnfeltia pli- cata, and Laminaria haptera. Also on inter- tidal pebbles at Eskimo Point. Frequent. Eastern distribution. Literature records. Robeson Channel: Floeberg Beach (Dickie 1878, as Chaetopteris plumosa). Smith Sound: Pim Island (Rosenvinge 1926, as C. plumosa). Baffin Bay: Bethune Bay (Dickie 1871). Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879, 1886, all as C. plumosa). Hudson Strait: Hudson Strait (Bell and MacFarlane 1933, as C. plumosa), Forbes Sound (Wilce 1959, as C. plumosa). Hudson Bay: Depot Island (Setchell and Collins 1908, as C. plumosa), between Otaska Harbour and Black Whale © Harbour (Howe 1927, as C. plumosa, CANA 4190). James Bay: James Bay (Setchell and Collins 1908, as C. plumosa), Grey Goose Island (Howe 1927, as C. plu- mosa, CANA 4189). New records. Jones Sound: near Cape Newman Smith 9219, Boat Point 9773. Prince Regent Inlet: Creswell Bay 8877. Hudson Strait: Westbourne Bay 2572, Negus Bay 2556.2. Hudson Bay: Munn Bay /74-255-77, Rankin Inlet 74-253A-15, Eskimo Point 74-250-10, Churchill Crum 7587. James Bay: Swan River CANA 4802. Southwestern distribution. Literature records. Dolphin and Union Strait: Austin Bay, Cockburn Point, and Cape Young (Collins 1927a, as C. plumosa, CANA 4037, 4032 and 4038). New records. St. Roch Basin: Peel Inlet 8990. Simpson Strait: Eta Island 9039. Victoria Strait: Victory Point 8962. Queen Maud Gulf: Enterprise Point 7935, Anderson Bay 8287, 8471, Foggy Bay 87717, near Minto Islands 8011. Dease Strait: Starvation Cove 7273, Qikirtaarjuk Islands 7205. Coronation Gulf: Anchor Island 6975. Dolphin and Union Strait: Cockburn Point 8568. Prince of Wales Strait: Berkeley Point 9487. Amundsen Gulf: De Salis Bay 4547, Thesiger Bay 3372, Sachs Harbour 3364, Pearce Point 4406, Gillet Bay 6756, Police Point 4233, Booth Island 6563. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966, as C. p/umosa). New records. Barrow Strait: Cunningham Inlet 9770, Allison Inlet 9378. Byam Channel: near Robertson Point DH15-12. Kellett Strait: near Pedder Point 3085. Crozier Channel: Manson Point 31777. Beaufort Sea: Cape Prince Alfred 3060. 7. Sphacelaria radicans (Dillwyn) C. Agardh Kjellman 1883, p. 275, as S. olivacea; Waern 1952, p. 96, figs. 38, 39d; Taylor 1957, p. 119; Jaasund 1965, p. 68. At the 18 m depth in Hudson Bay. Eastern distribution. Literature records. Hudson Bay: between Otaska Harbour and Black Whale Harbour (Howe 1927, CANA 4170). Order Tilopteridales Family Tilopteridaceae Haplospora globosa Kjellman Kjellman 1883, p. 211, also as Scapho- spora arctica; Rosenvinge 1898, p. 48, as S. arctica; Taylor 1957, p. 125; Lund 1959, p. 88, figs. 16-17; South 1975, p. 698, figs. 3-4. In the southwest, both loose-lying and attached to rocks at depths between 2 and 20 m. The Hudson Bay material was found “floating” (Howe 1927) and that of Eclipse Sound was on Halosaccion ramentaceum that had drifted to shore. The Eclipse Sound specimens were sporophytes, while those from the southwestern region consisted of sporophytes and gametophytes. Occasional in the southwest, rare in the east. Eastern distribution. Literature records. Hudson Bay: Long Island Sound (Howe 1927, CANA 4226). New records. Eclipse Sound: near Pond Inlet 2676. Southwestern distribution. New records. Simpson Strait: Eta Island 8699. Dease Strait: Qikirtaarjuk Islands 7744. Amundsen Gulf: De Salis Bay 4583, Thesiger Bay 3378, Police Point 4258, Booth Island 6608. Order Chordariales Family Myrionemataceae Dermatocelis laminariae Rosenvinge Rosenvinge 1898, p. 89, fig. 21; Jonsson 1903a, p. 148, fig. 9, as Myrionema lami- nariae; Lund 1959, p. 107, fig. 21. At the 15-18 m depth occurring in dense patches on the upper portion of blades of Laminaria solidungula. Rare. Eastern distribution. New records. Fram Sound: Rodberg Bay 9780. Hecatonema foecundum (Stromfelt) Loiseaux Jonsson 1903a, p. 149, figs. 10-12, as Ascocyclus islandicus; Taylor 1957, p. 132, as Myrionema foecundum; Lund 1959, p. 109, fig. 22, as A. foecundus; Loiseaux 1967, p. 531, tgs: 1-5, pl. t. On Fucus distichus and Chaetomorpha melagonium between the 2 and 8 m depth. Rare. Southwestern distribution. New records. Dease Strait: Qikirtaarjuk Islands 7104. Elu Inlet: unnamed island 8042. Hecatonema maculans (Collins) Sauvageau Taylor 1957, p. 129; Lund 1959, p. 59; Cardi- nal 1964, p. 76, fig. 40. On Sphacelaria plumosa and Fucus distichus between the 2 and 9 m depth. Rare. Southwestern distribution. New records. Queen Maud Gulf: Foggy Bay 8703. Amundsen Gulf: Sachs Harbour 3338. Leptonematella fasciculata (Reinke) Silva Rosenvinge 1893, p. 879, as Leptonema fasciculatum; 1898, p. 75, as Elachista fas- ciculata; Taylor 1957, p. 143, as L. fascicu- latum; Lund 1959, p. 113, fig. 24, as L. fasci- culatum. Epiphytic on other algae at depths of 3-18 m. On one occasion also growing on limpets. Among the 17 species of algal hosts, the more common ones” were Chaetomorpha melagonium, Sphacelaria plumosa, Stictyosiphon tortilis, Punctaria glacialis, Polysiphonia arctica, and Rhodomela lycopodioides. Occasional in the eastern region, frequent in the southwest. Eastern distribution. New records. Prince Regent Inlet: Creswell Bay 8895. Bellot Strait: Fox Islands 8854. Gulf of Boothia: Victoria Harbour 8763. Hudson Strait: Negus Bay 2579.2. Foxe Channel: Stanley Harbour 74-255A-3. Hudson Bay: Munn Bay 74-254-7, Ivu- givik 2592.3, Eskimo Point 74-250-37. a7 Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8986. Simpson Strait: Eta Island 8670, 9040. Queen Maud Gulf: Enterprise Point 7909, Anderson Bay 8425, Foggy Bay 8117, near Minto Islands 7987. Dease Strait: Starvation Cove 7248, Qikirtaarjuk Islands 7778, near Duncan Island 7204. Elu Inlet: unnamed island 8047. Amundsen Gulf: Prince Albert Sound 9462, Sachs Harbour 3341.3, 4644, Police Point 6630, Booth Island 6678. Microsporangium globosum Reinke Rosenvinge 1898, p. 86, figs. 19-20, as Phy- cocelis globosus; Jonsson 1903a, p. 146, figs. 5-8, as Myrionema globosum; Taylor 1957, p. 131, as M. globosum; Lund 1959, p. 111, fig. 23; Jaasund 1965, p. 60. At Rankin Inlet, intertidal on Spacelaria plumosa. Elsewhere at the 2-8 m depth on Chaetomorpha melagonium, Cladophora, and the stipe of Laminaria longicruris and L. solidungula. Rare. Eastern distribution. New records. Hudson Strait: Westbourne Bay 2527. Hudson Bay: Rankin Inlet 74-253-17. Southwestern distribution. New records. Elu Inlet: unnamed island 8043. Coronation Gulf: Anchor Island 6972. Northwestern distribution. New records. Penny Strait: near Russell Strait 9736. Myrionema aecidioides (Rosenvinge) Sauvageau Rosenvinge 1893, p. 894, fig. 27, as Ecto- carpus aecidioides; 1898, p. 80, as E. aeci- dioides; Taylor 1957, p. 115, as Streblonema aecidioides; Lund 1959, p. 61, as Entonema aecidioides; Jaasund 1965, p. 47, fig. 14, as E. aecidioides. Endophytic in the blades of Laminaria at the 8-15 m depth. Rare. Eastern distribution. Literature records. Hudson Strait: Forbes Sound (Wilce 1959, as Streblonema aecidioides). New records. Hudson Bay: Munn Bay 74-254-2, Rankin Inlet 74-252A-3. Myrionema strangulans Greville Kjellman 1883, p. 255; Taylor 1957, p. 132, pl. 11, figs. 13-14; Jaasund 1965, p. 57, fig. 17; Loiseaux 1967, p. 547, figs. 8-11, pl. 2. At the 18 m depth at Grey Goose Island. Eastern distribution. Literature records. James Bay: Grey Goose Island (Howe 1927, CANA 4222). Family Elachistaceae Elachista fucicola (Velley) Areschoug Kjellman 1883, p. 253, also as E. /ubrica; Rosenvinge 1893, p. 878; 1898, p. 74; Waern 1952, p. 153; Taylor 1957, p. 140, pl. 10, figs. 1-3, also as E. /ubrica; Lund 1959, p. 116; Jaasund 1960, p. 101, figs. 1-4, also as Myri- actula l/ubrica. At the 2-30 m depth epiphytic on various other algae and on one occasion (Qikir- taarjuk Islands) growing on a hydroid. The most common host was Chaetomorpha melagonium, followed by Halosaccion ramentaceum, Rhodomela_ lycopodioides, and Punctaria glacialis. Most of the speci- mens could be referred to E. fucicola f. lubrica (Ruprecht) Rosenvinge. Frequent in the southwest, occasional elsewhere. Eastern distribution. Literature records. Jones Sound: Craig Harbour (Lund 1933). Davis Strait: Cumberland Sound (Dickie 1867). Hudson Bay: Long Island Sound (Howe 1927, CANA 4237, James Bay: James Bay (Setchell and Collins 1908, as E. /ubrica). New records. Jones Sound: Cape Skogn 9200, near Cape Newman Smith 9238, Boat Point 9176. Prince Regent Inlet: Creswell Bay 8883. Bellot Strait: Fox Islands 8876. Gulf of Boothia: Netsiksiuvik Inlet 8740. Hudson Strait: Westbourne Bay 2462.2. Repulse Bay: Talun Bay 74-256-9. Hudson Bay: between Otaska Harbour and Black Whale Harbour CANA 4195. Southwestern distribution. New records. Simpson Strait: Eta Island 8677, 9036. Queen Maud Gulf: Royal Geographical Society Islands 8609, Anderson Bay 8445, Foggy Bay 8732, near Minto Islands 7946. Dease Strait: Qikirtaarjuk Islands 7754. Melville Sound: Kuururjuak Point 8393, Hurd Islands 8368. Coronation Gulf: Anchor Island 6959. Dolphin and Union Strait: Cockburn Point 8587. Amundsen Gulf: Gillet Bay 6799, Police Point 4241, 6684. Northwestern distribution. Literature records. Crozier Channel: 1966). New records. . Wellington Channel: Snowblind Bay 9755. Barrow Strait: Assistance Bay 62-4001-4, 9506. . Hecla and Griper Bay: Cape Fisher 3103. Manson Point (Lee Family Chordariaceae Eudesme virescens (Carmichael) J. Agardh Kjellman 1883, p. 251; Rosenvinge 1898, p. 58, as Castagnea virescens; Taylor 1957, p. 145, pl. 12, fig. 3; Lund 1959, p. 119, fig. 25. On rocks at the 2-6 m depth. Rare. Eastern distribution. Literature records. Hudson Strait: False River Bay and Koksoak River (Wilce 1959). Hudson Bay: Long Island Sound (Howe 1927, as Castagnea virescens, CANA 4192). Southwestern distribution. New records. Elu Inlet: unnamed island 8398. Melville Sound: Hurd Islands 8330. Chordaria flagelliformis (O. F. Miller) C. Agardh Kjellman 1883, p. 249; Rosenvinge 1893, p. 854; 1898, p. 58; Taylor 1957, p. 148, pl. 12, ng: 6, pl. 14, fig. 4; Lund 1959, p. 121, figs. 26-27; Jaasund 1965, p. 67. On rocks, bivalves, and other algae. In Hudson Bay from the low intertidal to a depth of 18 m. Elsewhere from depths of 2 to 12 m. Occasional. Eastern distribution. Literature records. Hall Basin: Discovery Harbour (Dickie 1878). Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879), Pangnirtung (Wheldon 1947). Hudson Strait: Ungava Bay (Farlow 1886, Wilce 1959), Hudson Strait (Bell and MacFarlane 1933). Hudson Bay: between Otaska Harbour and Black Whale Harbour, also Long Island Sound (Howe 1927, CANA 4185 and 4753). James Bay: Old Factory Bay and Charl- ton Island (Howe 1927, CANA 4154), James Bay (Setchell and Collins 1908). New records. Bellot Strait: Fox Islands 8839. Hudson Strait: Westbourne Bay 2468, Negus Bay 2557. Hudson Bay: Eskimo Point 74-250A-17, Churchill Crum 7675. Southwestern distribution. New records. Queen Maud Gulf: near Minto Islands 8012. Melville Sound: Hurd Islands 8365. Bathurst Inlet: Cape Croker 8499. Amundsen Gulf: Gillet Bay 6802, Police Point 4309, 6652. Order Desmarestiales Family Desmarestiaceae Desmarestia aculeata (Linnaeus) Lamouroux Kjellman 1883, p. 261; Rosenvinge 1893, p. 857; 1898, p. 59; Taylor 1957, p. 154, pl. 13, figs. 4-5, pl. 14, fig. 7; Lund 1959, p. 126. Within the 1 and 25 m depth attached to rocks and also loose-lying on mud _ sub- strates. Frequent. Eastern distribution. Literature records. Hall Basin: Discovery Harbour (Dickie 1878). Smith Sound: 78-83°N. (Ashmead 1864), southern Pim Island (Rosenvinge 1926). Jones Sound: Craig Harbour (Lund 1933, Bell and MacFarlane 1938), Harbour Fjord and Goose Fjord (Rosenvinge 1926). Hell Gate: ‘‘Reindeer Bay’? and Lands End (Rosenvinge 1926). Baffin Bay: Bethune Inlet (Dickie 1871). Lancaster Sound: Dundas Harbour (Bell and MacFarlane 1938, Wheldon 1947). Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938). Davis Strait: Exeter Sound (Lund 1933), Cumberland Sound (Dickie 1867). Hudson Strait: Ungava Bay (Farlow 1886, Wheldon 1947, Wilce 1959), Lake Har- bour (Bell and MacFarlane 1938). Hudson Bay: South Bay (Wheldon 1947). James Bay: James Bay (Setchell and Collins 1908). New records. Kane Basin: Norman Lockyer Island 9718, Copes Bay 9702. Jones Sound: Cape Skogn 9204, near Cape Newman Smith 9247. Prince Regent Inlet: Creswell Bay 8869. Gulf of Boothia: Netsiksiuvik Inlet 8747. Davis Strait: Frobisher Bay CANA 16965. Hudson Strait: Westbourne Bay 2444, Wakeham Bay 2620. Foxe Channel: Stanley 74-255A-9. Repulse Bay: Talun Bay 74-255B-10. Hudson Bay: Munn Bay /74-254-12, Rankin Inlet 74-252A-7, Eskimo Point 74-250-21, Churchill Crum 7593. Southwestern distribution. Literature records. Dolphin and Union Strait: Bernard Har- bour and Cockburn Point (Collins 1927A, CANA 4073 and 4075). New records. Simpson Strait: Eta Island 8682. Queen Maud Gulf: Royal Geographical Society Islands 8606, near Minto Islands 7975. Bathurst Inlet: Cape Croker 8490. Amundsen Gulf: Thesiger Bay 3377, Sachs Harbour 3357, Gillet Bay 6778, Police Point 4237, 6657. Northwestern distribution. Literature records. Queens Channel: 76°29’ N. 96°13’ W. (Harvey 1858). Crozier Channel: 1966). New records. Norwegian Bay: near Lands End 9542. Belcher Channel: Cape Ursula 9730. Queens Channel: Milne Island 9086. Wellington Channel: Snowblind Bay 9141. Barrow Strait: near Cape Dungeness 9519, Cunningham Inlet 9772, Allison Inlet 9374. Byam Channel: near Richardson Point DH13-5. Viscount Melville Sound: near Little Point DH2S7-1. Kellet Strait: near Pedder Point 3088.3. Crozier Channel: Manson Point 3778. Beaufort Sea: Cape Prince Alfred 3069. 7. Harbour Manson Point (Lee Desmarestia viridis (O. F. Miller) Lamouroux Kjellman 1883, p. 263, as Dichloria viridis; Rosenvinge 1893, p. 859, 1898, p. 60; Taylor 15,0. 190, pl. 13, tg. 3; Lund .1959, p. 128. On rocks at the 2-18 m depth. Occasional. Eastern distribution. Literature records. Smith Sound: Pim Island (Rosenvinge 1926). Hell Gate: “Excrement Bay” or Cross Bay, and ‘Reindeer Bay” (Rosenvinge 1926). Davis Strait: Pangnirtung (Bell MacFarlane 1938). Hudson Strait: False River Bay and Koksoak River (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933). New records. Robeson Channel: near Cape Rawson 9629. Hall Basin: Distant Cape 9660, Discov- ery Harbour 9675. Kane Basin: Norman Lockyer Island 9719, northern Pim Island 9580. Fram Sound: Rodberg Bay 9797. Gulf of Boothia: Victoria Harbour 8795. Hudson Strait: Westbourne Bay 2577.1, Wakeham Bay 2645.7. Northwestern distribution. Literature records. Crozier Channel: 1966). New records. Belcher Channel: Cape Ursula 9732. Queens Channel: Milne Island 9096. Wellington Channel: Snowblind Bay 9147. Barrow Strait: near Cape Dungeness 9578. McDougall Sound: Templeton Bay 9775. Byam Martin Channel: near Burnett Point DH11S1-2. Byam Channel: DH7-6. Wilkins Strait, south of: Brock Island 3164. and Manson Point (Lee Order Dictyosiphonales Family Striariaceae Isthmoplea Kjellman Kjellman 1883, p. 276; Rosenvinge 1893, p. 881; 1898, p. 75; Jonsson 1903a, p. 162, figs. 18-19; Taylor 1957, p. 156, pl. 9, figs. 4-5; Lund 1959, p. 39. Eastern distribution. Literature records. Hudson Strait: Forbes Sound, False River Bay, and Koksoak River (Wilce 1959). sphaerophora (Carmichael) Stictyosiphon tortilis (Ruprecht) Reinke Kjellman 1883, p. 264, pl. 26, fig. 17, as Phloeospora pumila, P. subarticulata, and P. tortilis; Rosenvinge 1893, p. 868; 1898, p. 70; Waern 1952, p. 155, fig. 70; Taylor 1957, p. 158; Naylor 1958, p. 8, figs. 1A-B, 2B, 2F, 3A-B; Lund 1959, p. 130. At the 4-20 m depth as loose-lying popula- tions or on rocks, Laminaria haptera, and Fucus distichus. Also intertidal at West- bourne Bay and Police Point. Frequent. Eastern distribution. Literature records. Smith Sound:.Pim Island (Rosenvinge 1926). Jones Sound: Craig Harbour (Lund 1933), Fram Fjord and Harbour Fjord (Rosenvinge 1926). Davis Strait: Cumberland Sound (Farlow 1879, 1886, as Phloeospora tortilis). Hudson Strait: Forbes Sound, False River Bay, and Koksoak River (Wilce 1959). Hudson Bay: Long Island Sound (Howe 1927, CANA 4201). James Bay: Grey Goose Island and Chariton Island (Howe 1927, CANA 4183). New records. Jones Sound: Cape Skogn 9226. Prince Regent Inlet: Creswell Bay 8870. Eclipse Sound: near Pond Inlet 2682.4. Hudson Strait: Westbourne Bay 2450, Wakeham Bay 2667. Foxe Channel: Stanley 74-255A-12. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8983. Rasmussen Basin: Peterson 74-262B-18. Simpson Strait: Eta Island 8696, 9028. Victoria Strait: Victory Point 8967. Queen Maud Gulf: Royal Geographical Society Islands 8673, Enterprise Point 7931, Anderson Bay 8189, 8473, Foggy Bay 8098, near Minto Island 8007. Harbour Bay Dease Strait: Starvation Cove 7257, Qikirtaarjuk Islands 7739, near Duncan Island 7276. Elu Inlet: unnamed island 8047. Melville Sound: Kuururjuak Point 8407, Hurd Islands 8354. Bathurst Inlet: Cape Croker Buchan Bay 8540. Coronation Gulf: Anchor Island 6944. 8497, Dolphin and Union Strait: Bernard Har- bour 6833, Cockburn Point 8579. Amundsen Gulf: De Salis Bay 4580, Thesiger Bay 3375, Sachs Harbour 3341.1, Duck Hawk Bluff 4679, Pearce Point 4490, Gillet Bay 6791, Police Point 4390, 6687, Booth Island 6574. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Barrow Strait: Radstock Bay 9378, Alli- son Inlet 9373. McDougall Sound: Templeton Bay 9777, Brooman Point 9267. Byam Channel: near Robertson Point DH7-16, DH15-10. Hecla and Griper Bay: Cape Fisher 3107.3 Kellett Strait: near Pedder Point 3124. Crozier Channel: Manson Point 3739. Beaufort Sea: Cape Prince Alfred 3064.17. Family Punctariaceae Litosiphon filiformis (Reinke) Batters Rosenvinge 1893, p. 869, as Pogotrichum filiforme var. penicilliforme; Jonsson 1903a, p. 162; Taylor 1957, p. 162; Lund 1959, p. 150, fig. 33; Jaasund 1965, p. 85, figs. 24-25. Epiphytic on blades of Laminaria. Eastern distribution. Literature records. Cardigan Strait: Devil Island (Rosen- vinge 1926). Hudson Strait: Port Harvey and Forbes Sound (Wilce 1959). Desmotrichum undulatum (J. Agardh) Reinke Taylor 1957, p. 164, pl. 15, fig. 6, pl. 16, figs. 1-2, also as D. balticum; Jaasund 1957, p. 216; fig/6; 1959) p. 87} fig! 26. At the 2-15 m depth on rocks and other algae. At depths above 8-9 m the most com- mon host was Fucus distichus. Other hosts at that depth and deeper were Chaetomor- pha melagonium, Stictyosiphon tortilis, Rho- dymenia palmata, and Rhodomela lycopo- dioides. Rare in the east, frequent in the southwest. Eastern distribution. Literature records. James Bay: Charlton Island (Howe 1927, as Desmotrichum balticum, CANA 4184). 41 New records. Hudson Bay: Rankin Inlet 74-253A-3. Southwestern distribution. New records. Simpson Strait: Eta Island 8666, 9073. Queen Maud Gulf: Enterprise Point 7912, Foggy Bay 8097, near Minto Islands 8020. Dease Strait: Starvation Cove Qikirtaarjuk Islands 7759, Duncan Island 7277. Melville Sound: Hurd Islands 8372. Coronation Gulf: Anchor Island 6947. Dolphin and Union Strait: Bernard Har- bour 6849, Cockburn Point 8580. Amundsen Gulf: De Salis Bay 4568, Sachs Harbour 4649, Police Point 4257, Booth Island 6579. 7266, near Punctaria glacialis Rosenvinge Rosenvinge 1910, p. 118, figs. 6-7; Lund 1959, p. 135. Within the 3 and 5 m depth on boulders and cobbles, Fucus distichus, and possibly (at Sachs Harbour) as loose-lying popula- tions. Occasional. Eastern distribution. New records. Hall Basin: Discovery Harbour 9667. Hudson Bay: Munn Bay 74-254-6. Southwestern distribution. New records. Rasmussen 74-262-1. Simpson Strait: Eta Island 8676, 9033. Victoria Strait: Victory Point 8959. Queen Maud Gulf: Royal Geographical Society Islands 8627, Anderson Bay 8176, 8441, Foggy Bay 8074, near Minto Islands 7947. Dease Strait: Starvation Cove 7245. Prince of Wales Strait: Princess Royal Islands 9494. Amundsen Gulf: Sachs Harbour 3357, Booth Island 6535. Basin: Peterson Bay Punctaria plantaginea (Roth) Greville Kjellman 1883, p. 260; Rosenvinge 1893, p. 871; 1898, p. 71; Taylor 1957, p. 166, pl. 15, fig. 4, pl. 16, fig. 4; Lund 1959, p. 133, fig. 28. On boulders and cobbles at the 3-9 m depth. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867). Southwestern distribution. 42 New records. Dease Strait: Starvation Cove 7259. Amundsen Gulf: Gillet Bay 6807. Petalonia fascia (O. F. Miller) Kuntze Kjellman 1883, p. 257, as l/lea fascia; Rosenvinge 1893, p. 862, as Phyllitis fascia; Taylor 1957, p. 167, pl. 14, fig. 5, pl. 15, fig. 3. At the 5-18 m depth in James Bay. Eastern distribution. Literature records. Smith Sound: 78-82° N. (Ashmead 1864, as Laminaria fascia). Davis Strait: Cumberland Sound (Dickie 1867, as L. fascia). Hudson Strait: Hudson Strait (Bell and MacFarlane 1933, as /lea_ fascia); Forbes Sound, False River Bay, and Koksoak River (Wilce 1959). Hudson Bay: between Otaska Harbour and Black Whale Harbour, and Long Island Sound (Howe 1927). James Bay: Grey Goose Island, Old Factory Bay, and Charlton Island (Howe 1927, CANA 4279). Northwestern distribution. Literature records. Barrow Strait: Union Bay (Dickie 1852, as L. fascia). Scytosiphon lomentaria (Lyngbye) C. Agardh Kjellman 1883, p. 258; Rosenvinge 1893, p. 863; 1898, p. 62; Taylor 1957, p. 168, pl. 15, fig. 2, pl. 16, fig. 3; Lund 1959, p. 103, fig. 20. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867, as Chorda lomentaria). Hudson Strait: Port Harvey, Forbes Sound, False River Bay, and Koksoak River (Wilce 1959). Asperococcus echinatus (Mertens) Greville Kjellman 1883, p. 247; Taylor 1957, p. 169, pl. 15, fig. 7, pl. 16, figs. 5-6. Intertidal at Pangnirtung and Negus Bay. Eastern distribution. Literature records. Davis Strait: Pangnirtung (Wheldon 1947). Hudson Strait: Negus Bay (Wheldon 1947). Omphalophyllum ulvaceum Rosenvinge Rosenvinge 1893, p. 872, fig. 19, pl. 2, figs. 1-2; 1898, p. 73; Taylor 1957, p. 171; Lund 1959, p. 137, fig. 29. Loose-lying, 5-13 m depth. Occasional. Northwestern distribution. Literature records. Norwegian Bay: near Lands End (Rosen- vinge 1926). New records. Byam Channel: near Robertson Point DH7-12. Wilkins Strait, south of: Brock Island 3167.7. Kellett Strait: near Pedder Point 3097. Crozier Channel: Manson Point 3728. Beaufort Sea: Cape Prince Alfred 3075. 7. Family Dictyosiphonaceae Coilodesme bulligera Stromfelt Rosenvinge 1893, p. 862; 1898, p. 61, fig. 13; JOnsson 1903a, p. 168. Eastern distribution. Literature records. Hudson Strait: Port Harvey (Wilce 1959). Dictyosiphon foeniculaceus Greville Kjellman 1883, p.-268, also as D. hip- puroides and D. hispidus; Rosenvinge 1893, p. 859, also as D. hippuroides and D. his- pidus; 1898, p. 60; Waern 1952, p. 162; Taylor 1957, p. 172, pl. 12, fig. 4, pl. 14, fig. 2; Lund a209, Pp. 152. Attached to rocks and possibly as loose- lying populations within the 2 and 18 m depth. At some localities it also grew on Chordaria flagelliformis, Punctaria glacialis, Stictyosiphon tortilis, and Fucus distichus. Specimens from Starvation Cove and Police Point could be referred to f. flaccidus Ares- choug; those from Fox Islands, f. hispidus Kjellman. Occasional. Eastern distribution. Literature records. Kennedy Channel: Rawlings Bay (Dickie 1878). Smith Sound: Pim Island (Rosenvinge 1926, as f. flaccidus). Jones Sound: Craig Harbour (Lund 1933). Baffin Bay: Bethune Bay (Dickie 1871). Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879). Hudson Strait: Ungava Bay (Farlow 1886), Forbes Sound (Wheldon 1947, Wilce 1959), False River Bay and Koksoak River (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933). (Hudson) dense populations at the Hudson Bay: Hudson Bay (Bell and MacFarlane 1933). James Bay: Grey Goose Island and Charlton Island (Howe 1927, CANA 4243 and 4244). New records. Adams Sound: Arctic Bay 2737.2. Bellot Strait: Fox Islands 8842. Gulf of Boothia: Victoria Harbour 8796. Eclipse Sound: near Pond Inlet 2683. Hudson Strait: Westbourne Bay 2497, Negus Bay 2565, Wakeham Bay 2647. Foxe Channel: Stanley Harbour 74-255A-10. Hudson Bay: Rankin Inlet 74-252A-8. Southwestern distribution. New records. Simpson 74-264-4. Queen Maud Gulf: Anderson Bay 8178, 8426, near Minto Islands 8022. Dease Strait: Starvation Cove 7262. Elu Inlet: unnamed island 8057. Melville Sound: Kuururjuak Point 8395, Hurd Islands 8357. Dolphin and Union Strait: Bernard Har- bour 6866. Amundsen Gulf: Sachs Harbour 4647, Police Point 4279. Strait: M’Clintock Bay Order Laminariales Family Chordaceae Chorda filum (Linnaeus) Lamouroux Kjellman 1883, p. 245, pl. 26, fig. 16; Rosen- vinge 1893, p. 853; Waern 1952, p. 164; Taylor 1957, .p..176,; pl. 14; fig: 3; pl. 15, figs 1; Cond 1959; \p. 155. On rocks and bivalves at depths of 2-9 m. Occasional. Eastern distribution. Literature records. Hudson Strait: 1886). Hudson Bay: Long Island Sound (Howe 1927a, CANA 4186). James Bay: James Bay (Setchell and Gardner 1908). Southwestern distribution. New records. Melville Sound: Kuururjuak Point 8383, Hurd Islands 8326. Bathurst Inlet: Cape Croker Buchan Bay 8534. Coronation Gulf: Anchor Island 7072. Ungava Bay (Farlow 8485, Chorda tomentosa Lyngbye Kjellman 1883, p. 246; Rosenvinge 1893, p. 854; Taylor 1957, p. 175; Jaasund 1957, p. 212, as Halosiphon tomentosa; Lund 1959, D150: On rocks, Fucus, and bivalves. At the 15 m depth at Eta Island, 2-9 m elsewhere. Occa- sional. Eastern distribution. Literature records. Hudson Strait: False River Bay and Koksoak River (Wilce 1959). Hudson Bay: between Otaska Harbour and Black Whale Harbour (Howe 1927, CANA 4158). Southwestern distribution. New records. Simpson Strait: Eta Island 8684, 9074. Dease Strait: Starvation Cove 7279. Melville Sound: Kuururjuak Point 8384, Hurd Islands 8325. Amundsen Gulf: Gillet Bay 6806. Family Laminariaceae Saccorhiza dermatodea (De la Pylaie) J. Agardh Kjellman 1883, p. 223, pl. 24, pl. 25, figs. 1-6, as Phyllaria dermatodea and P. Lorea; Rosenvinge 1893, p. 850; 1898, p. 57; Taylor 1957, pl. 22, fig. 2; Lund 1959, p. 157. Eastern distribution. Literature records. Jones Sound: ‘Jammer Bay” or Bay of Woe (Rosenvinge 1926). Hudson Strait: Port Harvey, Fox Harbour, and Forbes Sound (Wilce 1959). Laminaria agardhii Kjellman Kjellman 1877, p. 18, pl. 1, figs. 2-3; 1883, p. 234; Taylor 1957, p. 179, pl. 15, fig. 2. Attached to rocks at depths of 13 m and shallower. Rare. Eastern distribution. Literature records. Hudson Strait: Hudson Strait (Bell and MacFarlane 1933). Hudson Bay: Hudson Bay (Bell and Mac- Farlane 1933). New records. Foxe Channel: 74-255A-5. Southwestern distribution. New records. Amundsen Gulf: Booth Island 6533. Stanley Harbour Laminaria digitata (Hudson) Lamouroux Kjellman 1883, p. 240; Rosenvinge 1893, p. 841; 1898, p. 51; Taylor 1957, p. 184, pl. 18, fig. 1; Lund 1959, p. 164. On rocks at the 4-8 m depth. Rare. Eastern distribution. Literature records. Hudson Strait: Cape Wolstenholme (Bell and MacFarlane 1938). Hudson Bay: Hudson Bay (Bell and MacFarlane 1933). New records. Hudson Strait: Westbourne Bay 2456. Hudson Bay: Churchill Crum 7658. Laminaria groenlandica Rosenvinge Kjellman 1883, p. 228, as L. cuneifolia; Rosenvinge 1893, p. 847, also as L. cunei- folia; 1898, p. 53; Taylor 1957, p. 179, also as L. cuneifolia; Lund 1959, p. 163; Wilce 1960, p. 203; 1965, p. 247, fig. 1; Druehl 1968, p. 542, figs. 8, 11-14, 23-25, 35-38. At the 3-30 m depth attached to rocks (in- cluding pebbles) and shells. Frequent. Eastern distribution. Literature records. Smith Sound: Pim Island* (Rosenvinge 1926). Jones Sound: Harbour Fjord, Goose Fjord, Walrus Fjord, and ‘Jammer Bay” or Bay of Woe (Rosenvinge 1926). Hudson Strait: Port Harvey (Wilce 1959), Forbes Sound to Koksoak River (Wilce 1959, also as Laminaria cunel- folia). New records. Hall Basin: Discovery Harbour 9664. Kane Basin: Norman Lockyer Island 9717, Copes Bay 9693, northern Pim Island 9567, 9600. Jones Sound: Cape Skogn 9194, near Cape Newman Smith 9228, Boat Point 9165. Fram Sound: Rodberg Bay 9782. Bellot Strait: Fox Islands 8873, near Brands Island 74-261-6. Davis Strait: Frobisher Bay CANA 16972. Hudson Strait: Westbourne Bay 2448, Wakeham Bay 2653. Southwestern distribution. * New records. Victoria Strait: Victory Point 8652. * Rosenvinge based this record on the notation H.G. Simmons had made in his diary as having seen Laminaria saccharina. * Our specimens (CANA 4057, 4058, 4059, 4068) of the Dolphin and Union Strait material cited by Collins (1927a) as Laminaria groenlandica are referable to L. saccharina. Northwestern distribution. Literature records. Crozier Channel: Manson Point (Lee 1966, as L. saccharina var. groen- landica). New records. Norwegian Bay: near Lands End 9539. Penny Strait: near Russel Island 9738. Queens Channel: near Cape Becher 9748. Wellington Channel: Emery Bay 9727, Snowblind Bay 9134. Barrow Strait: near Cape Dungeness 9516, Assistance Bay 9503, Allison Iniet 9356. McDougall Sound: Templeton Bay 9708, Brooman Point 9245, Freemans Cove 9305. Austin Channel: Hooker Bay 9333. Byam Martin Channel: Maori Point 9352. Viscount Melville Sound: near Little Point DH2S2-3, DH2S7-2. Crozier Channel: Manson Point 3723, Mould Bay 3076. M’Clure Strait: Cape Mecham 3753. Laminaria longicruris De la Pylaie Kjellman 1883, p. 232; Rosenvinge 1893, p. 845; 1898, p. 52; Taylor 1957, p. 181, pl. 20, figs. 1-2; Wilce 1965, p. 247, fig. 1. On rocks within the 3 and 14 m depth. Oc- casional. Eastern distribution. Literature records. Smith Sound: 78-82° N. (Ashmead 1864), Pim Island* (Rosenvinge 1926). Davis Strait: Exeter Sound (Lund 1933), Cumberland Sound (Dickie 1867). Hudson Strait: Ungava Bay (Farlow 1886, Wilce 1959). Hudson Bay: Hudson Bay (Bell and MacFarlane 1933). New records. Prince Regent Inlet: Creswell Bay 8894. Bellot Strait: Fox Islands 8850. Davis Strait: Frobisher Bay CANA 16962. Hudson Strait: Westbourne Bay 2443, Negus Bay 2478. Foxe Channel: 74-255A-1. Hudson Bay: Munn Bay 74-254-7, lvugi- vik 2588, Eskimo Point 74-250-42. Stanley Harbour “Specimens were not collected but Simmons (see footnote to Laminaria groenlandica) had noted in his diary the occurrence of the species. According to Rosenvinge (1926), Simmons also mentioned its occurrence in Jones Sound, “near Harbour Fjord, frozen in sea ice”. Laminaria nigripes J. Agardh Kjellman 1883, p. 236, also as L. atrofulva; Rosenvinge 1893, p. 842; Taylor 1957, p. 182; Lund 1959, p. 164. On rocks at the 4-8 m depth. Rare. Eastern distribution. Literature records. * Hudson Strait: Port Harvey and Forbes Sound to Koksoak River (Wilce 1959). New records. Hudson Strait: Westbourne Bay 2504. Laminaria saccharina (Linnaeus) Lamouroux Kjellman 1883, p. 229, pl. 25, fig. 7; Rosen- vinge 1898, p. 53, fig. 12; Taylor 1957, p. 180; Lund 1959, p. 159, fig. 34; Wilce 1965, p. 247, fig. 1; Druehl 1968, p. 544, figs. 15-16, 26, 39. At depths of 3-19 m, attached to rocks (in- cluding pebbles) and shells. Frequent. Eastern distribution. Literature records. Smith Sound: 78-82° N. (Ashmead 1864, also as Laminaria phyllitis). Bellot Strait: Port Kennedy (Dickie 1861). Eclipse Sound: Pond Inlet (Bell and Mac- Farlane 1938, as L. phyllitis; Wheldon 1947). Davis Strait: Cumberland Sound (Dickie 1867), Pangnirtung (Wheldon 1947). Hudson Strait: Forbes Sound (Wheldon 1947, Wilce 1959), False River Bay and Koksoak River (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933, as L. phyllitis). James Bay: Charlton Island (Bell and MacFarlane 1938, as L. phyllitis). New records. Robeson Channel: near Cape Rawson 9625. Hall Basin: Distant Cape 9655. Gulf of Boothia: Victoria Harbour 8787, Netsiksiuvik Inlet 8737, Pelly Bay 74-257-1. Eclipse Sound: near Pond Inlet 2703. Hudson Strait: Westbourne Bay 2447, Wakeham Bay 2633. Repulse Bay: Talun Bay 74-256-7. Hudson Bay: Rankin Inlet 74-2517-1, Eskimo Point 74-250-32. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8977. * Rosenvinge (1926), with only fragments of specimens available, was uncertain of the presence of Laminaria nigripes in Smith Sound, Jones Sound, and Cardigan Strait. 45 Rasmussen’ Basin: Peterson Bay 74-262C-3. Simpson Strait: Eta Island 8994. Victoria Strait: Victory Point 8657. Queen Maud Gulf: Royal Geographical Society Islands 8602, Anderson Bay 8165, 8416, 74-269-1, Foggy Bay 8056. Dease Strait: Starvation Cove 7278. Dolphin and Union Strait: Bernard Har- bour CANA 4068, Cockburn Point 8549, CANA 4058, Cape Young CANA 4057. Amundsen Gulf: Sachs Harbour 3352, Gillet Bay 6734, Police Point 4306, 6643, near Point Stivens 63-008. Northwestern distribution. Literature records. Barrow Strait: Assistance Bay (Dickie 1852). New records. Belcher Channel: Cape Ursula 9727. Queens Channel: Milne Island 9084. Barrow Strait: Cunningham Inlet 9773. Austin Channel: near Langley Point 9348. Byam Channel: near Richardson Point DH13-1, near Robertson Point DH7-7. Viscount Melville Sound: Nelson Grif- fiths Point DH8-1, near Little Point DH2S2-5, DH2S9-17. Kellett Strait: near Pedder Point 3090. Crozier Channel: Manson Point 3742, Mould Bay 3080. Beaufort Sea: Cape Prince Alfred 3072.1. Laminaria solidungula J. Agardh Kjellman 1883, p. 227; Rosenvinge 1893, p. 850; 1898, p. 57; Taylor 1957, p. 182; Lund 1959, p. 158. At the 3-30 m depth on rocks and shells. Frequent. Some of the specimens from Eskimo Point and Cockburn Point had muci- lage ducts only in the blade. Specimens from Foggy Bay and near Point Stivens were with- out mucilage ducts. Eastern distribution. Literature records. Smith Sound: Pim Island* (Rosenvinge 1926). Jones Sound: Goose Fjord and Cape Vera (Rosenvinge 1926). Fram Sound: Norfolk Inlet (Rosenvinge 1926). * As with Laminaria groenlandica and L. longicruris, this record was based solely on the field notes of Simmons. 46 Hell Gate: ‘““Excrement Bay” or Bay of Woe, “Reindeer Cove’, ‘‘Hare Point’, and Lands End (Rosenvinge 1926). Hudson Strait: Forbes Sound to Fort Chimo (Wilce 1959). New records. Robeson Channel: near Cape Rawson ~ 9622. Hall Basin: Distant Cape 9652, Discov- ery Harbour 9663. Kane Basin: Norman Lockyer Island 9714, Copes Bay 9692, northern Pim Island 9578, 9607. Jones Sound: Cape Skogn 9793, near Cape Newman Smith 9227, Boat Point 9164. Fram Sound: Rodberg Bay 9783. Prince Regent Inlet: Creswell Bay 8859. Bellot Strait: Fox Islands 8849, near Brands Island 74-261-5. Gulf of Boothia: Victoria Harbour 8756, Netsiksiuvik Inlet 8743. Hudson Strait: Westbourne Bay 2430, Wakeham Bay 2662. Repulse Bay: Talun Bay 74-256-2. Hudson Bay: Rankin Inlet 74-252A-7, Eskimo Point 74-250-30. Southwestern distribution. New records. Rasmussen 74-262C-1. Simpson Strait: Eta Island 8993. Queen Maud Gulf: Anderson Bay 8164, 8414, Foggy Bay 8058, near Minto Islands 7970. Dease Strait: between Starvation Cove and Long Point 66-1012, Wellington Bay 66-1004. Dolphin and Union Strait: Cockburn Point 8547. Amundsen Gulf: Gillet Bay 6725, Police Point 6633, near Point Stivens 63-009. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966). New records. Nanson Sound: near Butter Porridge Point 9557, 9554. Belcher Channel: Cape Ursula 9724. Penny Strait: near Russel Island 9733, Hungry Bay 62-4304-1. Queens Channel: Milne Island 9087. Wellington Channel: Emery Bay 9725, Snowblind Bay 9759. Barrow Strait: near Cape Dungeness 9513, Allison Inlet 9355. Basin: Peterson Bay McDougall Sound: Templeton Bay 9773, Freemans Cove 9306. Austin Channel: Hooker Bay 9334. Byam Martin Channel: Maori Point 9354. Byam Channel: near Robertson Point DH7-2, DH15-2, near Kay Point DH5-2. Viscount Melville Sound: Nelson Grif- fiths Point DH8-4. Wilkins Strait, south of: Brock Island at7o. Crozier Channel: Manson Point 3722. Agarum cribrosum Bory Kjellman 1883, p..222, as A. turneri; Rosen- vinge 1893, p. 841, as A. turneri; 1898, p. 50, as A. turneri; Taylor 1957, p. 185, pl. 22, fig. 1. On rocks at depths of 5-35 m. Occasional. Eastern distribution. Literature records. Smith Sound: Fram Haven (Rosenvinge 1926, as Agarum turneri). Jones Sound: Harbour Fjord, Goose Fjord, and “Jammer Bay” or Bay of Woe (Rosenvinge 1926, as A. turneri). Hell Gate: ‘Reindeer Bay’? and Lands End (Rosenvinge 1926, as A. turneri). Lancaster Sound: Dundas Harbour (Bell and MacFarlane 1938, Wheldon 1947; both as A. turneri). Bellot Strait: Port Kennedy (Dickie 1861, as A. turneri). Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938, Wheldon 1947; both as A. turneri). Davis Strait: Exeter Sound (Lund 1933, as A. turneri), Cumberland Sound (Dickie 1867, as A. turneri). Hudson Strait: Ungava Bay (Farlow 1886, as A. turneri; Wilce 1959), Cape Wols- tenholme (Bell and MacFarlane 1938, as A. turneri), Hudson Strait (Bell and MacFarlane 1933, as A. turneri). Hudson Bay: Depot Island (Setchell and Collins 1908, as A. turneri), Churchill (Bell and MacFarlane 1938, as A. turneri), Hudson Bay (Bell and Mac- Farlane 1933, as A. turneri. James Bay: James Bay (Setchell and- Collins 1908, as A. turneri). New records. Kane Basin: Copes Bay 9704, northern Pim Island 9595. Jones Sound: Cape Skogn 9195, near Cape Newman Smith 9237. Admiralty Inlet: Arctic Bay 2726. Prince Regent Inlet: Creswell Bay 8862. Bellot Strait: Fox Islands 8823. Gulf of Boothia: Victoria Harbour 8783, Netsiksiuvik Inlet 8776. Davis Strait: Frobisher Bay CANA 16975. Hudson Strait: Westbourne Bay 2459, Negus Bay 2557, Wakeham Bay 2654, Ivugivik 2602. Repulse Bay: Talun Bay 74-256-3. Hudson Bay: Munn Bay 74-254-5, Ches- terfield Inlet Savile and Watts 928, Eskimo Point 74-250-4, Churchill Crum 7665. Northwestern distribution. Literature records. Barrow Strait: Union Bay and Assistance Bay (Dickie 1852, as A. turneri). New records. Wellington Channel: Porden Point 9532, Emery Bay 9723. Barrow Strait: Rigby Bay 9325. Family Alariaceae Alaria esculenta (Linnaeus) Greville Kjellman 1883, p. 212, pls. 20-22, also as A. dolichorhachis, and A. oblonga; Taylor 1957, p. 186, pl. 21, fig. 2, also as A. musaefolia; Lund 1959, p. 168; Widdowson 1971, p. 29, fig. 12 At the 3-20 m depth on rocks and shells. Occasional. Eastern distribution. Literature records. Smith Sound: 78-82° N. (Ashmead 1864). Lancaster Sound: Dundas’ Harbour (Wheldon 1947). Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938, Wheldon 1947). Hudson Strait: Forbes Sound (Wheldon 1947), Wakeham Bay and Cape Wols- tenholme (Bell and MacFarlane 1938), Hudson Strait (Bell and MacFarlane 1933). Hudson Bay: South Bay (Wheldon 1947), Hudson Bay (Bell and MacFarlane 1933). New records. Jones Sound: Cape Skogn 9203, near Cape Newman Smith 9232. Fram Sound: Rodberg Bay 9785. Prince Regent Inlet: Creswell Bay 8907. Bellot Strait: Fox Islands 8824, near Brands Islands 74-261-7. Gulf of Boothia: Victoria Harbour 8759. Hudson Strait: Negus Bay 2596, Wakeham Bay 2648. Southwestern distribution. 47 New records. Victoria Strait: Victory Point 8654. Dolphin and Union Strait: Cockburn Point CANA 4063. Amundsen Gulf: Gillet Bay 6740, Police Point 6637. Northwestern distribution. Literature records. Penny Strait: Northumberland Sound (Harvey 1858, as Alaria pylaii accord- ing to Widdowson 1971). New records. Belcher Channel: Cape Ursula 9729. Penny Strait: near Russell Island 9739. Queens Channel: near Cape Becher 9752, Milne Island 9085. Wellington Channel: Emery Bay 9737, Snowblind Bay 9738. Barrow Strait: near Cape Dungeness 9514, Cunningham Inlet 9768. Alaria grandifolia J. Agardh Kjellman 1883, p. 217; Taylor 1955, p. 187; Lund 1959, p. 166, as A. pylaii f. grandifolia; Widdowson 1971, p. 33, fig. 14. Within the 3 and 25 m depth on rocks. Rare. Eastern distribution. New records. Gulf of Boothia: Netsiksiuvik Inlet 8742. Northwestern distribution. New records. Barrow Strait: Cunningham Inlet 9769. Alaria pylaii (Bory) Greville Kjellman 1883, p. 213; Rosenvinge 1893, p. 838; 1898, p. 48; Taylor 1955, p. 188; Lund 1959, p. 166, in part; Widdowson 1971, p. 41, fig. 20. Within the 2 and 20 m depth on rocks. Rare. Eastern distribution™. Literature records. Jones Sound: Craig Harbour (Lund 1933). New records. Wellington Channel: Emery Bay 9733. Order Fucales Family Fucaceae Fucus distichus Linnaeus subsp. distichus Kjellman 1883, p. 210, pl. 19, fig. 3, also as *The Alaria membranacea (also known as A. pylaii f. membranacea) specimens reported by Collins (1927a) from the southwestern region in Dolphin and Union Strait (CANA 4062 and 4063) are of A. esculenta. F. filiformis and F. linearis; Rosenvinge 1893, p. 834, as F. inflatus var. linearis; 1898, p. 45, as F. inflatus, in part; Taylor 1957, p. 190, pl. 23, fig. 2, as F. filiformis; Powell 1957, p. 420, pl. 1, fig. 2; Lund 1959, p. 169, as F. inflatus f. linearis. On rocks, intertidal in St. Roch Basin, within the 0 and 10 m depth elsewhere. Occa- sional. Eastern distribution. Literature records. Jones Sound: Craig Harbour (Lund 1933, as Fucus inflatus). Southwestern distribution. Literature records. Dolphin and Union Strait: Cape Young (Collins 1927a, as F. inflatus f. distichus, CANA 4066). New records. St. Roch Basin: Peel Inlet 8977. Simpson Strait: © M’Clintock 74-264-5, Queen Maud Gulf: Royal Geographical Islands 8629, Enterprise Point 7897, Anderson Bay 8265, 8459, Foggy Bay 8078, near Minto Islands 8077. _Coronation Gulf: Anchor Island 6973. Amundsen Gulf: De Salis Bay 4528, Sachs Harbour 3334. Northwestern distribution. New records. Beaufort Sea: Cape Prince Alfred 3059. Bay Fucus distichus subsp. anceps (Harvey and Ward) Powell Powell 1957, p. 421, pl. 2, fig. 1. Eastern distribution. Literature records. Hudson Strait: False River Bay and Koksoak River (Wilce 1959). Fucus distichus subsp. edentatus (De la Pylaie) Powell Kjellman 1883, p. 204, as F. edentatus; Rosenvinge 1893, p. 834, as F. inflatus var. edentatus; Taylor 1957, p. 191, pl. 23, fig. 3, as F. edentatus; Powell 1957, p. 424, pl. 2, fig. 2; Lund 1959, p. 169, as F. tnfratgs=a: edentatus. On rocks, intertidal in Hudson Strait and Hudson Bay, and at the 3-8 m depth in Amundsen Gulf. Eastern distribution. Literature records. James Bay: James Bay (Setchell and Collins 1908, as Fucus edentatus). New records. Hudson Strait: Sugluk Inlet 2677. Hudson Bay: Rankin Inlet 74-253A-1, Great Whale River Savile 397. James Bay: Moose River Riley 129. Southwestern distribution. New records. Amundsen Gulf: Police Point 4377. Fucus distichus subsp. evanescens (C. Agardh) Powell Kjellman 1883, p. 202, as F. evanescens; Rosenvinge 1893, p. 834, as F. inflatus var. evanescens; Taylor 1957, p. 193, pl. 23, fig. 4, pl. 24, fig. 2, as F. evanescens; Powell 1957, p. 426; Lund 1959, p. 169, as F. inflatus f. evanescens. On rocks within the 0 and 10 m depth. Also on intertidal rocks in the eastern region (Kane Basin southward). Frequent. Eastern distribution. Literature records. Smith Sound: Fram Haven and southern Pim Island (Rosenvinge 1926, as Fucus inflatus f. evanescens), 78-82° N. (Ashmead 1864, as F. evanescens). Jones Sound: Craig Harbour (Bell and MacFarlane 1938, as F. evanescens), Harbour Fjord, Goose Fjord, and “Jammer Bay” or Bay of Woe (Rosen- vinge 1926), as F. inflatus f. evanescens). Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938, as F. evanescens). Baffin Bay: Clyde (Bell and MacFarlane 1938, as F. evanescens). Hudson Strait: Westbourne Bay (Bell and MacFarlane 1938, Wheldon 1947; both as F. evanescens), Wakeham Bay and Cape Wolstenholme (Bell and MacFarlane 1938, as F. evanes- cens), Hudson Strait (Bell and Mac- Farlane 1933, as F. evanescens). Hudson Bay: Southampton Island (Bell and MacFarlane 1938, as F. evanes- cens), between Otaska Harbour and Black Whale Harbour, Long Island Sound (Howe 1927, as F. evanescens, CANA 4229, and 4231) Depot Island (Setchell and Collins 1908, as F. evanescens), Churchill (Bell and Mac- Farlane 1938, as F. evanescens), Hudson Bay (Bell and MacFarlane 1933, as F. evanescens). James Bay: Grey Goose Island and near Halfway Point (Howe 1927, as F. evan- escens, CANA 4232 and 4230). New records. Kane Basin: Copes Bay 9690, northern Pim Island 9557. Jones Sound: Cape Skogn 9205, near Cape Newman Smith 9235, Boat Point 9168. Adams Sound: Arctic Bay 2775. Prince Regent Inlet: Creswell Bay 8885. Eclipse Sound: near Pond Inlet 2698. Davis Strait: Frobisher Bay CANA 16974. Hudson Strait: Westbourne Bay 2474, 2533, Negus Bay 2558, Wakeham Bay 2624, 2666. Foxe Channel: 255A-8. Repulse Bay: Talun Bay 74-256-4. Hudson Bay: Munn Bay 74-254-13, Rankin Inlet 74-253A-2. James Bay: Moose River CANA 18363, Ekwan River CANA 8771. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8966. Simpson Strait: Eta Island 9008. Victoria Strait: Victory Point 8950. Queen Maud Gulf: Royal Geographical Society Islands 8625, Enterprise Point 7896, Anderson Bay 8174, 8455, near Minto Islands 7950. Dease Strait: Starvation Cove 7239, near Duncan Island 7167. Melville Sound: Kuururjuak Point 8409, Hurd Islands 8339. Bathurst Inlet: Cape Croker 8477. Dolphin and Union Strait: Bernard Har- bour 6834, Cockburn Point 8572. Amundsen Gulf: Pearce Point 4470, Gillet Bay 6781, Police Point 4285, 6656, Booth Island 6627. Northwestern distribution. New records. Barrow Strait: Cunningham Inlet 9763. Stanley Harbour 74- Fucus vesiculosus Linnaeus Kjellman 1883, p. 198; Rosenvinge 1893, p. 833; Waern 1952, p. 166, fig. 75; Taylor 1957, p. 192, pl. 25, figs. 1-3; Lund 1959, p. 168. Eastern distribution. Literature records. Smith Sound: 78-82° N. (Ashmead 1864). Jones Sound: Craig Harbour (Wheldon 1947). Eclipse Sound: Pond Inlet (Wheldon 1947). Baffin Bay: Bethune Bay (Dickie 1871), Clyde (Wheldon 1947). Davis Strait: Pangnirtung (Bell and Mac- Farlane 1938), Dickie 1867). Hudson Strait: Forbes Sound, West- bourne Bay, and Wakeham Bay (Whel- don 1947). Hudson Bay: South Bay (Wheldon 1947). Cumberland Sound Ascophyllum nodosum (Linnaeus) Le Jolis Kjellman 1883, p. 194, as Ozothallia nodosa; Rosenvinge 1893; p. 832; Taylor 1957, p. 195, pl. 27, figs. 1-2; Lund 1959, D. ai, Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867, as Fucus nodosus). Hudson Strait: Forbes Sound (Wheldon 1947, Wilce 1959), False River Bay (Wilce 1959). DIVISION RHODOPHYTA Class Rhodophyceae Subclass Bangiophycidae Order Bangiales Family Bangiaceae Erythrotrichia carnea (Dillwyn) J. Agardh Kjellman 1883, p. 193, as E. ceramicola; Taylor 1957, p. 202, pl. 28, figs. 13-15. At the 5-6 m depth. Eastern distribution. Literature records. James Bay: Charlton Island (Howe 1927, CANA 4234). Erythrocladia irregularis Rosenvinge Rosenvinge 1909, p. 72, figs. 11-12; Zinova 1955, p. 47, fig. 39. At depths somewhere between 2 and 9 m, epiphytic on the holdfast of a Laminaria at lvugivik Harbour and on Polysiphonia arctica at Foggy Bay. Rare. Eastern distribution. New records. Hudson Bay: Ivugivik Harbour 2594.2. Southwestern distribution. New records. Queen Maud Gulf: Foggy Bay 8779. Erythrocladia polystromatica P. Dangeard Waern 1952, p. 180, figs. 77-78; Zinova 1955, p. 48, fig. 41. Epiphytic on Polysiphonia arctica at a depth between 2 and 9 m. Rare. Southwestern distribution. New records. Queen Maud Gulf: Foggy Bay 8122. Erythropeltis discigera var. flustrae Batters Taylor 1957, p. 205, pl. 29, figs. 1-2. On hydroids (e.g., Eudendrium) at depths of 7-15 m. Rare. Northwestern distribution. New records. Viscount Melville Sound: near Little ~ Point DH2S7-8. Wilkins Strait, south of: Brock Island 3163.1. Porphyra miniata (C. Agardh) C. Agardh Kjellman 1883, p. 188, pls. 17-18, as Diplo- derma amplissimum, D. miniatum, and Porphyra abyssicola; Rosenvinge 1893, p. 826, fig. 14; 1898, p. 44; Zinova 1955, p. 52, figs. 46-50, also as P. abyssicola, and P. amplissima; Taylor 1956, p. 207. Subtidal. Eastern distribution.* Literature records. Hudson Strait: Ungava Bay (Farlow 1886), Forbes Sound and Koksoak River (Wilce 1959). Porphyra purpurea (Roth) C. Agardh Kjellman 1883, p. 190, as P. laciniata f. typi- ca; Rosenvinge 1893, p. 830, as P. umbili- Calis, in part; Zinova 1955, p. 51, as P. lacini- ata; Taylor 1957, p. 206, as P. umbilicalis, in part. Subtidal. Eastern distribution. * Literature records. Hudson Strait: Wakeham Bay (Bell and MacFarlane 1938, as Porphyra laci- niata). Hudson Bay: Hudson Bay (Bell and MacFarlane 1933, as P. laciniata). SUBCLASS FLORIDIOPHYCIDAE Order Nemaliales Family Acrochaetiaceae Acrochaetium parvulum (Kylin) Hoyt Rosenvinge 1893, p. 825, as Chantransia microscopica; 1898, p. 40, figs. 10-11; 1909, p. 93, figs. 24-26, as C. hallandica f. parvula; Lund 1959, 'p: 173, fig. 35. * The Conchocelis-phase in the life cycle of Porphyra (and possibly Bangia, which occurs on the western side of Greenland) has been reported by Rosenvinge 1926 (as C. rosea) from Smith Sound in Rice Strait and Jones Sound in Harbour Fjord. * See footnote to Porphyra miniata. At Rankin Inlet intertidal on Polysiphonia arctica. Elsewhere at depths of 2-35 m on Chaetomorpha melagonium, Cladophora, Acrosiphonia arcta, Pilayella littoralis, Spha- celaria plumosa, Stictyosiphon tortilis, Des- marestia aculeata, Dictyosiphon foenicula- ceus, Polysiphonia arctica, Rhodomela lycopodioides, and Odonthalia_ floccosa. Frequent in the southwest, occasional in the east. Eastern distribution. New records. Prince Regent Inlet: Creswell Bay 8875. Hudson Bay: Munn Bay /74-255-13, Rankin Inlet 74-253A-13, Eskimo Point 74-250-117. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8988. Simpson Strait: Eta Island 8693, 9029. Queen Maud Gulf: Enterprise Point 7936, Anderson Bay 8223, 8449, Foggy Bay 8738, near Minto Islands 7978. Dease Strait: Starvation Cove 7275, Qikirtaarjuk Islands 77177, near Duncan Island 7197. Elu Inlet: unnamed island 8039. Melville Sound: Kuururjuak Point 8403, Hurd Islands 8336. Bathurst Inlet: Cape Croker 8482. Dolphin and Union Strait: Bernard Har- bour 6863, Cockburn Point 8559. Prince of Wales Strait: Berkeley Point 9483. Amundsen Gulf: De Salis Bay 4563, Thesiger Bay 3373, Pearce Point 4407, Gillet Bay 6748, Police Point 6629, Booth Island 6609. Audouinella efflorescens (J. Agardh) Papen- fuss Kjellman 1883, p. 129, pl. 12, figs. 1-2, as Chantransia efflorescens; Rosenvinge 1898, p. 40, as C. efflorescens; Waern 1952, p. 182; Zinova 1955, p. 61, fig. 55; Taylor 1957, p. 225; Lund 1959, p. 178, fig. 37; Woelkerling 1973, p. 584. At depths within 2 and 35 m usually grow- ing on other algae, less often on rocks, hy- droids, and bryozoans. Occasional. Eastern distribution. Literature records. Jones Sound: Goose Fjord (Rosenvinge 1926, as Chantransia efflorescens). New records. Hudson Bay: Munn Bay 74-255-9, Eskimo Point 74-250-16. Southwestern distribution. New records. Simpson Strait: Eta Island 8664, 9023. Queen Maud Gulf: Anderson Bay 8766, Foggy Bay 8062, near Minto Islands 7977. Dease Strait: Qikirtaarjuk Islands 7775, Wellington Bay 62-7305-2. Coronation Gulf: Anchor Island 6946. Prince of Wales Strait: Berkeley Point 9484. Amundsen Gulf: Sachs Harbour 3369, Gillet Bay 6749, Police Point 6668, Booth Island 6580. Northwestern distribution. New records. Queens Channel: Milne Island 9702. Byam Channel: near Robertson Point DH22-13. Audouinella hallandicum (Kylin) Woelkerling Taylor 1957, p. 213, as Kylinia hallandica; Lund 1959, p. 178, fig. 36; Woelkerling 1973, p. 82, figs. 1-4. At depths between 3 and 8 m. Epiphytic on Chaetomorpha melagonium at Bernard Har- bour, Rhodomela lycopodioides at Police Point, and Acrosiphonia hystrix at Pim Island. Rare. Eastern distribution. Literature records. Smith Sound: Pim Island (Rosenvinge 1926, as Chantransia hallandica). Southwestern distribution. New records. Dolphin and Union Strait: Bernard Har- bour 6867. Amundsen Gulf: Police Point 4240. Audouinella purpurea (Lightfoot) Woelkerling Kjellman 1883, p. 184, pl. 15, figs. 8-13, as Rhodochorton intermedium and R. rothii; Rosenvinge 1893, p. 791, as RA. rothii; Waern 1952, p. 183, as A. rothii; Zinova 1955, p. 63, fig. 57, as R. purpureum; Taylor 1957, p. 226, pl. 45, figs. 1-2, as R. purpureum; Lund 1959, p. 184, fig. 38, as R. purpureum; Woelkerling 1973, p. 536, figs. 52-55. On intertidal boulders near Pond Inlet, oc- Curring in dense populations made up entire- ly of the form known as Rhodochorton pur- pureum f. intermedium (Kjellman) S. Lund. Rare. Eastern distribution. Literature records. Smith Sound: Fram Haven (Rosenvinge 1926, as Rhodochorton rothii). 51 Jones Sound: Cape Vera and “Bgrgo”’ (Rosenvinge 1926, as R. rothii). Lancaster Sound: Dundas_ Harbour (Wheldon 1947, as RA. rothii). Baffin Bay: Cape Adair (Dickie 1853, as Callithamnion rothii). Davis Strait: Cumberland Sound (Dickie 1867, as C. rothii; Farlow 1879, as C. rothii). Hudson Strait: Forbes Sound, False River Bay, and Koksoak River (Wilce 1959, as R. purpureum). New records. Eclipse Sound: near Pond Inlet 2709. Audouinella spetsbergense (Kjellman) Woel- kerling Kjellman 1883, p. 186, pl. 16, figs. 6-7, as Rhodochorton sparsum, R. mesocarpum f. penicilliformis, and RR. spetsbergense; Rosenvinge 1893, p. 792, fig. 9, as R. meso- carpum var. penicilliforme; 1898, p. 23; Zinova 1955, p. 62, fig. 56, as R. penicilli- forme; Taylor 1957, p. 225, as R. penicilli- forme; Woelkerling 1973, figs. 61-63. Intertidal and subtidal on other algae, such as Chaetomorpha melagonium and Sphacelaria arctica. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926, as Rhodochorton penicilli- forme). Hell Gate: ‘‘Excrement Bay’ or Cross Bay, “Reindeer Bay’, and ‘Hare Point” (Rosenvinge 1926, as R. peni- cilliforme). Davis Strait: Cumberland Sound (Dickie 1867, as Callithamnion sparsum). Hudson Strait: Forbes Sound (Wilce 1959, as R. penicilliforme). Colaconema membranacea (Magnus) Woel- kerling Rosenvinge 1893, p. 794, fig. 10, as Rhodo- chorton membranaceum; Taylor 1957, p. 224, pl. 31, figs. 11-12, as Audouinella membrana- cea; Lund 1959, p. 182, as A. membranacea; Woelkerling 1973, p. 566, figs. 64-65. On bryozoans and, more commonly, hy- droids. In the intertidal zone at Rankin Inlet, at depths of 3-15 m at other locations. Occa- sional. Eastern distribution. New records. Bellot Strait: Fox Islands 8843. Hudson Bay: Rankin Inlet 74-253A-20. 52 Southwestern distribution. New records. Dease Strait: Qikirtaarjuk Islands 7134. Coronation Gulf: Anchor Island 6945. Amundsen Gulf: Prince Albert Sound 9470, Gillet Bay 6770, Police Point 4352, 6669. Northwestern distribution. New records. Viscount Melville Sound: Nelson Grif- fiths Head DH8-9, near Little Point DH2S7-11. Wilkins Strait, south of: Brock Island 3161.2. Order Cryptonemiales Family Dumontiaceae Dumontia incrassata (O.F. Miller) Lamou- roux. Kjellman 1883, p. 157, as D. filiformis; Rosenvinge 1893, p. 786, as D. filiformis; Zinova 1955, p. 68, figs. 60-61; Taylor 1957, p. 234, pl. 35, tig. 7; pl 41, fig. &. A few small-sized thalli of this species was in the loose-lying community found at the 3-8 m depth on the mud bottom of Sachs Harbour. Rare. Eastern distribution. Literature records. Lancaster Sound: Dundas Harbour (Bell and MacFarlane 1938, as Dumontia filiformis). Eclipse Sound: Pond Inlet (Bell and Mac- Farlane 1938, as D. filiformis). James Bay: Grey Goose Island (Howe 1927). Southwestern distribution. New records. Amundsen Gulf: Sachs Harbour 4650. Neodilsea integra (Kjellman) Zinova Kjellman 1883, p. 152, pl. 14, figs. 1-3, as Sarcophyllis arctica; Rosenvinge 1898, p. 19, fig. 3, as Dilsea integra; Zinova 1955, p. 66, figs. 58-59, as D. integra; 1961, p. 82, figs. 1-2; Taylor 1957, p. 235, as D. integra; Lund 1959, p. 189, as D. integra. At the 2-25 m depth on rocks and loose- lying on mud substrates. Sometimes on the holdfast of Laminaria and barnacles. Fre- quent. Eastern distribution. Literature records. Hudson Strait: Forbes Sound and Kok- soak River (Wilce 1959, as Dilsea integra). Hudson Bay: between Otaska Harbour and Black Whale Harbour (Howe 1927, as D. integra, CANA 4245). New records. Jones Sound: Cape Skogn near Cape Newman Smith 9244. Prince Regent Inlet: Creswell Bay 8867. Gulf of Boothia: Netsiksiuvik Inlet 8725. Hudson Strait: Westbourne Bay 2574. Hudson Bay: Eskimo Point 74-250-39, Churchill Crum 7632. James Bay: Swan River CANA 4803. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a, as Sarcophyllis arctica, CANA 4033). New records. St. Roch Basin: Peel Inlet 8973. Simpson Strait: Eta Island 8680, 8995. Queen Maud Gulf: Royal Geographical Society Islands 8599, Enterprise Point 7926, Anderson Bay 8771, 8273, Foggy Bay 8073, near Minto Islands 7980. 9225, Dease Strait: Qikirtaarjuk Islands 6985. Melville Sound: Hurd Islands 8320. Dolphin and Union Strait: Cockburn Point 8566. Amundsen Gulf: Pearce Point 4467, Gillet Bay 6743, Police Point 4333, 6646, Booth Island 6530. Northwestern distribution. New records. Wellington Channel: 9149. Barrow Strait: Allison Inlet 9366. Beaufort Sea: Cape Prince Alfred 3073. Snowblind Bay Family Squamariaceae Peyssonelia johanseni Howe Howe 1927, p. 25, pl. 2. “On stones at low tide.” Eastern distribution. Literature records. James Bay: near Halfway Point (Howe 1927, CANA 4252 isotype). Peyssonelia rosenvingii Schmitz Rosenvinge 1893, p. 782, fig. 8; 1898, p. 14; Zinova 1955, p. 73, fig. 64; Taylor 1957, p. 240; Lund 1959, p. 190. On cobbles and pebbles at a depth of 9 m. Rare. Eastern distribution. Literature records. Baffin Bay: Cape Adair (Dickie 1853, as P. dubyi). Northwestern distribution. New records. Byam Martin Channel: Point DH11S17-3. Viscount Melville Sound: near Little Point DH2S2-8. near Burnett Rhodophysema Crouan) Dixon Rosenvinge 1898, p. 18, as Rhododermis elegans; Zinova 1955, p. 74, fig. 65, as R. parasitica; Taylor 1957, p. 238, as R. elegans; Lund 1959, p. 191, as A. elegans. From 21 m to shallower depths on rocks and (at Anderson Bay) on Phyllophora trun- cata. Rare. Eastern distribution. Literature records. Jones Sound: Harbour Fjord and Cape Vera (Rosenvinge 1926, as Rhodo- dermis elegans). Fram Sound: Norfolk Inlet (Rosenvinge 1926, as R. elegans). Southwestern distribution. New records. Queen Maud Gulf: Royal Geographical Society Islands 8604, Anderson Bay 8270. Northwestern distribution. Literature records. Crozier Channel: Mould Bay (Lee 1966). New records. Byam Martin Channel: near Towson Point DH17-3. Byam Channel: near Robertson Point DH22-5. elegans (Crouan- and Halosacciocolax kjellmanii Lund Lund 1959, p. 193, figs. 40-41. Parasitic growth on Halosaccion ramenta- ceum at the 3-9 m depth. Occasional. Eastern distribution. New records. Kane Basin: northern Pim Island 9577. Jones Sound: Cape Skogn 92172. Southwestern distribution. New records. Simpson Strait: Eta Island 9027. Northwestern distribution. New records. Queens Channel: 9759. Wellington Channel: 9154. McDougall Sound: Brooman Point 9255. near Cape Becher Snowblind Bay 53 Halosacciocolax lundii Edelstein Edelstein 1972, p. 251, figs. 1-10; Guiry 1974, p. 31, figs. 1-6. Parasitic growth on Rhodymenia palmata at the 2-8 m depth. Occasional. Eastern distribution. New records. Jones Sound: Cape Skogn 9209. Adams Sound: Arctic Bay on 2735. Davis Strait: Frobisher Bay CANA 16954. Southwestern distribution. New records. Simpson Strait: Eta Island 9002. Queen Maud Gulf: Royal Geographical Society Islands 8679. Northwestern distribution. New records. Wellington Channel: 9157. Snowblind Bay Family Hildenbrandiaceae Hildenbrandia prototypus Nardo Kjellman 1883, p. 139, as Hildbrandtia rosea; Rosenvinge 1893, p. 826; 1898, p. 43; both as H. rosea; Waern 1952, p. 184; Zinova 1955, p. 75, fig. 66; Taylor 1957, p. 241, pl. 36, figs. 9-10; Lund 1959, p. 195. On intertidal and subtidal rocks at Pang- nirtung and Ungava Bay. In our collections on rocks at the 2-30 m depth. Rare. Eastern distribution. Literature records. Davis Strait: 1947). Hudson Strait: Ungava Bay (Wilce 1959). New records. Gulf of Boothia: Netsiksiuvik Inlet 8744. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a, CANA 4037). New records. Queen Maud Gulf: Foggy Bay 8752. Melville Sound: Hurd Islands 8348. Bathurst Inlet: Cape Croker 8507. Pangnirtung (Wheldon Family Corallinaceae* Clathromorphum (Kjellman) Foslie Kjellman 1883, p. 101, pl. 6, figs. 8-12; compactum *Mesophyllum_ lichenoides_ (Ellis) Lemoine and Lithothamnium fasciculatum (Lamarck) Areschoug re- ported by Dickie (1953), respectively, from Cape Adair in Baffin Bay and Erebus Bay in Barrow Strait are too doubt- ful to be included in the Canadian Arctic flora. Rosenvinge 1893, p. 774, fig. 3, as Litho- thamnium circumscriptum; 1898, p. 11, as L. compactum and L. circumscriptum; Foslie 1929, p. 28, pl. 41, figs. 1-12; Zinova 1955, p. 78, figs. 67-68, as L. compactum; Taylor 1957, p. 243, as Phymatolithon compactum; Lund 1959, p. 200, as L. compactum, Adey 1965, p. 540, ‘pls. 1-5 in part, also as C. circum- scriptum. On rocks and shells of limpets and bi- valves at the 2-15 m depth. Occasional. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926, as Lithothamnium compactum). Jones Sound: Harbour Fjord, Goose Fjord, ‘“Jammer Bay” or Bay of Woe, and Cape Vera (Rosenvinge 1926, as L. compactum). Hell Gate: “Excrement Bay” or Cross Bay (Rosenvinge 1926, as L. compac- tum). Hudson Bay: between Richmond Gulf and Great Whale River, and Long Island Sound (Howe 1927, as Phyma- tolithon compactum). New records. Adams Sound: Arctic Bay 2725. Bellot Strait: Fox Islands 8840.17. Gulf of Boothia: Victoria Harbour 8797. Hudson Bay: Munn Bay 74-255-7. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a, as L. com- pactum). New records. Queen Maud Gulf: Anderson Bay 8799. Dolphin and Union Strait: Cockburn Point 8563. Prince of Wales Strait: Princess Royal Islands 9490. Amundsen Gulf: Cape Ptarmigan 9476.17, Prince Albert Sound 9460, 9472, Pearce Point 4508, Booth Island 6674. Northwestern distribution. New records. Wellington 9531.1. Barrow Strait: Rigby Bay 9328.1, Rad- stock Bay 93217, Intrepid Bay 9398. McDougall Sound: Templeton Bay 9119.2, Freemans Cove 9375. Channel: Porden’ Point Lithothamnium foecundum Kjellman Kjellman 1883, p. 99, pl. 5, figs. 11-19; Rosenvinge 1893, p. 778, figs. 4-7, as L. tenue, in part; 1898, p. 12; Foslie 1929, p. 40, pl. 2, figs. 12-14; Zinova 1955, p. 85, figs. 74-75; Taylor 1957, p. 246; Lund 1959, p. 198; Adey 1966, p. 325, pl. 5, fig. 23, pl. 6, fig. 24, pl. 8, figs. 38, 42, pl. 15, figs. 96-98, as Leptophytum foecundum. On rocks and shells of barnacles and bi- valves at depths of 2-20 m. Occasional. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Harbour Fjord and Cape Vera (Rosenvinge 1926). Cardigan Strait: Devil Island (Rosen- vinge 1926). New records. Hali Basin: Discovery Harbour 9670. Kane Basin: Norman Lockyer Island 9713, northern Pim Island 9606. Adams Sound: Arctic Bay 2724. Prince Regent Inlet: Creswell Bay 8890. Bellot Strait: Fox Islands 8840.2. Gulf of Boothia: Netsiksiuvik Inlet 8734. Southwestern distribution. New records. Prince of Wales Strait: Princess Royal Islands 9493.2: Amundsen Gulf: Cape Ptarmigan 9474.17. Northwestern distribution. New records. Nanson Sound: Cape St. Andrew 9546, Butter Porridge Point 9555. Sverdrup Channel: near East Fjord 9727. Wellington Channel: Porden_ Point 9529.1. McDougall Sound: Freemans Cove 9317.1. Viscount Melville Sound: near Little Point DHS7-17. Wilkins Strait, south of: Brock Island 3158. Lithothamnium glaciale Kjellman Kjellman 1883, p. 93, pls. 2-3; Rosenvinge 1893, p. 773; 1898, p. 9; Foslie 1929, p. 41, pl. 18, figs. 10-22, pls. 21, 23-24, also as L. col- liculosum and L. granii; Zinova 1955, p. 87, figs. 77-78, also as L. colliculosum; Taylor 1957, p. 247, also as L. colliculosum. On rocks at depths of 2-15 m. Occasional. Eastern distribution. Literature records. Jones Sound: Harbour Fjord, ‘Jammer Bay” or Bay of Woe (Rosenvinge 1926). Hell Gate: ‘‘Excrement Bay” or Cross Bay (Rosenvinge 1926). Hudson Bay: between Richmond Gulf and Great Whale River, and Long Island Sound (Howe 1927). New records. Adams Sound: Arctic Bay 2723. Gulf of Boothia: Victoria Harbour 8798. Hudson Bay: Munn Bay 74-255-3. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a). New records. Queen Maud Gulf: Anderson Bay 8200. Bathurst Inlet: Cape Croker 8500, Buchan Bay 8533. Prince of Wales Strait: Princess Royal Islands 9497, Berkeley Point 9487. Amundsen Gulf: Cape Ptarmigan 9477, Prince Albert Sound 9464, 9473. Northwestern distribution. New records. Wellington Channel: Porden_ Point 9530.2. Wilkins Strait, south of: Brock Island 3168. Lithothamnium laeve (Stromfelt) Foslie Rosenvinge 1893, p. 778, figs. 4-7, as L. tenue, in part; 1898, p. 14; Foslie 1929, p. 43, pl. 3, figs. 4-9; Taylor 1957, p. 246; Lund 1959, p. 198; Adey 1966, p. 324, pl. 5, figs. 21-22, pl. 8, figs. 35-37, 39-41, pl. 11, figs. 60-62, pls. 12-13, pl. 14, figs. 81-90, as Leptophytum laeve. On rocks and bivalve shells at depths of 7-24 m. Occasional. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Harbour Fjord, Goose Fjord, near Walrus Fjord, ‘“Jammer Bay” or Bay of Woe, and Cape Vera (Rosenvinge 1926). Hell Gate: “Excrement Bay” or Cross Bay (Rosenvinge 1926). Cardigan Strait: Devil Island (Rosen- vinge 1926). Hudson Bay: Richmond Gulf (Howe 1927, CANA 4224). New records. Kane Basin: Copes Bay 9697. Gulf of Boothia: Victoria Harbour 8778, Netsiksiuvik Inlet 8756. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a). 55 Northwestern distribution. New records. Sverdrup Channel: Expedition Fjord 9720. Wellington Channel: Porden’ Point 9529.2. Barrow Strait: Rigby Bay 9328.2, Intrepid Bay 9399. McDougall Sound: Templeton Bay 9720. Byam Martin Channel: near Burnett Point DH11S1-4. Byam Channel: near Robertson Point DH22-9. Viscount Melville Sound: near Little Point DH10-17. Wilkins Strait, south of: Brock Island OTT: Phymatolithon laevigatum (Foslie) Foslie Foslie 1929, p. 47, pl. 39, figs. 13-14; Taylor 1957, p. 244. Eastern distribution. Literature records. Hudson Bay: Long Island Sound (Howe 1927). Phymatolithon Foslie Kjellman 1883, p. 102, as Lithothamnium polymorphum; Zinova 1955, p. 80, figs. 68-70, as L. polymorphum; Taylor 1957, p. 243. Eastern distribution. Literature records. Barrow Strait: Erebus Bay (Dickie 1852, as Melobesia polymorpha), Union Bay (Dickie 1853, as M. polymorpha). polymorphum — (Linnaeus) Family Kallymeniaceae Callophyllis cristata (C. Agardh) Kutzing Kjellman 1883, p. 145; Rosenvinge 1893, p. 813: 1898, p. 28; Zinova 1955, p. 105, figs. 95-96; Taylor 1957, p. 256, pl. 60, figs. 2-3; Lund 1959, p. 201, — all as Euthora cristata; Hooper and South 1974, p. 424, figs. 1-7. At depths of 3-12 mon rocks, other algae, and Bryozoa. Occasional. Eastern distribution. Literature records (all as Euthora cristata). Jones Sound: Goose Fjord (Rosenvinge 1926). Hell Gate: ‘“‘Excrement Bay” or Cross Bay, ‘‘Reindeer Bay’, and Lands End (Rosenvinge 1926). Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879). Hudson Strait: Port Harvey and Forbes Sound (Wilce 1959), Ungava Bay (Farlow 1886), Wakeham Bay (Collins 1927b) Hudson Bay: Depot Island (Setchell and Collins 1908). New records. Jones Sound: Cape Skogn 9275. Bellot Strait: Fox Islands 8845. Davis Strait: Frobisher Bay CANA 16979. Hudson Strait: Westbourne Bay 2463. Hudson Bay: lvugivik 2594.3. Northwestern distribution. New records. Wellington Channel: 9156. Snowblind Bay Kallymenia schmitzii De Toni Rosenvinge 1893, p. 819, pl. 2, fig. 4, as Callymenia sanguinea; Zinova 1955, p. 104, fig. 94; Taylor 1957, p. 258. On rocks at depths of 10-25 m. Eastern distribution. Literature records. Jones Sound: ‘Jammer Bay” or Bay of Woe (Rosenvinge 1926). Hell Gate: ‘‘Reindeer Cove” (Rosenvinge 1926). Hudson Strait: Ungava Bay (Farlow 1886, as K. pennyi?), False River Bay and Koksoak River (Wilce 1959). Family Choreocolaceae Choreocolax odonthaliae Levring Levring 1935, p. 55, fig. 11; Kylin 1944, p. 48, fig. 38. Parasitic growth on Odonthalia dentata at the 5-19 m depth. Occasional. Eastern distribution. New records. Jones Sound: Cape Skogn 9207. Southwestern distribution. New records. Rasmussen 74-262C-9. Simpson Strait: Eta Island 8679, 9078. Queen Maud Gulf: Royal Geographical Society Islands 8623, Foggy Bay 8088. Northern distribution. New records. Viscount Melville Sound: Nelson Grif- fiths Point DH8-6. Basin: Peterson Bay Harveyella mirabilis (Reinsch) Schmitz and Reinke Rosenvinge 1893, p. 823; 1898, p. 39; Zinova 1955, p. 109, fig. 98; Taylor 1957, p. 260; Lund 1959, p. 202; Goff and Cole 1975, p. 227, figs. 1-28. Parasitic growth on Rhodomela lycopo- dioides at depths of 2-35 m. Frequent in southwestern region, occasional elsewhere. Eastern distribution. Literature records. Hudson Strait: False River Bay and Koksoak River (Wilce 1959). James Bay: James Bay (Setchell and Collins 1908). | New records. Jones Sound: Cape Skogn 9223. Hudson Bay: Eskimo Point 74-250-19. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8989. Rasmussen- Basin: Peterson 74-262B-10. Simpson Strait: Eta Island 8667, 9044. Queen Maud Gulf: Enterprise Point 7904, Anderson Bay 8230, 8464, Foggy Bay 8746, near Minto Islands 7990. Dease Strait: Starvation Cove 7265, Qikirtaarjuk Islands 7147. Coronation Gulf: Anchor Island 6990. Dolphin and Union Strait: Cockburn Point 8558. Amundsen Gulf: Sachs Harbour 3354.2, Gillet Bay 6793, Police Point 6687, Booth Island 6578. Northwestern distribution. New records. Barrow Strait: Allison Inlet 9379. Byam Channel: near Robertson Point DH7-4. Beaufort 3066.2. Bay Sea: Cape Prince Alfred Order Gigartinales Family Cruoriaceae Cruoria arctica Schmitz Rosenvinge 1893, p. 784; 1898, p. 15, fig. 1; 1910, p. 102; Kjellman 1906, p. 14, pl. 1, figs. 1-7, as C. firma; Taylor 1957, p. 262; Lund 1959, p. 203. On rocks and barnacles at depths within 2 and 25 m. Occasional. This small, crust- forming alga, of which our collection con- sisted only of sterile specimens, is a pos- sible tetrasporophytic phase in a life cycle with Turnerella pennyi according to South et al. (1972). Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: ‘Jammer Bay” or Bay of Woe (Rosenvinge 1926). New records. Hall Basin: Discovery Harbour 9677. Kane Basin: northern Pim Island 9604. Gulf of Boothia: Victoria Harbour 8779, Netsiksiuvik Inlet 8745. Cruoriopsis hyperborea Rosenvinge Rosenvinge 1910, p. 102, fig. 2; Taylor 1957, p. 239; Lund 1959, p. 208. At about the 10 m depth on rocks, barna- cles, and corallines. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Harbour Fjord, and ‘Jammer Bay” or Bay of Woe (Rosen- vinge 1926). Petrocelis polygyna (Kjellman) Schmitz Kjellman 1883, p. 142, pl. 11, as Haemes- charia polygyna; Rosenvinge 1898, p. 16, fig. 2; Zinova 1955, p. 114, figs. 101-102; Lund 1959; p.. 205: On rocks and shells. Eastern distribution. Literature records. Jones Sound: “Bgrgo” (Rosenvinge 1926, as Petrocelis sp., according to Lund 1959). Northwestern distribution. Literature records. Crozier Channel: Manson Point (Lee 1966). Petrocelis sp. On rocks at the 2-10 m depth. Occasional. Some specimens (e.g., those from near Bur- nett Point) have cell dimensions approxi- mating those of Petrocelis polygyna. Most have much larger cells, with widths of up to 14.2 zs and lengths as much as 6 times the width. Southwestern distribution. New records. Victoria Strait: Victory Point 8948. Queen Maud Gulf: Royal Geographical Society Islands 8628, near Minto Islands 7995. Dease Strait: Starvation Cove 7255, near Duncan Island 7786. 57 Amundsen Gulf: Police Point 6665, Booth Island 6585. Northwestern distribution. New records. Byam Martin Channel: Point DH11S1-5. near Burnett Family Solieriaceae Turnerella pennyi (Harvey) Schmitz Kjellman 1883, p. 160, pl. 14, figs. 4-6, as Kallymenia pennyi, K. rosacea, and K. sep- temtrionalis; Rosenvinge 1893, p. 815, fig. 3, pl. 2, fig. 3, also as T. septemtrionalis; 1898, p. 29, fig. 5; Zinova 1955, p. 120, figs. 105-108, also as T. septemtrionalis; Taylor 1957, p. 265; Lund 1959, p. 209, fig. 42; South et al. 1972, p. 221, figs. 1-138. At the 7-25 m depth on rocks. Occasional. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Jones Sound: Harbour Fjord, Walrus Fjord, ““Jammer Bay” or Bay of Woe, and Cape Vera (Rosenvinge 1926). Hell Gate: “Excrement Bay” or Cross Bay, ‘“Reindeer Cove’, and Lands End (Rosenvinge 1926). Bellot Strait: Port Kennedy (Dickie 1861, as Kallymenia pennyi). Davis Strait: Cumberland Sound (Dickie 1867, as K. pennyi). Hudson Bay: Richmond Gulf and be- tween Otaska Harbour and Black Whale Harbour (Howe 1927, CANA 4179 and 4181). New records. Hall Basin: Discovery Harbour 9662. Kane Basin: northern Pim Island 9602. Fram Sound: Rodberg Bay 9792. Prince Regent Inlet: Creswell Bay 8863. Bellot Strait: Fox Islands 8830. Gulf of Boothia: Victoria Harbour 8774, Netsiksiuvik Inlet 8729. Davis Strait: Frobisher Bay CANA 16956. Repulse Bay: Talun Bay 74-255B-2. Northwestern distribution. Literature records. Barrow Strait: Assistance Bay (Dickie 1852, Harvey 1858; both as K. penny). Queens Channel: 76°29’ N. 96°13’ W. (Harvey 1858, as K. penny). New records. Wellington Channel: Porden Point 9535. Barrow Strait: Assistance Bay 62-4001-1. Wilkins Strait, south of: Brock Island 3186. Family Rhodophyllidaceae Rhodophyllis dichotoma (Lepeschikin) Gobi Kjellman 1883, p. 144, pl. 12, fig. 3; Rosen- vinge 1893, p. 812; Zinova 1955, p. 127, figs. 113-116; Taylor 1957, p. 269, pl. 60, fig. 1. Subtidal, 15-25 m at Hell Gate. Eastern distribution. Literature records. Hell Gate: ‘‘Excrement Bay” or Cross Bay, and ‘‘Reindeer Bay” (Rosenvinge 1926). Davis Strait: Cumberland Sound (Farlow 1879, as Rhodophyllis veprecula). Hudson Strait: Ungava Bay (Farlow 1886, as R. veprecula), Port Harvey, Forbes Sound, and False River Bay (Wilce 1959). Family Phyllophoraceae Ahnfeltia plicata (Hudson) Fries Kjellman 1883, p. 166; Zinova 1955, p. 134, figs. 120-121; Taylor 1957, p. 275, pl. 45,410. ay pl. 40, fig. 6; Lund 1959, p. 214. Attached to rocks and loose-lying between the 3 and 18 m depth. Also intertidal in Hud- son Strait and Hudson Bay. Occasional. Eastern distribution. Literature records. Lancaster Sound: (Wheldon 1947). Bellot Strait: Port Kennedy (Dickie 1861, as Gymnogongrus plicatus). Eclipse Sound: Pond Inlet (Wheldon 1947). Davis Strait: Cumberland Sound (Dickie 1867). Hudson Strait: Forbes Sound (Wilce 1959), Hudson Strait (Bell and Mac- Farlane 1933). Hudson Bay: between Richmond Gulf and Great Whale River (Howe 1927, CANA 4159). James Bay: Grey Goose Island (Howe 1927, CANA 4160), Charlton Island (Bell and MacFarlane 1938), near Half- way Point (Howe 1927, CANA 4197), James Bay (Setchell and Collins 1908). New records. Hudson Bay: Munn Bay 74-255-10, Great Whale River Savile 398, Churchill Crum 7598. Southwestern distribution. Literature records. Dolphin and Union Strait: Cape Young (Collins 1927a, CANA 4078). Dundas’_ Harbour New records. Simpson Strait: Eta Island 9048. Queen Maud Gulf: Foggy Bay 8083. Bathurst Inlet: Cape Croker 8497. Phyllophora truncata (Pallas) Newroth and Taylor Kjellman 1883, p. 163, as P. brodiaei and P. interrupta; Rosenvinge 1893, p. 821; 1898, p. 32, fig. 6, both as P. brodiaei; Waern 1952, p. 190, as P. brodiaei; Zinova 1955, p. 131, figs. 117-119, as P. brodiaei and P. interrupta; Sever igo/, p. 2/8, pl. -39, fig. 2, as P. brodiaei and P. interrupta; Lund 1959, p. 212, as P. brodiaei; Newroth 1971, p. 226. At depths of 2-25 m loose-lying on mud substrates or attached to rocks, Laminaria haptera, and polychaete casings. Usually in dense populations. Frequent. Eastern distribution. Literature records. Smith Sound: 78-82° N. (Ashmead 1864, as Rhodymenia_ interrupta), Fram Haven and Pim Island (Rosenvinge 1926, as Phyllophora brodiaei). Jones Sound: Goose Fjord (Rosenvinge 1926, as P. brodiaei). Hell Gate: “Excrement Bay” or Cross Bay ‘Reindeer Bay’, ‘‘Hare Point’, and Lands End (Rosenvinge 1926, as P. brodiaei). Fram Sound: Norfolk Inlet (Rosenvinge 1926, as P. brodiaei). Bellot Strait: Port Kennedy (Dickie 1861, as RA. interrupta). Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938, as P. brodiaei). Davis Strait: Cumberland Sound (Farlow 1879, as P. interrupta). Hudson Strait: Ungava Bay (Farlow 1886, as P. interrupta), False River Bay and Koksoak River (Wilce 1959, as P. bro- diaei and P. interrupta). Hudson Bay: Depot Island (Setchell and Collins 1908, as P. brodiaei), Churchill (Bell and MacFarlane 1938, as P. brodiaei), between Otaska Harbour and Black Whale Harbour (Howe 1927, as P. interrupta, CANA 4254). James Bay: James Bay (Setchell and Collins 1908, as P. brodiaei). New records. Robeson Channel: near Cape Rawson 9628. Hall Basin: Discovery Harbour 9678. Kane Basin: Copes Bay 9698, northern Pim Island 9607. Jones Sound: near Cape Newman Smith 9242, Boat Point 9770. Prince Regent Inlet: Creswell Bay 8865. Gulf of Boothia: Victoria Harbour 8792, Netsiksiuvik Inlet 8724. Davis Strait: Frobisher Bay CANA 16967. Repulse Bay: Talun Bay 74-255B-7. Hudson Bay: Rankin Inlet 74-252A-4, Eskimo Point 74-250-8, Churchill Crum 7650. Southwestern distribution. Literature records. Dolphin and Union Strait: Bernard Har- bour, Cockburn Point and Cape Young (Collins 1927a, as P. brodiaei, CANA 4097). New records. St. Roch Basin: Spence Bay 74-259-17, Peel Inlet 8980. Rasmussen Basin: 74-262-4. Simpson Strait: Eta Island 9004. Queen Maud Gulf: Royal Geographical Society Islands 8633, Anderson Bay 8192, 8417, Foggy Bay 8068, near Minto Islands 7963. Dease Strait: Qikirtaarjuk Islands 7098. Coronation Gulf: Anchor Island 6975. Dolphin and Union Strait: Cockburn Point 8560. Amundsen Gulf: Sachs Harbour 3355, Pearce Point 4462, Gillet Bay 6792, Police Point 6648. Mackenzie _ Bay: 60-1016-17. Northwestern distribution. Literature records. Crozier Channel: Manson Point and Mould Bay (Lee 1966, as P. brodiaei). New records. Norwegian Bay: near Lands End 9543. Queens Channel: Milne Island 9092. Barrow Strait: Allison Inlet 9367. McDougall Sound: Freemans Cove 9308. Austin Channel: Hooker Bay 9338. Byam Channel: near Consett Head DH6-1, near Robertson Point DH15-3. Viscount Melville Sound: near Little Point DH2S9-9, DH9S1-1. Kellett Strait: near Pedder Point 3088.2. Crozier Channel: Manson Point 3730. Beaufort Sea: Cape Prince Alfred 3067. 7. Peterson Bay Herschel Island Ceratocolax hartzii Rosenvinge Rosenvinge 1898, p. 34, figs. 7-9; Zinova 1955, p. 135, fig. 122; Taylor 1957, p. 259; Lund. 1959. p. 215. Parasitic growth on Phyllophora truncata Order Rhodymeniales at the 2-25 m depth. Frequent. Family Rhodymeniaceae Eastern distribution. Literature records. Halosaccion ramentaceum (Linnaeus) J. Smith Sound: Pim Island and Fram Haven (Rosenvinge 1926). Jones Sound: Goose Fjord (Rosenvinge 1926). Hell Gate: Lands End and ‘Reindeer Bay” (Rosenvinge 1926). Hudson Strait: False River Bay and Koksoak River (Wilce 1959). New records. Hall Basin: Discovery Harbour 9679. Kane Basin: Copes Bay 9699, Northern Pim Island 9674. Prince Regent Inlet: Creswell Bay 8884. Gulf of Boothia: Victoria Harbour 8793, Netsiksiuvik Inlet 8725. Davis Strait: Frobisher Bay CANA 16987. Repulse Bay: Talun Bay 74-255B-8. Hudson Bay: Rankin Inlet 74-252A-6, Eskimo Point 74-250-9, Churchill CANA 7330. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a, CANA 4095). New records. St. Roch Basin: Spence Bay 74-259-2, Peel Inlet 8987. Rasmussen Basin: Peterson Bay 74-262-5. Simpson Strait: Eta Island 9005. Queen Maud Gulf: Royal Geographical Society Islands 8621, Anderson Bay 8193, Foggy Bay 8066, near Minto Islands 7964. Dease Strait: Qikirtaarjuk Islands 7707. Dolphin and Union Strait: Bernard Har- bour CANA 7327, Cockburn Point 8561, Cape Young CANA 7332. Amundsen Gulf: Sachs Harbour 3359, Pearce Point 4469, Police Point 6649. Mackenzie Bay: Herschel Island 60-1016-2. Northwestern distribution. New records. Norwegian Bay: near Lands End 9544. Queens Channel: Milne Island 9093. Barrow Strait: Allison Inlet 9364. McDougall Sound: Freemans Cove 9370. Austin Channel: Hooker Bay 9342. Byam Channel: near Consett Head DH6-2. Crozier Channel: Manson Point 3730.1. Agardh Kjellman 1883, p. 153, pl. 12, fig. 4, pl. 13; Rosenvinge 1893, p. 825; 1898, p. 43; Zinova 1955, p. 151, figs. 132-133; Taylor 1957, p. 284; Lund 1959, p. 216. Loose-lying and attached to rocks at depths of 3-30 m. Frequent. Eastern distribution. Literature records. Smith Sound: Pim Island and Rice Strait (Rosenvinge 1926), 78-82° N. (Ash- mead 1864, as Soliera chordalis*). Jones Sound: Craig Harbour (Lund 1933), Cape Vera (Rosenvinge 1926). Fram Sound: Norfolk Inlet (Rosenvinge 1926). Hell Gate: ‘‘Excrement Bay” or Cross Bay, ‘Hare Point’, and Lands End (Rosenvinge 1926). Davis Strait: Cumberland Sound (Dickie 1867, also as Halosaccion dumontioi- des; Farlow 1879, as Phyllophora membranifolia according to his 1886 paper), Pangnirtung (Wheldon 1947). Hudson Strait: Ungava Bay (Wilce 1959), Wakeham Bay (Bell and MacFarlane 1938), Hudson Strait (Bell and Mac- Farlane 1933). New records. Hall Basin: Distant Cape 9659. Kane Basin: northern Pim Island 9562, 9576. Jones Sound: Cape Skogn 9798, Boat Point 9775. Fram Sound: Rodberg Bay 9786. Prince Regent Inlet: Creswell Bay 8892. Bellot Strait: Fox Islands 8879. Gulf of Boothia: Netsiksiuvik Inlet 8736. Eclipse Sound: near Pond Inlet 2697. Davis Strait: Frobisher Bay CANA 16973. Hudson Strait: Westbourne Bay 2462.7, Ashe Inlet CANA 5810, Negus Bay 2573, Wakeham Bay 2639.7. Repulse Bay: Talun Bay 74-256-6. Southwestern distribution. * Farlow (1882) had stated that this could actually have been Cystoclonium purpurascens, in which event it would be the only Canadian Arctic record for that species. Kjell- man (1883) later noted that it could also have been Halo- saccion ramentaceum. New records. Rasmussen 74-262C-8. Simpson Strait: Eta Island 8683, 9047. Amundsen Gulf: Sachs Harbour 3365, Booth Island 6544. Northwestern distribution. Literature records. Penny Strait: Northumberland Sound (Harvey 1858, as H. dumontioides). Queens Channel: Queens Channel (Harvey 1858). Crozier Channel: Mould Bay (Lee 1966). New records. Norwegian Bay: near Lands End 9547. Penny Strait: near Russell Island 9744, Hungry Bay 62-4304-2. Queens Channel: near Cape Becher 9758, Milne Island 9099. Wellington Channel: Snowblind Bay O753. Barrow Strait: near Cape Dungeness 9522, Assistance Bay 62-4007-3. McDougall Sound: Templeton Bay 9104, Brooman Point 9254. Byam Channel: Robertson DH7-14. Crozier Channel: Manson Point 3737. Beaufort Sea: Cape Prince Alfred 3062.1. Basin: Peterson’ Bay Point Rhodymenia palmata (Linnaeus) Greville Kjellman 1883, p. 147; Rosenvinge 1893, p. 809: 1898, p. 28; Zinova 1955, p. 143, figs. 125-130; Taylor 1957, p. 285, pl. 41, fig. 7, pl. 42, fig. 3; Lund 1959, p. 217. At depths of 2-15 mon rocks and at times on Laminaria longicruris (stipe), and Fucus distichus. Occasional. Eastern distribution. Literature records. Jones Sound: Craig Harbour (Lund 1933). Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938). Davis Strait: Cumberland Sound (Dickie 1867). Hudson Strait: Ungava Bay (Farlow 1886, Wilce 1959), Forbes Sound (Wheldon 1947), Hudson Strait (Bell and Mac- Farlane 1933), Wakeham Bay (Bell and MacFarlane 1933). Hudson Bay: Hudson Bay (Bell and MacFarlane 1933). James Bay: James Bay (Setchell and Collins 1908), Grey Goose Island (Howe 1927, CANA 4169), Chariton Island (Howe 1927, CANA 4209; Bell and MacFarlane 1938). New records. Jones Sound: Cape Skogn 9208. Adams Sound: Arctic Bay 2745. Prince Regent Inlet: Creswell Bay 8897. Eclipse Sound: near Pond Inlet 2687. Davis Strait: Frobisher Bay CANA 16954. Hudson Strait: Westbourne Bay 2472, Negus Bay 2547. Repulse Bay: Talun Bay 74-256-8. Hudson Bay: Ivugivik Harbour 2586, Churchill Crum 7622. Southwestern distribution. New records. Simpson Strait: Eta Island 8665, 8998. Victoria Strait: Victory Point 8956. Queen Maud Gulf: Royal Geographical Society Islands 8678. Northwestern distribution. Literature records. Penny Strait: Northumberland Sound (Harvey 1858). New records. Queens Channel: near Cape Becher 9767. Wellington Channel: 9750. Barrow Strait: Cunningham Inlet 9767. Snowblind Bay Order Ceramiales Family Ceramiaceae Antithamnion americanum (Harvey) Farlow Kjellman 1883, p. 184; Zinova 1955, p. 162; Taylor 1957, p. 294. On rocks at the 3-8 m depth. Rare. Eastern distribution. Literature records. Bellot Strait: Port Kennedy (Dickie 1861, as Callithamnium americanum). Davis Strait: Cumberland Sound (Dickie 1867, as C. americanum). Hudson Strait: Ungava Bay (Farlow 1886, as C. americanum). New records. Davis Strait: Frobisher Bay CANA 13962. Hudson Strait: Westbourne Bay 2525. Antithamnion boreale (Gobi) Kjellman Kjellman 1883, p. 180, pl. 16, figs. 2-5; Rosenvinge 1893, p. 787, as A. p/umula var. boreali; 1898, p. 21, as A. plumula var. boreale; Zinova 1955, p. 158, fig. 136; Taylor 1957, p. 293; Lund 1959, p. 218. At the 2-15 m depth on rocks, hydroids (Abjetinaria), and various other algae: Chae- tomorpha melagonium, Sphacelaria arctica, S. plumosa, Laminaria solidungula (hold- fast), Fucus distichus, Ahnfeltia_ plicata, 61 Phyllophora truncata, Rhodymenia palmata, and Phycodrys rubens. Frequent in the southwest, occasional elsewhere. Eastern distribution. Literature records. Smith Sound: Pim Island (Rosenvinge 1926). Jones Sound: Goose Fjord (Rosenvinge 1926). Hudson Strait: Ungava Bay (Farlow 1886, as Callithamnion boreale), Hudson Strait (Bell and MacFarlane 1933, as Antithamnion § cruciatum, probably). Hudson Bay: Richmond Gulf and be- tween Otaska Harbour and Black Whale Harbour (Howe 1927, CANA 4161 and 4763). James Bay: Grey Goose Island (Howe 1927, CANA 4165), James Bay (Set- chell and Collins 1908). New records. Prince Regent 8897. Hudson Strait: Wakeham Bay 2664.2. Hudson Bay: Eskimo Point 74-250-17. Southwestern distribution. Literature records. Dolphin and Union Strait: Cape Young (Collins 1927a, CANA 4047). New records. Rasmussen 74-262B-5. Simpson Strait: Eta Island 8674, 9037. Queen Maud Gulf: Foggy Bay 8742, near Minto Islands 7962. Dease Strait: Qikirtaarjuk Islands 7736, Wellington Bay 62-7300-7. Melville Sound: Kuururjuak Point 8397, Hurd Islands 8357. Bathurst Inlet: Buchan Bay 8530. Prince of Wales Strait: Berkeley Point 9485. Amundsen Gulf: Prince Albert Sound 9471, Pearce Point 4467, Gillet Bay 6717, Police Point 4370, 6667, Booth Island 6554. Northwestern distribution. New records. Queens Channel: Milne Island 9097. Barrow Strait: Allison Inlet 9377. McDougall Sound: Brooman Point 9266. Byam Channel: near Robertson Point DH7, DH15-7, near Kay Point DH25-2. Viscount Melville Sound: near Little Point DH257-9. Inlet: Creswell Bay Basin: Peterson’ Bay 62 Antithamnion pylaisaei (Montagne) Kjellman Kjellman 1883, p. 179, pl. 16, fig. 1; Rosen- vinge 1893, p. 788, as A. plumula var. pylaisaei; Zinova 1955, p. 160, fig. 137; Taylor 1957, p. 295. On intertidal Fucus distichus at Rankin Inlet, on rocks at the 3-8 m depth at Negus Bay. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Farlow 1879, as Callithamnion pylaisaei). Hudson Strait: Ungava Bay (Farlow 1886, as C. pylaisaei). New records. Hudson Strait: Negus Bay 2570. Hudson Bay: Rankin Inlet 74-253A-7. Ceramium rubrum (Hudson) C. Agardh Kjellman 1883, p. 170, pl. 15, fig. 7; Rosen- vinge 1893, p. 786; Zinova 1955, p. 167, fig. 142; Taylor 1957, p. 315, pl. 47, fig. tapes figs. 6-7. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Farlow 1879). Ceramium tenuissimum (Roth) J. Agardh Zinova 1955, p. 164, fig. 138. “Found on beach’. Southwestern distribution. Literature records. Dolphin and Union Strait: Cape Young (Collins 1927a, CANA 4040). Ptilota pectinata (Gunnerus) Kjellman Kjellman 1883, p. 174, pl. 15, figs. 1-6; Rosenvinge 1893, p. 790; 1898, p. 22; Zinova 1955, p. 175, fig. 146; Taylor 1957, p. 306, pl. 52, fig. 1, as P. serrata; Lund 1959, p. 220. On rocks at the 3-8 m depth in Westbourne Bay and Negus Bay. Also on Phyllophora truncata dredged from a depth of 22-27 min Frobisher Bay. Rare. Eastern distribution. Literature records. Jones Sound: Cape Vera (Rosenvinge 1926). Davis Strait: Cumberland Sound (Dickie 1867, as P. serrata; Farlow 1879, as P. plumosa var. serrata). Hudson Strait: Ungava Bay (Farlow 1886; Wilce 1959, as P. serrata), Wakeham Bay (Collins 1927b), Cape Wolsten- holme (Bell and MacFarlane 1938), Hudson Strait (Bell and MacFarlane 1933). Hudson Bay: Depot Island (Setchell and Collins 1908), Hudson Bay (Bell and MacFarlane 1938). James Bay: James Bay (Setchell and Collins 1908). New records. Davis Strait: Frobisher Bay CANA 16980. Hudson Strait: Westbourne Bay 2503, Ashe Inlet CANA 6609, Negus Bay 2567. Ptilota plumosa (Hudson) C. Agardh Kjellman 1883, p. 173; Rosenvinge 1893, p. 790; Zinova 1955, p. 172, figs. 144-145; Taylor 1957, p. 307. On rocks at the 3-6 m depth. Rare. Eastern distribution. Literature records. Hudson Strait: Forbes Sound (Wilce 1959). New records. Jones Sound: Cape Skogn 9214, near Cape Newman Smith 9240. Northwestern distribution. New records. McDougall Sound: near Brooman Point 9265. Family Delesseriaceae Membranoptera alata (Hudson) Stackhouse Kjellman 1883, p. 134, as Delesseria alata; Zinova 1955, p. 179, figs. 147-148; Taylor 1957, p. 321, pl. 53, figs. 4-6. The specimens from Frobisher Bay were on Turnerella pennyi dredged from a depth of 22-27 m. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Farlow 1879, as Delesseria alata). Hudson Strait: Ungava Bay (Farlow 1886), Forbes Sound, False River Bay, and Koksoak River (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933, as D. alata). New records. Davis Strait: Frobisher Bay CANA 16978. Membranoptera___denticulata Kylin Kjellman 1883, p. 135, as Delesseria mon- tagnei; Rosenvinge 1893, p. 802, fig. 12, as D. montagnei; Taylor 1957, p. 322, pl. 53, figs. 7-8. At the 15-25 m depth in Hell Gate. Eastern distribution. (Montagne) Literature records. Hell Gate: ‘‘Reindeer Cove” (Rosen- vinge 1926). Hudson Strait: Ungava Bay (Farlow 1886, as Delesseria montagnei), False River Bay and Koksoak River (Wilce 1959). James Bay: James Bay (Setchell and Collins 1908, as D. denticulata). Pantoneura angustissima (Turner) Kylin Kjellman 1883, p. 134, as De/esseria angus- tissima; Taylor 1957, p. 320; Lamb and Zim- merman 1964, p. 234. Eastern distribution. Literature records. Davis Strait: Koojesse Inlet (Lamb and Zimmerman 1964). Pantoneura baerii (Postels and Ruprecht) Kylin Kjellman 1883, p. 132, pl. 10, fig. 3, as Delesseria baerii and D. corymbosa; Rosen- vinge 1893, p. 806, as D. baerii; Zinova 1955, p. 180, fig. 149; Taylor 1957, p. 320, pl. 44, fig. 6; Lund 1959, p. 220. Within depths of 3 and 10 m on Fucus dis- tichus and Halosaccion ramentaceum. Rare. Eastern distribution. Literature records. Jones Sound: Craig Harbour (Lund 1933), northern Devon Island (Lamb and Zimmerman 1964). Davis Strait: Cumberland Sound (Farlow 1879, as Delesseria rostrata). Hudson Strait: Ungava Bay (Farlow 1886, as D. baerii and D. corymbosa), False River Bay and Koksoak River (Wilce 1959). New records. Hudson Strait! Negus Bay 2598.7, Wakeham Bay 2632. Southwestern distribution. New records. Amundsen Gulf: Sachs Harbour 3366. Phycodrys rubens (Linnaeus) Batters Kjellman 1883, p. 136, as Delesseria sinuosa; Rosenvinge 1893, p. 808; 1898, p. 27, as D. sinuosa; Zinova 1955, p. 185, figs. 154-157, as Phycodrys sinuosa; Taylor 1957, p. 323, pl.'30; fig. 8) pl 42, Tig: 1, pk.46, fig. 1; Lund 1959, p. 221. At depths of 2-25 m on rocks and other algae. The algal hosts were Sphacelaria plu- mosa, Fucus distichus, Callophyllis cristata, Phyllophora’ truncata, and Odonthalia dentata. Occasional. Some plants from the southwestern region were of P. rubens var. lingulata (C. Agardh) Batters. Eastern distribution. Literature records. Smith Sound: Rice Strait (Rosenvinge 1926). Hell Gate: Lands End (Rosenvinge 1926). Eclipse Sound: Pond Inlet (Wheldon 1947). Hudson Strait: Ungava Bay (Farlow 1886, as Delesseria sinuosa), Forbes Sound, False River Bay, and Koksoak River (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933, as D. sinuosa). Hudson Bay: Churchill (Bell and MacFarlane 1938), Richmond Gulf (Howe 1927, as Phycodrys sinuosa, CANA 4250), Hudson Bay (Bell and MacFarlane 1933, as D. sinuosa). James Bay: James Bay (Setchell and Gardner 1908, as D. sinuosa), Old Factory Bay (Howe 1927, as P. sinuosa, CANA 4247), Charlton Island (Howe 1927, as P. sinuosa; Bell and MacFarlane 1938, as D. sinuosa). New records. Robeson Channel: near Cape Rawson 9626. Jones Sound: Cape Skogn 9216. Prince Regent Inlet: Creswell Bay 8893. Gulf of Boothia: Netsiksiuvik Inlet 8738. Hudson Bay: Churchill Crum 7645. Southwestern distribution. Literature records. Dolphin and Union Strait: Bernard Har- bour and Cockburn Point (Collins 1927a, as D. sinuosa, CANA 4082). New records. Rasmussen 74-262B-15. Simpson Strait: Eta Island 8687, 9047. Queen Maud Gulf: Foggy Bay 8774, near Minto Islands 8076. Dease Strait: Qikirtaarjuk Islands 7095. Coronation Gulf: Anchor Island 6977. Dolphin and Union Strait: Cockburn Point 8562. Amundsen Gulf: Gillet Bay 6745, Police Point 6637, Booth Island 6590. Northwestern distribution. New records. Barrow Strait: Allison Inlet 9365. Byam Channel: near Richardson Point DH13-2, near Robertson’ Point DH22-2, near Kay Point DH25-4. Basin: Peterson’ Bay Viscount Melville Sound: near Little Point DH2S9-6. Wilkins Strait, south of: Brock Island 3166. Family Rhodomelaceae Polysiphonia arctica J. Agardh Kjellman 1883, p. 123; Rosenvinge 1893, p. 800; 1898, p. 25; Zinova 1955, p. 194, fig. 160; Taylor 1957, p. 338; Lund 1959, p. 223. At the 2-30 m depth attached to rocks and loose-lying on mud substrates. Also growing on Sphacelaria plumosa, Laminaria haptera, Fucus distichus, and Phyllophora truncata. Frequent. Eastern distribution. Literature records. Smith Sound: Pim Island (Rosenvinge 1926). Jones Sound: Walrus Fjord (Rosenvinge 1926). Hell Gate: ‘Hare Point’, ‘Reindeer Cove”, and Lands End (Rosenvinge 1926). Fram Sound: Norfolk Inlet (Rosenvinge 1926). Baffin Bay: Bethune Bay (Dickie 1871). Davis Strait: Cumberland Sound (Dickie 1867; Farlow 1879, 1886). Hudson Strait: Ungava Bay (Farlow 1886); Forbes Sound, False River Bay, and Koksoak River (Wilce 1959). Hudson Bay: Richmond Gulf (Howe 1927, CANA 4206). James Bay: Grey Goose Island (Howe 1927, CANA 4205). New records. Robeson Channel: near Cape Rawson 9627. Hall Basin: Distant Cape 9657. Kane Basin: Copes Bay 9703, northern Pim Island 9583, 9612. Jones Sound: Cape Skogn 9221, Boat Point 9177. Fram Sound: Rodberg Bay 9790. Bellot Strait: Fox Islands 8838. Hudson Strait: Westbourne Bay 2483, Wakeham Bay 2637. Hudson Bay: Rankin Inlet 74-253A-177, Eskimo Point 74-250-12, Churchill Crum 7649. Southwestern distribution. Literature records. Dolphin and Union Strait: Cockburn Point (Collins 1927a, CANA 4086). New records. Rasmussen 74-262C-11. Simpson Strait: Eta Island 8658, 9042. Queen Maud Gulf: Royal Geographical Society Islands 8632, Foggy Bay 8060, near Minto Islands 8074. Dease Strait: Qikirtaarjuk Islands 7727. Coronation Gulf: Anchor Island 6974. Amundsen Gulf: Sachs Harbour 3340, 4641, Booth Island 6605. Northwestern distribution. Literature records. Crozier Channek. Manson Point and Mould Bay (Lee 1966). New records. Belcher Channel: Cape Ursula 9737. Queens Channel: Milne Island 9098. Wellington Channel: Snowblind Bay Basin: Peterson’ Bay 9144. Barrow Strait: near Cape Dungeness 9520. Austin Channel: near Langley Point 9349. Byam Martin Channel: near Burnett Point DH11S3-17. Byam Channel: near Richardson Point DH13-4, near Robertson’ Point DH7-15, DH15-6, near Kay Point DH5-4, DH25-1. Viscount Melville Sound: Nelson Grif- fiths Point DH8-7, near Little Point DH2S2-2, DH9-2. Hecla and Griper Bay: Cape Fisher 3094.2. Crozier Channel: Manson Point 3734. Beaufort Sea: Cape Prince Alfred 3073.1. Polysiphonia urceolata (Lightfoot) Greville Kjellman 1883, p. 118; Rosenvinge 1893, p. 797; Zinova 1955, p. 190, figs. 158-159; Taylor 1957, p. 337; Lund 1959, p. 223. The Charlton Island specimens were at the 5 m depth. Eastern distribution. Literature records. Eclipse Sound: Pond Inlet (Bell and MacFarlane 1938). Hudson Strait: Forbes Sound and False River Bay (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933). Hudson Bay: Hudson Bay (Bell and Mac- Farlane 1933). James Bay: Charlton Island (Howe 1927, CANA 4208). Northwestern distribution. Literature records. Viscount Melville Sound: Cape Cock- burn (Harvey 1858). Rhodomela confervoides (Hudson) Silva Kjellman 1883, p. 112, pl. 8, as R. subfusca; Waern 1952, p. 225, figs. 94-95, as R. sub- fusca; Zinova 1955, p. 199, figs. 164-165, as R. subfusca; Taylor 1957, p. 344, pl. 40, fig. 9. On rocks at the 4-8 m depth. Rare. Eastern distribution. Literature records. Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879; both as Rhodo- mela subfusca). Hudson Strait: Ungava Bay (Wilce 1959), Wakeham Bay (Bell and MacFarlane 1938, as R. subfusca), Hudson Strait (Bell and MacFarlane 1933, as AR. sub- fusca). Hudson Bay: Hudson Bay (Bell and Mac- Farlane 1933, as R. subfusca). New records. Hudson Strait: Westbourne Bay 2577.2. Rhodomela Agardh Kjellman 1883, p. 107, pl. 9, pl. 10, figs. 1-2; Rosenvinge 1893, p. 796; 1898, p. 24, fig. 4; Zinova 1955, p. 201, figs. 166-167; Taylor 1957, p. 344; Lund 1959, p. 226. At depths of 2-35 m on rocks, less com- monly on other algae, such as Sphacelaria plumosa, Laminaria solidungula (holdfast), Fucus distichus, and Phyllophora truncata. Also loose-lying on mud substrates. Fre- quent. Besides R. /ycopodioides f. lycopo- dioides, including the associated subf. tenera Kjellman, also present was A. lycopo- dioides f. flagellaris Kjellman. Eastern distribution. Literature records. Jones Sound: Craig Harbour (Lund 1933). Baffin Bay: Bethune Bay (Dickie 1871). Davis Strait: Cumberland Sound (Farlow 1879, as Rhodomela tenuissima). Hudson Strait: Ungava Bay (Farlow 1886, as R. lycopodioides var. tenuissima), Forbes Sound, False River Bay, and Koksoak River (Wilce 1959, as R. /yco- podioides f. flagellaris). Hudson Bay: between Otaska Harbour and Black Whale Harbour (Howe 1927, CANA 4171). James Bay: James Bay (Setchell and Collins 1908, as R. lycopodioides f. lycopodioides (Linnaeus) C. 65 tenuissima and R. lycopodioides f. flagellaris), Grey Goose Island and Charlton Island (Howe 1927, CANA 4167 and 4166). New records. Jones Sound: Cape Skogn 9220. Prince Regent Inlet: Creswell Bay 8873. Eclipse Sound: near Pond Inlet 2679. Hudson Strait: Wakeham Bay 2635. Hudson Bay: Rankin Inlet 74-253A-6, Eskimo Point 74-250-18. James Bay: Swan River CANA 4804. Southwestern distribution. Literature records. Dolphin and Union Strait: ‘“Kimiryuak River’ in Simpson Bay (Collins 1927a, CANA 4039). New records. St. Roch Basin: Peel Inlet 8987. Rasmussen’ Basin: Peterson 74-262B-8. Simpson Strait: Eta Island 8660, 9045. Queen Maud Gulf: Royal Geographical Society Islands 8605, Enterprise Point 7906, Anderson Bay 8228, 8462, Foggy Bay 8145, near Minto Islands 8078. Dease Strait: Starvation Cove 7263, Qikirtaarjuk Islands 7148. Melville Sound: Hurd Islands 8364. Bathurst Inlet: Cape Croker 8493, Buchan Bay 8537. Coronation Gulf: Anchor Island 6997. Dolphin and Union Strait: Cockburn Point 8557. Amundsen Gulf: De Salis Bay 4565, Sachs Harbour 3354.7, Duck Hawk Bluff 4622, Pearce Point 4435, Gillet Bay 6800, Police Point 4239, 6664, Booth Island 6622. Northwestern distribution. Literature records. Crozier Channel: Mould Bay (Lee 1966). New records. Barrow Strait: near Cape Dungeness 9521, Assistance Bay 9507, Allison Inlet 9370. McDougall Sound: Brooman Point 9260. Byam Channel: near Robertson Point DH7, DH15-8. Viscount Melville Sound: near Little Point DH2S7-10, DH2S9-13. Hecla and Griper Bay: Cape Fisher 3102.2. Kellett Strait: near Pedder Point 3086. Crozier Channel: Manson Point 3146. Beaufort Sea: Cape Prince Alfred 3075.5. Bay Odonthalia dentata (Linnaeus) Lyngbye Kjellman 1883, p. 105; Zinova 1955, p. 203, figs. 168-169; Taylor 1957, p. 346, pl. 60, figs. 4-6. At 15 m to shallower depths on rocks. Also loose-lying on mud substrates. Occasional. Eastern distribution. Literature records". Jones Sound: Cape Vera (Rosenvinge 1926). Davis Strait: Cumberland Sound (Dickie 1867, Farlow 1879). Hudson Strait: Ungava Bay (Farlow 1886), Forbes Sound, False River Bay, and Koksoak River (Wilce 1959), Hudson Strait (Bell and MacFarlane 1933). Hudson Bay: Depot Island (Setchell and Collins 1908), between Otaska Har- bour and Black Whale Harbour (Howe 1927, CANA 4210), Hudson Bay (Bell and MacFarlane 1933). James Bay: Grey Goose Island (Howe 1927, CANA 4212; Bell and MacFarlane 1938). New records. Jones Sound: Cape Skogn 9206. Prince Regent Inlet: Creswell Bay 8864. Bellot Strait: Fox Islands 8856. Hudson Bay: Eskimo Point 74-250-29, Churchill Crum 7642. James Bay: Swan River CANA 4805. Southwestern distribution. New records. St. Roch Basin: Peel Inlet 8972. Rasmussen Basin: Peterson 74-262C-7. Simpson Strait: Eta Island 9027. Victoria Strait: Victory Point 8958. Queen Maud Gulf: Royal Geographical Society Islands 8622, Foggy Bay 8087, near Minto Islands 7956. Dolphin and Union Strait: Cockburn Point 8552. Amundsen Gulf: Pearce Point 4479, Gillet Bay 6744, Police Point 4347, Booth Island 6528. Northwestern distribution. New records. Byam Channel: near Robertson Point DH22-1. Viscount Melville Sound: Nelson Grif- fiths Point DH8-5. Beaufort Sea: Cape Prince Alfred 3065. Bay * CANA 4194 from Hudson Bay (between Otaska and Black Whale Harbours) identified by Howe (1927) as Odonthalia floccosa appears to be Rhodomela lycopo- dioides. Collection Locations As in the species distribution records, the locations below are in a general north to south and east to west arrangement within each region. Positions of latitude and longi- tude related to the present survey approxi- mate the site of collection within each loca- tion as much as possible. The place names are according to the 1968 editions of Vol- umes 2 and 3 of the Arctic Pilot of Canada and current hydrographic chart publications of the Canadian Hydrographic Service. Eastern region. Robeson Channel: Cape Sheridan. Northwestern entrance point of Robeson Channel, Ellesmere Island; 82° 28’ N. 61° 26’ W. Floeberg Beach. About 4 km southeast- ward of Cape Sheridan, Ellesmere Island; 82° 26’ N. 61° 25’ W. Cape Rawson. About 6.5 km southeast- ward of Cape Sheridan, Ellesmere Is- land. The collection site was midway between Cape Rawson and Black Cape; 82° 24’ N. 61° 10’ W. Present survey. Hall Basin: Distant Cape. Northern entrance to Lady Franklin Bay, Ellesmere Island; 81° 43’ N. 64° 30’ W. Present survey. Discovery Harbour. In Lady Franklin Bay, westward of Distant Cape, Ellesmere Island; 81° 43.5’ N. 64° 47’ W. Present Survey. Kennedy Channel: Rawlings Bay. In the southern part of Kennedy Channel, Ellesmere Island; 80° 16’ N. 70° 12’ W. Kane Basin: Norman Lockyer Island. A small island at the mouth of Franklin Pierce Bay, Elles- mere Island; 79° 23.4’ N. 74° 46’ W. Pres- ent survey. Copes Bay. Northwestern arm of Princess Marie Bay, Ellesmere Island; 79° 26’ N. 76° 10’ W. Present survey. Hayes Fjord. Large western arm of Bu- chanan Bay, Ellesmere Island; 78° 58’ N. i. 10’ WW. Alexandra Fjord. At the south side of Buchanan Bay, Ellesmere Island; 78° 55’ N. 76° 00’ W. Pim Island. Between Kane Basin and Smith Sound opposite Johan Peninsula, Ellesmere Island; 78° 44’ N. 74° 25’ W. Present survey. Smith Sound: Rice Strait. Narrow passage separating Pim Island from Ellesmere Island; 78° 45’ N. 74° 46’ W. Fram Haven. Small bay in Rice Strait, Ellesmere Island; 78° 47’ N. 74° 46’ W. Jones Sound: Craig Harbour. At the tip of a prominent peninsula near the entrance to Jones Sound, Ellesmere Island. 76° 11’ N. 81° 02’ W. Fram Fjord. A small inlet between Craig Harbour and Starnes Fjord, Ellesmere Island; 76° 29’ N. 81° 15’ W. Harbour Fjord. Between Lindstrom Pen- insula and Heim Peninsula, Ellesmere Island; 76° 33’ N. 84° 14’ W. Muskox Fjord. In the western part of Jones Sound, Ellesmere Island; 76° 31’ N. 87° 41’ W. Goose Fjord. A deep inlet in the western part of Jones Sound, Ellesmere Island; 76° 35’ N.. 88° 36’ W. Walrus Fjord. A large inlet just west of Goose Fjord, Ellesmere Island; 76° 30’ N. 88° 50’ W. Bay of Woe. At the northwestern entrance to Jones Sound, Ellesmere Island; 76° 27’ N. 89° 07’ W. Cape Skogn. Near the eastern extremity of Bear Bay, Devon Island; 75° 46’ N. 84° 13’ W. Present survey. Cape Newman Smith. Eastern side of Bear Bay. The collection was made south of the western entrance of an unnamed bay with Cape Newman Smith forming the eastern entrance, Devon Island; 75° 35’ N. 85° 33’ W. Present survey. West Fjord. Large inlet at the western face of Jones Sound, Devon Island; 76° 05’ N. 90° 00’ W. Boat Point. The southern entrance point to West Fjord, Devon Island; 76° 00.8’ N. 90° 04’ W. Present survey. Cape Vera. Eastern tip of Colin Archer Peninsula, Devon Island; 76° 13’ N. 89° 14’ W. Fram Sound: Rodberg Bay. A large bay indentating the southeastern face of North Kent Island; 76° 29.5’ N. 89° 51’ W. Present survey. Norfolk Inlet. The northwestern arm of 67 Fram Sound, Devon Island; 76° 29’ N. 91° 00’ W. Hell Gate: Cross Bay. At the southeast side of Hell Gate, Ellesmere Island; 76° 33’ N. 89g” 32" W. Lands End. The northeastern entrance point to Hell Gate, Ellesmere Island; 76° 51” N. 89° 30’ W. Cardigan Strait: Devil Island. A small island in the south- western part of the strait; 76° 30’ N. 90° 30’ W. Lancaster Sound: Dundas Harbour. Near the northeastern entrance to the sound, Devon Island; 74° 32’ N. 82° 27’ W. Adams Sound: Arctic Bay. On the north shore of the sound, Baffin Island; 73° 01’ N. 85° 09’ W. Present survey. Prince Regent Inlet: Creswell Bay. Large bay on the west side of the inlet, Somerset Island; 72° 43.5’ N. 93° 48’ W. Present survey. Bellot Strait: Port Kennedy. A narrow inlet at the north- eastern side of the strait, Somerset Island. 72° 02’ N. 94° 19’ W. Fox Islands. In the eastern portion of the strait. The collection was made on the larger island; 72° 43.5’ N. 93° 48’ W. Present survey. Brands Island. At the southeastern en- trance to the strait. The collection was made in the inlet across the island on Boothia Peninsula; 71° 58.9’ N. 94° 27.4’ W. Present survey. Gulf of Boothia: Victoria Harbour. West side of the gulf on the Boothia Peninsula; 70° 09’ N. 91° 33’ W. Present survey. Netsiksiuvik Inlet. West side of the gulf in Lord Mayor Bay, Boothia Peninsula; 69° 42.5’ N. 92° 45’ W. Present survey. St. Peter Bay. East side of Pelly Bay on the Simpson Peninsula; 68° 32*°N. 89° 51’ W. Present survey. Eclipse Sound: Pond Inlet settlement. At the. southeast- ern entrance point to the inlet. Collec- tions were made at the settlement and west of it; 72° 42’ N. 77° 51’ W. Present Survey. Baffin Bay: Bethune Inlet. Between Philpots Island and Devon Island; 74° 52’ N. 80° 20’ W. Cape Bowen. Southeastward of Pond Inlet, Baffin Island; 72° 34’ N. 75° 31’ W. Cape Adair. Southwestern part of the bay, Baffin Island; 71° 24’ N. 71° 13’ W. Clyde Inlet. Southwestern corner of the bay, Baffin Island; 70° 27’ N. 68° 33’ W. Davis Strait: Exeter Sound: At the easternmost extremi- ty of Baffin Island; 66° 12’ N. 62° 00’ W. Cumberland Sound. The largest inlet on the west coast of Baffin Island; 65° 20’ N. 66° 00’ W. Pangnirtung. Settlement on the northeast- ern side of Cumberland Sound; 66° 08’ N. 65° 44’ W. Frobisher Bay. Large bay at the southeast- ern part of Baffin Island; 62° 40’ N. 66° 20’ W. Koojesse Inlet. At the head of Frobisher Bay; 63° 44’ N. 68° 32’ W. Hudson Strait: Resolution Island. At the northeastern en- trance to the strait;61° 33’ N. 65° 00’ W. Port Harvey. Part of the channel that sepa- rates Bush Island from Killinek Island at the southeastern entrance to the strait; 60° 28.7’ N. 64° 42’ W. Ungava Bay. Extensive bay at the eastern entrance of the strait; 60° 00’ N. 67° 10’ W. Forbes Sound. Northeastern part of Un- gava Bay between Killinek Island and the mainland; 60° 23’ N. 64° 50’ W. False River. At the southern part of Un- gava Bay; 58° 30’ N. 67° 50’ W. Koksoak River. At the southern part of Ungava Bay west of False River; 58° 34’ N. 68° 09’ W. Westbourne Bay. At the northern side of the strait in North Bay; 62° 49’ N. 69° 50’ W. Present survey. Ashe Inlet. At the south shore of Big Is- land, north side of the strait; 62° 32’ N. 70° 34’ W. Negus Bay. At the northwestern part of the strait; 64° 17’ N. 72° 22’ W. Present Survey. Wakeham Bay. At the southern side of the Strait; 61° 39’ N. 72° 00’ W. Present survey. Deception Bay. At the southwestern side of the strait; 62° 11’ N. 74° 45’ W. Sugluk Inlet. At the southwestern side of the strait; 62° 12.5’ N. 75° 39’ W. Present Survey. Cape Wolstenholme. The southwestern entrance point to the strait; 62° 36’ N. 31" W. Foxe Channel: Stanley Harbour. At the northeastern coast of Southampton Island; 64° 42’ N. 82° 12’ W. Present survey. Repulse Bay: Talun Bay. At the northern shore of the bay, Melville Peninsula; 66° 31’ N. 86° 14’ W. Present survey. Hudson Bay: Southampton Island. Large island _ be- tween Foxe Basin and Hudson Bay; 64° 30’ N. 84° 00’ W. South Bay. At the south shore of South- ampton Island; 62° 54’ N. 83° 24’ W. Munn Bay. At the head of South Bay, Southampton Island; 64° 06’ N. 83° 17’ W. Present survey. lvugivik Harbour. Close to the northeast- ern entrance point-of the bay; 62° 25.5’ N. 77° 54.8’ W. Present survey. Richmond Gulf. At the eastern side of the bay; 56° 14’ N. 76° 15’ W. Great Whale River. At the southeastern region of the bay; 55° 15’ N. 77° 45’ W. Otaska Harbour. At the southeastern re- gion of the bay; 55° 04’ N. 78° 16’ W. Long Island Sound. Between Long Island and the mainland, near the eastern en- trance to James Bay; 54° 48’ N. 79° 23’ W Depot Island. At the northwestern corner of the bay; 63° 48’ N. 89° 52’ W. Chesterfield Inlet. A settlement at the northwestern side of the bay; 63° 20’ N. 90° 43’ W. Rankin Inlet. At the northwestern side of the bay; 62° 46’ N. 90° 17’ W. Present survey. Eskimo Point. At the northwestern side of the bay; 61° 06’ N. 94° 02’ W. Present Survey. Churchill. A settlement at the mouth of Churchill River at the western side of the bay; 58° 46’ N. 94° 04’ W. James Bay: Grey Goose Island. In the northeastern re- gion of the bay; 53° 55’ N. 79° 54’ W. Old Factory Bay. At the eastern side of the bay; 52° 36’ N. 78° 45’ W. Charlton Island. Large island in the south- ern part of the bay; 52° 00’ N. 79° 28’ W. Moose River. In the southern portion of the bay;51° 20° 'N. 80° 25”W. Swan River. At the western side of the bay; 53° 36’ N. 82° 14’ W. Ekwan River. At the western side of the bay opposite Akimiski Island; 53° 12’ N. 82° 13’ W. Present survey. Halfway Point. At the southwestern side of the bay; 51° 52’ N. 80° 49’ W. Southwestern region. St. Roch Basin: Spence Bay. On the Boothia Peninsula; 69° 31’ N. 93° 34’ W. Present survey. Peel Inlet. On King William Island; 69° 13’ N. 96° 09’ W. Present survey. Rasmussen Basin: Peterson Bay. On King William Island; 68° 37; N. 95° 53’ W. Present survey. Simpson Strait: Eta Island. Large island in the narrow por- tion of the strait; 68° 32.4’ N. 97° 23.2’ W. Present survey. M’Clintock Bay. On King William Island; 67° 39.3’ N. 97° 44.7’ W. Present survey. Victoria Strait: Victory Point. Northern extremity of Back Bay, King William Island; 69° 38.5’ N. 98° 22’ W. Present survey. Cape Jane Franklin. In Back Bay, King William Island; 69° 37’ N. 98° 22’ W. Present survey. Franklin Point. Southern extremity of Back Bay, leading into Collinson Inlet, King William Island. 69° 34.5’ N. 98° 33’ W. Present survey. Queen Maud Gulf: Royal Geographical Society Islands. A col- lection was made on the largest island of the group, which lies in the southern entrance to Victoria Strait; 68° 42’ N. 100° 23’ W. Present survey. Enterprise Point. The western entrance to Parker Bay, Victoria Island; 68° 47’ N. 103° 18’ W. Present survey. Anderson Bay. On Victoria Island; 68° 56’ N. 104° 22’ W. Present survey. Foggy Bay. South of Melbourne Island on the southwestern portion of the gulf; 68° 19’ N. 104° 47.5’ W. Present survey. Minto Islands. In the southwestern part of the gulf. The collection was made oppo- site the Minto Islands between the Beaufort River and Cape Roxborough; Go «G0-6 °N: 105°" 25:5’ oW. ‘Present Survey. Dease Strait: Starvation Cove. On Victoria Island in the eastern portion of the strait; 69° 09.3’ N. 106° 00’ W. Present survey. Qikirtaarjuk Islands. In the Finlayson Is- lands, eastern section of the strait; 68° 58.9’ N. 105° 49.9’ W. Present survey. Duncan Island. In the Finlayson Islands. The collection was made on an un- named island east of Duncan Island; 69° 06.7’ N. 105° 54’ W. Present survey. Wellington Bay. Large bay on Victoria Is- land in the eastern portion of the strait; 69° 18’ N. 106° 30’ W. Elu Inlet: Unnamed island. An island in the south- eastern corner of the inlet; 68° 30’ N. 105° 43’ W. Present survey. Melville Sound: Kuururjuak Point. The tip of the peninsula between Warrender Bay and Elu Island; 68° 17.5’ N. 106° 31’ W. Present survey. Hurd Islands. The collection was made on the largest island; 68° 12.3’ N. 107° 16’ W. Present survey. Bathurst Inlet: Cape Croker. At the northeastern entrance to the inlet; 68° 06.4’ N. 107° 50.3’ W. Present survey. Buchan Bay. Southward of Cape Croker; 67° 56.3’ N. 107° 41.8 W. Present Survey. Detention Harbour. Southward of the north- western entrance to the inlet; 67° 51’ N. 109° 56’ W. Coronation Gulf: Anchor Island. In the Duke of York Archi- pelago; 68° 09’ N. 112° 47’ W. Present survey. Dolphin and Union Strait: Austin Bay. Close to the eastern entrance 70 of the strait at Lady Franklin Point, Vic- toria Island; 68° 32’ N. 113° 10’ W. Simpson Bay. A wide bay on the Victoria Island coast; 69° 05’ N. 114° 10’ W. Bernard Harbour. On the southeastern shore of the strait; 68° 44.7’ N. 114° 42.5’ W. Present survey. Cockburn Point. West of Bernard Harbour; 68° 52.7’ N. 115° 02.5’ W. Present Survey. Stapylton Bay. About midway along the south shore of the strait; 68° 53’ N. 116° 10’ W. Cape Young. West of Stapylton Bay; 68° 57” N. 11700 Wi Prince of Wales Strait: Princess Royal Islands. About midway in the strait; 72° 45.6’ N. 118° 06.5’ W. Present survey. Berkeley Point. The southeastern entrance point of the strait, Victoria Island; 71° 35’ N. 118° 51’ W. Present survey. Amundsen Gulf: Cape Ptarmigan. Western point of the pen- insula between Minto Inlet and Prince Albert Sound, Victoria Island; 71° 00’ N. 118° 22’ W. Present survey. Prince Albert Sound. A large sound on Victoria Island; 70° 32’ N. 116° 38’ W. Present survey. De Salis Bay. On the southeastern shore of Banks Island; 71° 26’ N. 121° 36’ W. Present survey. Thesiger Bay. The shallow indentation of the southwestern coast of Banks Island; 71° 59’ N. 125° 05’ W. Present survey. Sachs Harbour. At the southwestern part of Banks Island; 71° 58’ N. 125° 08’ W. Present Survey. Duck Hawk Bluff. About 5 km west of Sachs Harbour; 71° 57.5’ N. 125° 34’ W. Present survey. Cape Kellett. Low spit at the southwest part of Banks Island; 71° 58’ N. 126° 00’ W. Pearce Point. At the south shore of the gulf; 69° 49’ N. 122° 44.6’ W. Present Survey. Gillet Bay. At the south shore of the gulf in the Parry Peninsula; 70° 10.9’ N. 124° 30.3’ W. Present survey. Police Point. At the south shore of the gulf on the Parry Peninsula; 70° 10.9’ N. 124° 45.3’ W. Present survey. Booth Island. West of Police Point in Franklin Bay; 70° 07.7’ N. 125° 08.4’ W. Present survey. Point Stivens. On the Parry Peninsula in the southeastern section of Franklin Bay; 69° 35’ N. 125° 30’ W. Kugmallit Bay: Tuktoyaktuk. A settlement in the eastern part of the bay. A collection was made southwest of the harbour; 69° 25.7’ N. 133° 02.9’ W. Present survey. Mackenzie Bay: Herschel Island. In: the northwestern part of the bay; 69° 35’ N. 139° 02’ W. Northwestern region. Lincoln Sea: Cape Hecla. At the northwestern entrance to James Ross Bay, Ellesmere Island, 82° 55.5’ N. 64° 45’ W. Present survey. Alert. In Dumbell Bay at northeastern Ellesmere Island; 82° 30’ N. 62° 20’ W. Mushroom Point. About 6 km east of Alert; 82° 30’ N. 61° 56’ W. Nanson Sound: Cape St. Andrew. The south entrance point to Otto Fjord, Ellesmere Island; 80° 54.6’ N. 89° 24’ W. Present survey. Butter Porridge Point. In the southeast- ern part of the sound on the Schei Peninsula, Axel Heiberg Island. Collec- tions were made west of the point; 80° 25’ N. 87° 48’ W. Present survey. Sverdrup Channel: Expedition Fjord. An eastern arm of Strand Bay, Axel Heiberg Island; 79° 20.5’ N. 92° 08’ W. Present survey. East Fjord. A northern arm of Strand Bay, Axel Heiberg Island; 79° 20.5’ N. 93° 37’ W. Present survey. Norwegian Bay: Lands End. The northeastern entrance to Hell Gate, Ellesmere Island. A collection was made 1 km north of here; 76° 51.5’ N. 89° 30’ W. Present survey. Belcher Channel: Cape Ursula. On the eastern face of Table Island; 77° 11’ N. 95° 12’ W. Present Survey. Penny Strait: Russell Island. In the northeastern portion of the strait. A collection was made op- posite the island on the Grinnell Penin- sula, Devon Island; 76° 54’ N. 96° 55’ W. Present survey. Northumberland Sound: In the northeast- ern part of the strait on the Grinnell Peninsula, Devon Island; 76° 50’ N. 96° 50’ W. Hungry Bay. On the southwest coast of Grinnell Peninsula, Devon Island; 76° 35’ N. 96° 05’ W. Queens Channel: Cape Becher. On the Sheills Peninsula, south coast of Grinnell Peninsula, Devon Island; 76° 14’ N. 95° 20’ W. Pres- ent survey. Milne Island. An island lying between Queens Channel and McDougall Sound: 75° 39’ N. 96° 43’ W. Present survey. Wellington Channel: Porden Point. At the north coast of the channel on Grinnell Peninsula, Devon Island; 76° 16’ N. 93° 40’ W. Present Survey. John Brown Point. About midway of the eastern side of the channel, Devon Island; 75° 35.3’ N. 92° 02’ W. Present Survey. Emery Bay. South of John Brown Point, Devon Island; 75° 13’ N. 92° 32’ W. Pres- ent survey. Snowblind Bay. Directly west of Emery Bay on Cornwallis Island; 75° 13’ N. 93° 30’ W. Present survey. Barrow Strait: Rigby Bay. In the northeastern section of the strait on Devon Island; 74° 33’ N. 89° 58.8’ W. Present survey. Radstock Bay. In the northeastern section of the strait on Devon Island; 74° 41.7’ N. 91° 12’ W. Present survey. Beechey Island. In the northeastern sec- tion of the strait on Devon Island; 74° 44’ N. 91° 55’ W. Erebus Bay. A bay partially formed by Beechey Island at the southwestern part of Devon Island; 74° 43’ N. 91° 47’ W. Union Bay. A bay partially formed by Beechey Island at the southwestern part of Devon Island; 74° 44’ N. 91° 56’ W. Cape Dungeness. Near the entrance to Wellington Channel on Cornwallis Island. A collection was made about 6 km west of the cape; 74° 39’ N. 93° 56’ 71 W. Present survey. Assistance Bay. On the north side of the strait on Cornwallis Island; 74° 39’ N. 94° 19’ W. Present survey. Cunningham Inlet. On the south side of the strait on Somerset Island; 74° 08’ N. 93° 55’ W. Present survey. Intrepid Bay. In Resolute Passage on the southwestern coast of Cornwallis Island; 74° 57’ N. 96° 09’ W. Present survey. Allison Inlet. In Intrepid Passage on Bath- urst Island; 75° 00’ N. 99° 24’ W. Present Survey. McDougall Sound: Templeton Bay. At the southeastern coast of Little Cornwallis Island. A collection was made in a bay 9 km southwest of Templeton Bay; 75° 26’ N. 96° 37’ W. Present survey. Brooman Point. The southern extremity of a long peninsula on Bathurst Island. A collection was made about 13 km north of the point on the western side of the peninsula; 75° 30’ N. 97° 33’ W. Present Survey. Freemans Cove. At the southwestern en- trance to the sound on Bathurst Island; 75° 11.5’ N. 98° 03’ W. Present survey. Austin Channel: Hooker Bay. At the southern entrance to Graham Moore Bay, Bathurst Island; 75° 25’ N. 100° 33’ W. Present survey. Langley Point. On Byam Martin Island. A collection was made 19 km north of the point; 75° 22’ N. 103° 48’ W. Present Survey. Byam Martin Channel: Maori Point. The western entrance point to Weatherall Bay, Melville Island; 76° 02.2’ N. 107° 42’ W. Present survey. Towson Point. On Melville Island at the narrow portion of the channel. A collec- tion was made about 8 km north of the point; 75° 57’ N. 105° 32.5’ W. Present Survey. Burnett Point. South of Towson Point on Melville Island. A collection was made about 2 km north of the point; 75° 44.2’ N. 105° 22’ W. Present survey. Byam Channel: Richardson Point. The northwest entrance point of the channel; 75° 32.5’ N. 105° 30’ W. Present survey. BP Consett Head. About midway of the chan- nel on Melville Island; 75° 19’ N. 105° 40’ W. Present survey. Robertson Point. South of Consett Head on Melville Island. Collections were made off the point and about 5 km south near an unnamed point; 75° 09’ N. 105° 51’ W. Present survey. Kay Point. The southwestern tip of Byam Martin Island. A collection was made about 5 km north of here; 75° 11’ N. 104° 52’ W. Present survey. Viscount Melville Sound: Cape Cockburn. The southwestern tip of Bathurst Island; 75° 03’ N. 100° 20’ W. Nelson Griffiths Point. The southwestern entrance point to Byam Channel, Mel- ville Island; 75° 03’ N. 105° 58’ W. Present survey. Little Point. South of Nelson Griffiths Point. Collections were made about 10 km southward of the point; 75° 01.5’ N. 106° 32’ W. Present survey. Barnard Point. The northeastern entrance to Richard Collinson Inlet, Victoria Island; 73° 00’ N. 113° 10’ W. Present survey. Wilkens Strait: Brock Island. A collection was made in the unnamed channel south of Wilkens Strait between Brock Island and Mac- kenzie King Island; 71° 51’ N. 113° 36’ W. Present survey. Hecla and Griper Bay: Cape Fisher. On the west side of the bay, Melville Island; 75° 49.4 N. 111° 26’ W. Present survey. Kellett Strait: Pedder Point. The southeastern extremity of Eglington Island. A collection was made north of the point; 75° 30.8’ N. 118° 31’ W. Present survey. Crozier Channel: Manson Point. The eastern entrance point to Mould Bay, Prince Patrick Island; 76° 05’ N. 119° 04’ W. Present survey. Mould Bay. At Prince Patrick Island; 76° 13’ N. 119° 23’ W. Present survey. M’Clure Strait: Cape Mecham. The western entrance point to Walker Inlet, Prince Patrick Island; 75° 44’ N. 121° 01’ W. Present survey. Beaufort Sea: Cape Prince Alfred. The northwestern extremity of Bank Island; 74° 20.3’ N. 124° 44’ W. Present survey. Peninsula, Devon Island; 76° 50’ N. 96° 50’ W. 73 Literature Cited Adey, W.H. 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(1973) The morphology and systematics of the Audouinella complex (Acrochaetiaceae, Rhodophyta) in northeastern United States. Rhodora 75(804): 529-621. Zinova, A.D. (1955) Opredelitel’ krasnykh vodoroslei severnykh morei SSSR. Akad. Nauk SSSR, Moskva-Leningrad. (Key to red algae of the northern seas of the USSR.) Zinova, A.D. (1961) Okrasnoi vodorosli Dilsea integra (Kjellm.) Rosenv. Akad. Nauk USSR, Moskva- Lenningrad 14: 82-86. (The red alga Dilsea integra (Kjellm.) Rosenv.) 78 Index to Species Acrochaeta 9 repens 9, 22 Acrochaetium 11 parvulum 11, 48 Acrosiphonia 10 arcta 10, 25, 49 hystrix 10, 26, 49 Agarum 7, 11 cribosum 7, 11, 45 turneri 45 Ahnfeltia 12 plicata 12, 34, 56, 59 Alaria 11 dolichorhachis 45 esculenta 11, 45 grandifolia 11, 46 musaefolia 45 oblonga 45 pylaii 11, 46 f. grandifolia 46 Antithamnion 12 americanum 12, 59 boreale 12, 59 cruciatum 60 plumula var. boreali 59 var. pylaisaei 60 pylaisaei 12, 60 Arthrochaete 9 penetrans 9, 22 phaeophila 22 Ascocyclus foecundus 35 islandicus 35 Ascophyllum 11 nodosum 11, 48 Asperococcus 11 echinatus 11, 40 Audouinella 11 efflorescens 11, 49 hallandicum 11, 49 membranacea 50 purpurea 11, 49 spetsbergense 11, 50 Balanus balanoides 7 Blidingia 9 marginata 9 subsp. marginata 9, 18 subsp. subsala 9, 18 minima 9, 17, 18, 25 var. minima 9, 18 var. ramifera 9, 18, 20 Bolbocoleon 9 piliferum 9, 22 Callithamnion boreale 60 pylaisaei 60 rothii 50 sparsum 50 Callithamnium americanum 59 Callophyllis 11 cristata 11, 15, 54, 61 Callymenia sanguinea 54 Calothrix scopulorum 24, 30 Capsosiphon 9 fulvescens 9, 17, 18, 26 Castagnea virescens 37 Ceramium 12 rubrum 12, 60 tenuissimum 12, 60 Ceratocolax 12 hartzii 12, 57 Chaetobolus 9 gibbus 9, 23 Chaetomorpha 10 aerea 26 capillaris 27 linum 10, 26 melagonium 10, 17, 18, 22, 23, 21, 20, 00, Ol; ve, 33, 35, 36, 39, 49, 50, 59 tortuosa 27 wormskioldii 25 Chaetophora maritima 30 Chaetopteris plumosa 34 Chantransia efflorescens 49 hallandica 49 f. parvula 48 microscopica 48 Chlorochytrium 9 dermatocolax 9, 15 inclusum 9, 15, 26 var. dermatocolax 15 schmitzii 9, 16 Chorda 11 filum 11, 22, 41 lomentaria 40 tomentosa 11, 22, 41 Chordaria 10 flagelliformis 10, 22, 37, 41 Choreocolax 12 odonthaliae 12, 54 Cladophora 10, 23, 36, 49 arcta 25 var. hystrix 26 flexuosa 28 glaucescens 27 gracilis 27, 28 hystrix 26 lanosa 26 pachyderma 28 rudolphiana 28 sericea 10, 27 sp. 10, 28 Clathromorphum 11 circumscriptum 52 compactum 7, 11, 52 Codiolum 9 gregarium 9, 15, 25 nordenskioldianum 15 pusillum 9, 15 Coilodesme 11 bulligera 11, 41 Colaconema 11 membranacea 11, 50 Conchocelis rosea 48 Conferva 4 melagonium 27 Cruoria 12 arctica 12, 55 firma 55 Cruoriopsis 12 hyperborea 12, 55 Cystoclonium purpurascens 58 Delesseria alata 61 angustissima 61 baerii 61 corymbosa 61 montagnei 61 rostrata 61 sinuosa 61 Dermatocelis 10 laminariae 10, 35 Desmarestia 10 aculeata 10, 22, 28, 30, 37, 49 viridis 10, 38 Desmotrichum 10 balticum 39 undulatum 10, 23, 39 Dichloria viridis 38 Dictyosiphon 11 foeniculaceus 11, 15, 22, 30, 41, 49 f. flaccidus 41 f. hispidus 41 hippuroides 41 hispidus 41 Dilsea integra 50 Diploderma amplissimum 48 miniatum 48 Diplonema percursum 18 Dumontia 11 filiformis 50 incrassata 11, 50 Ectocarpus 10 aecidioides 36 confervoides 29 dasycarpus 29 farlowii 28 fasciculatus 10, 29 firmus 28 hiemalis 29 holmii 29 landsburgii 29 littoralis 28 ovatus 29 79 penicillatus 29 siliculosus 10, 29 stilophorae 30 tomentosoides 30 Ectochaete 9 leptochaete 9, 23 wittrockii 9, 23 Elachista 10 fasciculata 35 fucicola 10, 36 f. Jubrica 36 lubrica 36 Endoderma leptochaete 23 wittrockii 23 Enteromorpha 9 aureola 18 clathrata 9, 19 compressa 9, 19 f. prolifera 20 crinita 9, 20 erecta 20 flexuosa 9 subsp. paradoxa 9, 20 groenlandica 9, 20 intestinalis 9, 19, 20 var. compressa 19 var. genuina 20 f. micrococca 18 var. minima 18 linza 9, 20 marginata 18 micrococca 19 f. subsala 18 f. typica 18 minima 18, 19 plumosa 20 prolifera 9, 20 subsp. prolifera 21 ramulosa 20 Entocladia 9 flustrae 24 viridis 9, 23 wittrockii 23 Entonema aecidioides 36 Epicladia 9 flustrae 9, 24 Erythrocladia 11 irregularis 11, 48 polystromatica 11, 48 Erythropeltis 11 discigera 11 var. flustrae 11, 48 Erythrotrichia 11 carnea 11, 48 ceramicola 48 Eudesme 10 virescens 10, 37 Euthora cristata 54 Floridea 4 Fucus 11, 28, 42 ceranoides 4 80 distichus 4, 7, 11, 22, 23, 25, 28, 29, 32, 33, 61, 62, 63 35, 39, 40, 41, 46, 59, 60, subsp. anceps 11, 46 subsp. distichus 11, 46 subsp. edentatus 11, 46 subsp. evanescens 11, 47 edentatus 46 evanescens 47 filiformis 46 inflatus 46 f. distichus 46 f. edentatus 46 var. edentatus 46 f. evanescens 47 var. evanescens 47 f. linearis 46 var. linearis 46 linearis 46 nodosus 48 vesiculosus 11, 47 Gayella polyrhiza 17 Giffordia 10 ovata 10, 29 Gloeocystis 9 scopulorum 9, 15 Gomontia 9 polyrhiza 9, 17 Gymnogongrus plicatus 56 Haemescharia polygyna 55 Halosacciocolax 11 kjellmanii 11, 51 lundii 11, 52 Halosaccion 12 dumontioides 58 ramentaceum 12, 15, 35, 36 51, 58, 61 Halosiphon tomentosa 42 Haplospora 10 globosa 10, 35 Harveyella 12 mirabilis 12, 54 Hecatonema 10 foecundum 10, 35 maculans 10, 35 Hildbrandtia rosea 52 Hildenbrandia 11 prototypus 11, 23, 52 Hormiscia penicilliformis 25 llea fascia 40 Isthmoplea 10 sphaerophora 10, 38 Kallymenia 11 pennyi 4, 54, 56 rosacea 56 schmitzii 12, 54 septemtrionalis 56 Kolderupia 10 maritima 10, 30 Kornmannia 9 leptoderma 9, 19 Kylinia hallandica 49 Laminaria 6, 7, 11, 17, 24, 28, 30, 34, 36, 39, 48, 50, 52,62 agardii 11, 42 atrofulva 43 cuneifolia 42 digitata 11, 42 fascia 40 groenlandica 7, 11, 24, 42, 43, 44 longicruris 11, 25, 30, 31, 36, 43, 44, 59 nigripes 11, 43 phyllitis 43 saccharina 7, 11, 42, 43 var. groenlandica 43 solidungula 7, 11, 24, 42, 43, 44 Laminariocolax 10 tomentosoides 10, 30 Leptonema fasciculatum 35 Leptonematella 10 fasciculata 10, 35 Leptophytum foecundum 53 laeve 53 Lithoderma 10 extensum 32 fatiscens 10, 25, 32, 33 kjellmanii 31 rosenvingii 33 subextensum 33 Lithothamnium 11 circumscriptum 52 colliculosum 53 compactum 52 fasciculatum 52 foecundum 11, 52 glaciale 11, 53 granii 53 laeve 7, 11, 53 polymorphum 54 tenue 52 Litosiphon 10 filiformis 10, 39 Littorina saxatilis 7 Melobesia polymorpha 54 Membranoptera 12 alata 12, 61 denticulata 12, 61 Mesophyllum lichenoides 52 Microsporangium 10 globosum 10, 36 Monostroma 9 arcticum 9, 19 blytti 21 fuscum 21 f. blytti 21 var. blytti 21 grevillei f. arctica 19 var. arctica 19 groenlandicum 20 leptodermum 19 oxyspermum 22 Myriactula lubrica 36 Myrionema 10 aecidioides 10, 36 foecundum 35 globosum 36 laminariae 35 strangulans 10, 36 Neodilsea 11 integra 11, 15, 22, 23, 28, 30, 31, 32, 50 Ochlochaete 23 gibbus 23 Odonthalia 12 dentata 12, 54, 61, 64 floccosa 49, 64 Omphalophyllum 11 ulvaceum 11, 40 Ostreobium 9 queketti 9, 16 Ozothallia nodosa 48 Pantoneura 12 angustissima 12, 61 baerii 12, 61 Percursaria 9 percursa 9, 18 Petalonia 11 fascia 11, 40 Petrocelis 12 polygyna 12, 55 sp. 12, 55 Peyssonelia 11 johanseni 11, 51 rosenvingii 11, 51 Phaeostroma 10 parasiticum 10, 30 pustulosum 10, 30 Phloeospora pumila 39 Subarticulata 39 tortilis 39 Phycocelis globosus 36 Phycodrys 12 rubens 12, 15, 22, 31, 60, 61 var. lingulata 62 sinuosa 61 Phyllaria dermatodea 42 Lorea 42 Phyllitis fascia 40 Phyllophora 12 brodiaei 57 interrupta 57 membranifolia 58 truncata 12, 15, 22, 23, 51, 57, 58, 60, 61, 62, 63 Phymatolithon 11 compactum 52 laevigatum 11, 54 polymorphum 11, 54 Pilayella 10 littoralis 10, 17, 25, 28, 30, 49 rupincola 28 varia 28 Pilinia 9 endophytica 9, 25 maritima 30 Pogotrichum filiforme var. penicilliforme 39 Polysiphonia 12 arctica 6, 12, 15, 22,.23, 24, 3; 48, 49, 62 urceolata 12, 15, 63 Porphyra 11 abyssicola 48 amplissima 48 laciniata 48 f. typica 48 miniata 11, 48 purpurea 11, 48 umbilicalis 48 Prasiola 9 johanseni 9, 16 Pringsheimia scutata 24 Pringsheimiella 9 scutata 9, 24 Protoderma marinum 24 Pseudendoclonium 9 submarinum 9, 24 Pseudolithoderma 10 extensum 10, 23, 25, 32 rosenvingii 10, 33 subextensum 33 Pseudopringsheimia 9 confluens 9, 24 fucicola 9, 25 Ptilota 12 pectinata 12, 60 plumosa 12, 61 var. serrata 60 serrata 60 Punctaria 10 glacialis 10, 22, 23, 28, 30, 31, 32, 35, 36, 40, 41 plantaginea 11, 40 Ralfsia 10 clavata 10, 25, 31 deusta 31 fungiformis 10, 31 ovata 10, 31 pusilla 31 tenuis 31 verrucosa 10, 31 Rhizoclonium 10 implexum 17, 26 kerneri 26 rigidum 26 riparium 10, 26 var. polyrhizum 26 var. riparium 26 tortuosum 26 Rhodochorton intermedium 49 membranaceum 50 mesocarpum f. penicilliformis 50 var. penicilliformis 50 penicilliforme 50 purpureum 49 f. intermedium 49 rothii 49 sparsum 50 spetsbergense 50 Rhododermis elegans 51 parasitica 51 Rhodomela 12 confervoides 12, 63 lycopodioides 12, 15, 18, 23, 30,,32).35)'36;,, 92, 49, 55, 63, 64 f. flagellaris 63 fl. lycopodioides 63 subf. tenera 63 f. tenuissima 63 var. tenuissima 63 tenuissima 63 Rhodophysema 11 elegans 11, 51 Rhodophyllis 12 dichotoma 12, 56 veprecula 56 Rhodymenia 12 interrupta 57 palmata 12, 23, 28, 39, 52, 59, 60 Rosenvingiella 9 polyrhiza 9, 15, 17 Saccorhiza 11 dermatodea 11, 42 Sarcophyllis arctica 50 Scaphospora arctica 35 Scytosiphon 11 lomentaria 11, 40 Soliera chordalis 58 Sorapion 10 kjellmanii 10, 23, 25, 31, 32 Sphacelaria 10, 28 arctica 10, 15, 22, 23, 28, 29, 33, 50, 59 cirrosa 10, 34 81 olivacea 35 pennata 34 plumosa 10, 28, 34, 35, 36, 49, 59, 61, 62, 63 racemosa var. arctica 33 radicans 10, 35 Spongomorpha 10 aeruginosa 10, 15, 26 arcta 25 hystrix 26 lanosa 15, 26 Stictyosiphon 10 tortilis 10, 17, 22; 28, 30, 35, 39, 41, 49 Streblonema 10 aecidioides 36 stilophorae 10, 30 Symphyocarpus 10 strangulans 10, 31 Turnerella 12 pennyi 4, 12, 15, 23, 30, 55, 56, 61 septembtrionalis 56 Ulothrix 9, 19 flacca 9, 17 implexa 17 laetevirens 9, 17 pseudoflacca 9, 17 speciosa 17 subflaccida 9, 18 Ulva 9 crassa 21 lactuca 9, 21 var. rigida 21 latissima 21 rigida 9, 21 Ulvaria 9 obscura 9 var. blytti 9, 21 oxysperma 9, 22 Ulvella confluens 24 fucicola 25 Urospora 9 collabens 25 mirabilis 10, 15, 17, 25 penicilliformis 15, 25 wormskjoldii 10, 25 82 LA