REPORT

OF THE

VOLUME IV: BOTANY

PART F: MARINE DIATOMS

By ALBERT MANN

SOUTHERN PARTY—1913-16

OTTAWA
F. A, ACLAND
PRINTER TO THE KING’S MOST EXCELLEMT MAJESTY
1925

Issued 12th November, 1925

Report of the Canadian Arctic Expedition, 1913-18.

Part A:
Part B:

Part A:
Part B:

Part H:

___Myriapods. By Ralph V. Chamberlin.......... afd Gmia sake ee (Issued July 14, 1919).
Part I: LEPIDOPTERA. By Arthur Gibson.............. cece scence eens (Issued January 10,1920).
Fare J: ORTHOPTE RA. Dor Tl. Mo Wale ccc con danes sx sume aeag a eats (Issued seein 4 1920).
Part K: aoe aia ON THE WESTERN ARCTIC COAST OF AMERICA. By Frits,
re deshcliysee celine eeacats Sah ng ei oor Se et Issued November 7, 1921).
Part L: GENERAL INDEX. i tidubus austen abeldla atenekd. aeheeie. slau aastlane siafale PPS 0 Sense (Issued December, 1982).
VOLUME IV: BOTANY (
Part A: FRESHWATER ALGAE AND FRESHWATER peas By (harden W. Lowe.
Soh Lia MG LOT BORA OR RON 8 eka Ree Byes Rees . (Issued February 20, 1923).
Part B: MARINE ALGAE. By I.S. Collins and M. A. Howe. (In preparation).
Part C: FUNGI. By John Dearness..... " . (Issued June 1, 19238).
Part. D: LICHENS: By'G.K Merrill: cuss cs'sccstes udvac sestecstuals dara wwcey genes se (Issued July 16, 1924).
Part E: MOSSES. By R. S. Williams........... Issued February 8, 1921). -
Part F: MARINE DIATOMS. By Albert Mann................ sss eee eeeeeee (Issued........ sey 1925).
VOLUME V: BOTANY
Part A: VASCULAR PLANTS. By James M. Macoun and Theo. Holm ..... (Issued October’ 14, 1921 ).
Part B: CONTRIBUTIONS TO MORPHOLOGY, SYNONYMY AND GEOGRAPHICAL DIS-
‘TRIBUTION OF ARCTIC PLANTS. By Theo. Holm...... (Issued February 10, 1922).
Part C: GENERAL NOTES ON ARCTIC VEGETATION. By Frits Johansen.
a ts arava alae ein va ech Decne ce Pave Sw oell dcr Esk skdevarw ap BE ous RSet (Issued October 7, 1924).
VOLUME VI: FISHES, TUNICATES, ETC.
Part A: FISHES. By F?Johansen................0.65 Sih PI Ee Un SRLS en RN (In preparation).
Part B: ASCIDIANS, ETC. By A.G. Huntsman. sopagerdinperanaiacala corti ne duduaxehees (Issued November 29, 1928).
VOLUME VII: CRUSTACEA |
Part A: DECAPOD CRUSTACEANS. By Mary J. Rathbun ............... (Issued. August 18, 1919),
Part B: SCHIZOPOD CRUSTACEANS. By wale Jos Bebra tt.c 04 ca2e (Issued September 22, 1919).
Part 0: CUMACE A, By We Us © aii tise: dy ess onseweda~ been be wereare bx (Issued October 15, 1920).
Fatt i ISOPrODA, By BP. le BOGK6, 6.00.0 se5e ne mesiwer nw eco med Ome omens (Issued November 10, 1920).
Part E: AMPHIPODA. By Clarence R. Shoemaker..............20e0eeees (Issued September 7, 1920).
Part F: PYCNOGONIDA. By Leon J. Cole............cceseeeneeeeenee ...([ssued January 8, 1991),
Part G: EUPHYLLOPODA. By F. Johansen.. stag seieid WANTS AMEE AC AR ...-Ussued May 10, 1922),
Part H: CLADOC a By Chancey Juday..... ws agnor savegaratasahcene wtcace (Issued June 23, 1920).
Part I: OSTRAC SV 'Gy O's SAtS sie as wanrentieroriare ciginie tye sion Meise aseceaeiverwesualote- om (In preparation).
Part J: PRESHWATER BY PEPOnA.: By C. Dwight Marsh ‘Xsan Lain S008 (Issued April 21, 1920).
Part K: MARINE COPEPODA. By A. Willey.............0..0. ath terete ep Seegeta (Issued June 26, 1920),
Part L: PARASITIC pOrErOD Pre Charts B. Wilson aca RAMOS SaaS cecdabheS (Issued August 6, " 1980).
Part M: CIRRIPEDIA. By H.A. Pilsbry....:....00. 0. eel cece cee eee eee eee (In n preparation).
: THE GRUSTACHAN tire: OF SOME ARCTIC LAGOONS, LAKES AND PONDS |

VOLUME I: GENERAL POON BAER ATEES ETC. | y
NORTHERN, PARTY, 1913-18...... eee Heraldic saeaasieeis seaeines aa (To be prepared).
SOUTHERN PARTY, 1913-16. By Rudolph ‘artin Anderson.....,...+-++4 (In preparation).

5 VOLUME OH: MAMMALS AND BIRDS

MAMMALS OF WESTERN ARCTIC AMERICA. By Rudolph Martin Anderson.
gS aN teens ida avs seas bone isan” ape rs ls avg Soa, ater shoes naz c gnctope receane Wiaoua oes (In PR pEEOnOR)s
BIRDS OF WESTERN ARCTIC AMERICA, By R. M. Anderson and P. A. Taverner.
nisind ime Sees we ge eee ssletct sisisciage sarc tuldesbaten seiseweciaetaee sags teneaoa (EM preparation).

VOLUME MI: INSECTS

INTRODUCTION. By C. Gordon Hewitt....,....0000ccceeeeeees (Issued December 10, 1920).
: COLLEMBOLA. By Justus W. Folsom.............0cece ence cree ee eeens (Issued July.10, 1919).
ee INSECTS. By Nathan Banks...... peice eS Sees (Issued July 11, 1919).

Crane-flies. By Charles P. Ve

‘Mosquitoes. By Harrison G. D j ‘

Diptera (excluding Tipulidw and ‘Culicides). By J. R. Malloch........ (Issued July 14, 1919),
: MALLOPHAGA AND ANOPLURA.

Mallophaga. By A. W. Baker.

Anoplura. By G. F. Ferris and G, HyB, Nuttall .a..ce00 eeuxe (Issued September 12, 1919).
: COLEOPTERA. By

Forest Insects, including Tpide, ec a and Buprestide. By i: M. Swaine.

Carabida and Silphidj, By H.C.

Coccinellidex, Elateridx, Chrysomelide and st ictonicen sacs ee ByC. W. Leng.

Dytiscide. By J. D. Sherman, Wisny «5 She sess ueEM Kees DENTE (Issued December 12, 1919).
: HEMIPTERA., By Edward P. ‘VanDuz ns settee Brdniaakente Moreno (Issued July 11, saci
: HYMENOPTERA AND PLANT-GALLS.

Sawflies. (Tenthredinoidea). By Alex. D. MacGillivray.

Parasitic Pymonopere By Charles T. Brues.

Wasps and Bees. F. W. L. Sladen.

Plant Galls. By E "aanter BIG MG iste aust sxiates seseayegirauseh daayine. Seoeoueretesesoe (Issued November 8, 1919).
SPIDERS, MITES AND MYRIAPODS.

Spiders., By J. H. Emerton.

Mites. By Nathan Banks,

By F. Johansen... fate eee aaa oe WRN 4 heRe Reeor susan s eee es (Ussued December 30, 1922).

| :

|

REPORT

OF THE

CANADIAN ARCTIC EXPEDITION
1913-18

VOLUME IV: BOTANY

PART F: MARINE DIATOMS

By ALBERT MANN

SOUTHERN PARTY—1913-16

OTTAWA
F. A, ACLAND
PRINTER TO THE KING’S MOST EXCELLENT MAJESTY
1925

Issued 12th November, 1925

Cornell University

The original of this book is in
the Cornell University Library.

There are no known copyright restrictions in
the United States on the use of the text.

http://www.archive.org/details/cu31924074095450

The Marine Diatoms of the Canadian Arctic Expedition,
1913-18

By ALBERT Mann
Diatomist, Carnegie Institution, Washington, D.C.

The following report is a rather fragmentary contribution to the marine
diatom flora of the Arctic seas. The number of gatherings secured was small
and the different species they contained turned out to be comparatively few.
The list therefore compares poorly with what would have been obtained from
the richer floras of other parts of the world. This is not at all a surprising fact,
for previous studies of Arctic diatom material have shown that in diversity of
species it is uniformly very scanty. As to why this is so no satisfactory explan-
ation has been found. One is disposed to assume that the rigorous temperatures
and the long winter nights of these high latitudes must affect the diatoms as
they are known to do some other organisms, checking a tendency to elaborate-
ness of structure and consequently to that variability which would after a
while give us those differences on which we depend for the separation of species.
And in fact we do find that the Arctic diatoms as a class are surprisingly simple
in form and much less elaborate in their ornamentation than those of other
regions. Especially is there a preponderance of the so-called Naviculoid diatoms,
rather plain, boat-shaped structures, with simple designs of ornamentation,
and destitute of those horns, arms, spines, etc., that often adorn the species
growing in warmer waters. So that, if we were to draw deductions from the
evident and unusual simplicity of the diatoms of all Arctic gatherings, including
those here recorded, we would be pretty sure to infer that cold and darkness
had here brought into existence a flora singularly suppressed in its ornamenta-
tion.

But a study of the diatoms of the Antarctic seas forbids our putting too
much stress on this inhibition of low temperature and darkness. Without
denying wholly its influence, we find in the Antarctic, where equally frigid
waters and long periods of night occur, one of the most varied:and elaborately
ornamented diatom floras now living. There the cruder and perhaps more
primitive Naviculoid group is in the decided minority, round polygonal and
other symmetrical shapes being more common, and usually adorned with com-
plex sculpturing and a variety of horns, spines and other ornamental append-
ages. If therefore frigid temperatures and long winter nights are responsible
for the simplicity in structure and poverty of species of the Arctic: diatoms our
theory only conjures up another equally difficult problem, namely, why these
same factors fail to operate in the Antarctic region. Consequently, as above
stated, a good explanation of the marked simplicity of Arctic diatoms is not
known to the writer.

There is, however, one fact, perhaps too inconsequent to merit serious
thought, which it may be worth while to mention: the Antarctic differs greatly
from the Arctic in its approaches. The latter region is joined to the vast seas
that flow around the world by only two comparatively narrow channels, a
condition due to the fact that both the Eastern and the Western hemisphere
have their broad areas at the extreme north and taper away to a point south-
ward; so that the shores of North America on the west are close to those of
Asia and on the east to those of Europe; and furthermore, the chief ingress
current into the Arctic in through the narrower of these two openings, namely,

3697—1} 3Fr

4F Canadian Arctic Expedition, 1913-18

Bering strait, while the: wider channel between Greenland and Spitsbergen
serves mainly for a southward moving outflow. The Antarctic, on the other
hand, has no such barriers interposed between it and the rest of the watery
world. If one consults a chart of the great sea currents it will be readily seen
how free is the interchange between the Antarctic sea and the vast ocean areas
of the world, and how restricted the interchange between these 4nd the waters
of the Arctic. Now, it is at least possible that the narrowness of these water-
ways linking the Arctic with the rest of the world constitutes a barrier to the
introduction of new forms of marine life from other regions, among which new
forms there might well be now and then species adaptable to the rigorous life
conditions of polar waters and which would thus add to the richness of its local
flora and fauna. For such introductions, multiplied and continued through
long agés, would have no inconsiderable influence in this respect. And as the
Antarctic sea does lie open to such importations, it is not to be wondered at that
we find there, as we do find, a much richer diversity of diatoms, some of them
perhaps locally evolved and some immigrants from other regions.

It would be a mistake to conclude from the foregoing that diatoms find an
uncongenial home in the Arctic region. Although simplicity of structure and
low number of species are characteristic of that locality the diatoms that do
grow there flourish amazingly; so that in the matter of quantity few regions
are as prolific of diatoms as the Arctic. Dr. Nansen and other explorers of the
North Polar seas have recorded the unusually rich dredgings of diatom ooze
secured there. The species adapted to a life in those frigid waters, with their
long winters, of night, are indeed few; but the fecundity of those that do grow
there probably surpasses anything to be found in temperate or tropical regions.
And in this respect any difference between Arctic and Antarctic diatoms wholly
disappears; for in the Antarctic also the richness of the diatom ooze is start-
ling and will impress anyone familiar only with material coming from tempe-
rate or tropical waters. This fact is deserving of the attention of all ecologists,
because it is closely linked with the abundance of animal life inhabiting the
northern and southern polar seas.

There will be found following each species in the list of diatoms here re-
corded one or more references to diatom literature. These have been so selected
as to give the best descriptions and especially the best illustrations of the species
in question; or in a few instances they refer to some figure which most accurately
depicts that particular variation from the type form which is the one here dis-
covered. This selection of references is necessary in fixing the forms here re-
corded because many figures in diatom publications are misnamed or, even
more important, are so minute or so unreal in their markings as to be worthless.
‘This is particularly true of illustrations made by early diatomists, to whom a
sketchy suggestion of the diatom they were recording seemed to be quite satis-
factory if it distinguished it from the comparatively few forms then known to
the science. In consequence we find that to-day many of the figures and des-
criptions in these old works have become utterly valueless for purposes of
identification, as for example, Ehrenberg, Agardh, Kiitzing, Nitzsch, ete.
However, out of the most of these old named forms there have grown up quite
definite concepts, the modern idea of the species; and it is to these later, sharply
distinctive illustrations and descriptions that reference is here made.

In publications more modern than the foregoing we find much deplorable
confusion introduced into diatom taxonomy because some authors have, on the
one hand, assigned to the same species wholly different diatoms, or, on the other
hand, have given new names to species already fixed. This has come about part-
ly through carelessness but chiefly because of the rarity of so many important
diatom publications. As the writer enjoys the advantage of being able to con-
sult practically every work of value on this subject it seems worth while to correct
in this paper some of these blunders by referring the reader, as above stated,

Marine Diatoms 5F

to those illustrations and descriptions which best record the characteristics of
the species in question.

Only the species that are new or that show exceptional variations from the
type forms are illustrated in this paper. The species recorded were collected by
Mr. F. Johansen and the localities are as given in his field list of collecting
‘stations.

The specimens of these new forms are deposited in the diatom collection of
the United States National Museum, Washington, D.C., as well as nearly all
the known species herein recorded. Each specimen is mounted separately on a
properly labeled slide; so that the difficulty of finding the individual diatom
named, so difficult to locate on the ordinary strewn slides, is wholly avoided.
All the specimens in the Museum diatom collection are freely available for
examination by interested diatomists.

The nomenclature followed in this report is that which has received the
general approval of diatomists. It rejects some obscure names which a few
authors claim to antedate and be synonymous with those in common use, such
as, Tessella for Rhabdonema, etc. “The author feels that sufficient doubt exists
as to the generic boundaries of these archaic names to justify their abandonment
to the oblivion in which they have long reposed, especially as much needless
confusion must result if they now supplant the well known and classical names
used in our most valuable diatom books. This is the position taken by Van
Heurck, DeToni, Schmidt, Brun, and the majority of diatom writers. There
is also a rejection here of the set of new generic names proposed by P. T. Cleve
(see Cleve’s Naviculoid Diatoms) for breaking up the huge genus Navicula into
more compact divisions. The genus is unwieldy; but the writer agrees with the
above mentioned diatomists that these proposed new genera are too misty in
outline to be workable, useful as they may be for subgeneric grouping.

There is a chance of confusion in the record of the marine diatoms found
by the Canadian Arctic Expedition because of a report already published on the
fresh-water diatoms of the expedition. In it quite a number of marine diatoms
are included. Its author, Mr. Charles W. Lowe, is careful to refer to this in his
introductory remarks and to explain the reason for the mixed character of the
diatom flora, as well as the fauna, found in some of the ponds and lagoons ad-
jacent to the sea. He also notes the marine character of many of the species in
his list. I find there are twelve marine species in the list which do not appear in
the following enumeration, because the writer has found no specimens of them
in any of the marine gatherings secured, and not having seen Mr. Lowe’s speci-
mens the following additions to my list are on his authority:

Grammatophora angulosa Ehr. See vol. IV, Part A, page 36a of this report
ce

Navicula Crabro Ebr o ae 4la “

Navicula Hennedyi W. Sm. “ eo a 42a is es
Navicula humerosa Breb. “ ne 7 42a ee me
Niteschia acuminata (W.Sm.) Grun. ee es 394 i eo
Niteschia lanceolata W. Sm. oh . 39a a 2
Opephora Schwartzit (Grun.) P. Petit EB 37A . me
Pleurosigma hippocampus W. Sm. es 434 se ‘S
Stauroneis Gregorti Ralfs o a Ala ae is
Surirella fastuosa Ehr. a “f 40a as a
Surirella recedens A. Sch. ts a 40a es .

} } “ [73
Surirella regina Jan. ‘“ & As

6F

32a:
56a:

40d:
41:

41b:
Ale:
42b:
42a:

Canadian Arctic Expedition, 1913-18

LIST OF COLLECTING STATIONS

Nortu Paciric

Latitude 56° 26’ N., long., 183° W., June 24, 1913.
Plankton-net on surface.

: Lat. 54° 38’ N., long. 157° 45’ W., June 30, 1913.

Plankton-net on surface.
Lat. 54° 30’ N., long. 159° 42’ W., June 1, 1913.
Plankton-net at surface.

BERING SEA

Off cape Romanzof, Alaska. Lat. 62°N., long. 167° 30’ W., July 7,
1913. Plankton-net at surface.

Teller (Grantley harbour), Alaska. Lat. 65° 15’ N., long. 166° 30’
W., July 30, 1913. Plankton-net at surface; water depth 2 fathoms.
Same locality and date. Beam-trawl for 15 minutes, 2-3 fathoms.
Port Clarence bay, near entrance to Grantley harbour, Aug. 4, 1913.
2-foot beam-trawl for 20 minutes in 2-3 fathoms. Sandy mud with
algae.

Arctic OcEAN

Off Cape Lisburne, Alaska. Lat. 68° 48’ N., long. 165° 10’ W. Aug.
16, 1918. Plankton-net at surface.

North of Blossom shoals, Alaska. Lat. 70’ 24’ N., long. 161° 25’ W.,
Aug. 19, 1913. 4-foot beam-trawl for 20 minutes in 9-10 fathoms.
Gray mud with many pebbles.

Off Plover islands, 10 miles east of point Barrow, Alaska. Lat. 71°
20’ N., long. 156° W., Aug. 27-28, 1913. Plantkon-net at surface.
Collinson point, Alaska. Lat. 69° 59’ N., long., 144° 49’ 47” W.
October 3, 1913. 3 fathoms, sandy mud with algae.

Beaufort sea, northeast of Alaska-Yukon International boundary.
Lat. 70° 13’ N., long., 140° 50’ W., April 4, 1914. About 30 fathoms of
water. From stomach of seals, Phoca hispida Schreber.

Beaufort sea, northeast of Alaska-Yukon International boundary.
Lat. 70° 20’ N., long., 140° 20’ W., April 6, 1914. Haul in ice, about
150 fathoms of water. Plankton-net vertical hauls.

Martin point, Alaska. Lat. 70° 07’ N., long., 143° W.

Harrison bay, Alaska. Lat. about 70° 30’ N., 150° W., Aug. 6, 1916.
Plankton-net No. 3 at surface for 5 minutes.

Do.eHIN AND UNION Srrait, NortHwest TERRITORIES

Bernard harbour. Lat. 68° 47’ N., long. 114° 50’ 27” W. June 8,
1915. Plankton-net No. 3, vertical hauls from 3 fathoms up.
Bernard harbour. Outer harbour. 4-foot beam-trawl from ship for
45 minutes. 3-5 fathoms of water. Sandy mud with algae. July 20,
1915.

Bernard harbour. Inner harbour, salmon nets in 2-3 fathoms. July
24, 1915.

Bernard harbour, outer harbour. 2-foot square dredge for 20 minutes
from motor-boat. 3-8 fathoms of water clay and gravel with algae.
Bernard harbour, Inner harbour. Same locality as 41b. Sept. 1-2,
1915.

Off Bernard harbour, Dec. 2, 1915. Water depth 16 feet. Tide-hole
in ice. 8 vertical hauls with plankton-net, from surface to bottom.

Marine Diatoms TF

43a: Off Cockburn point. Lat. 68° 47’ N., long. nearly 115° W. Sept. 13,
1915. 4-foot beam-trawl. for 1 hour. About 50 fathoms of water,
sandy mud with pebbles.

43b: Same as 43a. Sept. 14, 1915, and off Stapylton bay, 25-30 fathoms, 30
minutes trawling.

43e: West of Cockburn point, Sept. 14, 1915. 10-15 fathoms, sandy mud
with many stones; 4-foot beam-trawl and 2’ x 4’ square dredge for 1 hour.

43d: Locality and date as 43b.

43f: Locality and date as 43c. :

439: Bernard harbour, cuter harbour. Oct. 30, 1915. Bottom sample;
sandy mud.

46b: Off Bernard harbour, same locality as 422, but on February 5, 1916.

50b: Stapylton bay, off Young point, N.W.T., Lat. 68° 55’ N. long., 116°
52’ W., July 17, 1916, about 10 fathoms of water. Plankton-net
No. 3 at surface. ‘

LIST OF SPECIES AND SYSTEMATIC DISCUSSIONS
Achnanthes Bory

Achnanthes arctica (Cl.) Mann
Cleve Arct. Diat., Pl 4, fig. 22.
It is called Achnanthidium arcticum in the above reference. Cleve changes

it into a variety of Achnanthes brevipes Ag. in Nav. Diat., II, p. 194, a doubtful
assignment. Specimens were found in dredgings made at Stations 23 and 43a.

Achnanthes brevipes Ag.

Van Heurck Syn., Pl. 26, figs. 10-12.

Especially abundant in a dredging made in Dolphin and Union strait west
of Cockburn point, Sept., 1915, Station 438c.

Achnanthes hyperborea Grun.

Grun. Diat. F. Jos. Land, Pl. 1, figs. 4-5.
Found in a dredging made at Station 430.

Achnanthes parvula Kitz.

Van Heurck Syn., Pl. 26, figs. 25-28.
Found with the foregoing.

Achnanthes rhombica Ostr., var.

Pl. I, figs. 1-2; Ostr. Diat. N.E. Greenland, p. 215, Pl. 13, fig. 18.

My specimen agrees in general with this little known species, an illustration
of which is here given, because the type figure differs somewhat and is in an
obscure publication. The chief differences are that in my specimen there is no
central hyaline area on the lower valve and its costae are far less flaring at the
center; the form also is less angular. Incidentally my specimen is larger;
length 0-041, width 0-014, 8-6 lines in 0-01 mm. (Ostrup’s specimen having,
length 0-034, width 0-012, 11 lines in 0-01 mm.). One specimen, Station 41,
plankton haul. .

Achnanthes subsessilis Kitz.

Van Heurck Syn., Pl. 26, figs. 21-24.
Found rather abundantly at Stations 23 and 48a.

8F Canadian Arctic Expedition, 1918-18

Actinocyclus Ehr.

Actinocyclus curvatulus Jan.

Sch. Atlas, Pl. 57, fig. 31. ;

Found at Stations 23 and 43b. The form which Grunow has called Coscino-
discus curvatulus var. subocellata in his Diat. F. Jos. Land, Pl. 4, fig. 15, and
which Rattray in his Rev. Actinocyclus, p. 145, makes A. subocellatus (Grun.)
Ratt. may or may not be an Actinocyclus, according as its “pseudonodule
proves to be or not to be genuine; but to overthrow the specific name given by
Janisch does not commend itself, seeing that the present species has an unmis-
takable pseudonodule and entirely lacks the distinctive border of Grunow’s
form.

Actinocyclus moniliformis Ralfs. , .
Van Heurck Syn., Pl. 124, fig. 9; W.Sm. Brit. Diat., Pl. 4, fig. 41, misnamed.
Found in only one dredging, Station 20g.

Actinoptychus Ehr.

Actinoptychus undulatus Ehr.

Sch. Atlas, Pl. 1, figs. 1-4, 6. :

More or less common throughout the dredgings, markedly so in those from
Stations 20d, c, g, 23. The only example of this large marine genus found.

Amphiprora Ehr.

Amphiprora kryophila Cl.
Cl. Vega Diat., Pl. 35, fig. 11.
Found at Station 23, a single specimen.

Amphiprora obtusa Greg. (in part), see Tropidoneis Stauroptera (Bail.)
V. A.

Amphiprora paludosa W. Sm.

Perag. Diat. France, Pl. 38, figs. 12-15.

Scarce in three dredgings made at Stations 20b-c, 27s and 41, and the variety
called punctulata Grun. in Cl. and Grun. Arct. Diat., Pl. 4, fig. 84 also scarce in
a plankton gathering made at Dolphin and Union strait.

Amphora Ehr.

Amphora angusta Greg. var. ventricosa (Greg.) Cl.

Greg. Diat. Clyde, Pl. 12, fig. 68; see Cl. Nav. Diat., II, p. 135.

This is what Cleve called A. lanceolata Cl. in his Diat. Spitz., Pl. 23, fig. 2.
It is somewhat plentiful in dredgings made at Stations 23, 27s, 43b and 43+.

Amphora angustissima Mann, nom. nov.

Van Heurck, Belgica Exp., Pl. 5, fig. 5; Perag. Antare. Exp. France, Pl. 2,
fig. 27, both misnamed.

This is identical with the two figures given above, both from the Antarctic.
Van Heurck calls it Amphora angusta var. angustissima and Peragallo Amphora
lanceolata var. robusta. It is radically distinct from both these species. I have
given it the earlier of the two supplementary names, which has the advantage
of suggesting the slight resemblance to A. angusta, to which it stands nearer
than to A. lanceolata. Several specimens were found in the dredging made at
Station 43g, between Chantry island and the mainland, Bernard harbour,
Oct., 1915.

Marine Diatoms OF

Amphora costata W. Sm.

W. Sm. Brit. Diat., Pl. 30, fig. 253.

It is doubtful if this can be united with A. Erbi Ehr., as De Toni proposes,
that species being practically a nomen nudum. Found only in a dredging made
at Station 23.

Amphora crassa Greg.

Sch. Atlas, Pl. 28, figs. 31-33.

The type form was found only at Stations 43b and 43c and was scarce; but
the variety called punctata by Grunow was more abundant, occurring, plentifully
at Stations 20b-c, 27s, 43a and 48b.

Amphora cymbifera Greg.

Sch. Atlas, Pl. 25, figs. 17-19, 32-34, 36.

Found in dredgings made at Stations 23, 27s, 41, 43b, and the coarse form
shown in figure 19 above at Station 41c.

Amphora egregia A. Sch.
Sch. Atlas, Pl. 28, figs. 13-15; Pl. 39, figs. 26, 31, misnamed.
Found only in one dredging, Station 23.

Amphora excludens Mann, sp. nov.

Pl. I, fig. 8; also Sch. Atlas Pl. 25, fig. 12, unnamed.

Valve very narrow, its ventral edge nearly straight but slightly incurved
at the ends, its dorsal edge not arcuate but half-rhombic, the margin running
nearly straight from the widest point at the middle to the pointed apices, these
however curved ventrally like the beak of a bird; markings on dorsal side a
narrow band of closely set rows of beading, decreasing in width to the apices,
the rows radially inclined; on the ventral side a much narrower band of un-
beaded costae, reverse-radially inclined; rhaphe straight, near the ventral side,
bisecting a wide median hyaline space, the outer ends of the rhaphe curving with
the beak-like apices.

Length 0-146 mm.; width 0-018 mm.; 7-7 lines on the dorsal and 8-5 on
the ventral side in 0-01 mm.

This delicate species, with its dissimilar markings on the dorsal and ventral
sides, is less angular in Schmidt’s illustration than in the one made for this
report; the position of the rhaphe also is slightly different. Found only in a
dredging made at Station 41, a single specimen.

Amphora Eulensteinii Grun.

Sch. Atlas, Pl. 25, figs. 1-3.

Cleve in Nav. Diat., II, p. 135, includes this under A. angusta Greg., an
unsatisfactory change. Found at Stations 23 and 43c. i

Amphora Gourdonii Perag.
Perag. Antare. Exp. France, Pl. 2, fig. 23.
Several specimens of this somewhat doubtful species were found at Station

43a.
Amphora laevissima Greg.

Greg. Diat. Clyde, Pl. 12, fig. 72; Sch. Atlas, Pl. 26, figs. 3, 18.

Hardly to be united with A. laevis Greg., as is done by Cleve in Nav. Diat.,
II, p. 130. Found in one dredging, that made at Station 43d.

Amphora mexicana A. Sch.

Sch. Atlas, Pl. 27, fig. 47, also fig. 44, no name.

The above figure 44 from Spitsbergen should be included here. Found in
dredging from Stations 43a, 43b, 43¢ and 43g.

Amphora obtusa Greg.
Sch. Atlas, Pl. 40, figs. 4-7, 11, 16-17.
Rather abundant in the dredging made at Station 41.

10F Canadian Arctic Expedition, 1913-18

Amphora ocellata Donk.
Micro. Journ., 1861, Pl. 1, fig. 11.
Very scarce in only one dredging, Station 20b-c.

Amphora ovalis Kitz.
Sch. Atlas, Pl. 26, figs. 106-111.
Common in several dredgings, Stations 20b-c, 23 and 41.

Amphora Proteus Greg.
Greg. Diat. Clyde, Pl. 13, fig. 81; Sch. Atlas, Pl. 27, figs. 2-3, 5, 6.
Unusually large specimens of the type form were found in dredgings made
at Stations 20b-c, 27s, 43a, 43b, 48c, 48g; and the.variety Kariana Grun. at
Stations 41 and 43b.

Biddulphia Gray

Biddulphia aurita Breb.
Sch. Atlas, Pl. 122, figs. 1-8. : :
This cosmopolitan species occurs in most of the dredgings and is quite
abundant in those from Stations 20b-c, 20g, 23 and 41.

Biddulphia Edwardsii Feb.

Van Heurck Syn., Pl. 100, figs. 9-10.

All the specimens were varieties of the true type and showed a tendency to
merge into the next species. Found in dredgings from Stations 20g, 23 and
43b, and a plankton haul from Station 18d.

Biddulphia obtusa (Kiitz.) Ralfs.

Van Heurck Syn., Pl. 100, figs. 11-14.

Small specimens and as a rule having the form shown in fig. 13 above.
Found at Stations 20b-c and 20g, very abundant in the latter.

Biddulphia polymorpha (Kiitz.) Mann.

Van Heurck Syn., Pl. 104, figs. 3-4.

Much confusion exists about the form of this diatom because several authors
have united it with B. laevis without distinguishing between B. laevis Ehr. and
B. laevis W. Sm., it being the same as the latter but clearly different from the
former. As the old genus Cerataulus cannot be kept distinct from Biddulphia
this species is here reclassified. Found in dredging from Station 41.

Biddulphia Roperiana Grev.
Van Heurck Syn., Pl. 99, figs. 4-6; Sch. Atlas, Pl. 120, figs. 20-24, especially
ast.

Found in dredgings from Stations 20g, 23, 43a and 43g, and a spiny variety
at Station 20b-c.

Campylodiscus Ehr.

Campylodiscus angularis Greg.

Greg. Diat..Clyde, Pl. 11, fig. 53; Deby Camp., Pl. 3, fig. 22.
Found sparingly in dredgings from Stations 27s, 41, 43a, and 43c.

Campylodiscus striolatus Grun.

Sch. Atlas, Pl. 53, figs. 1-2.

Deby, in general a good authority on this genus, gives a figure of this species
but calls it C. Kutzingti Bail., see his Rev. Camp., Pl. 1, fig. 10. De Toniin Syl.
Alg., p. 610, quotes this without indorsement. If the foregoing figures are
compared with Bailey’s form figured in Wilkes Exp., Pl. 9, fig. 20, and the
description read on p. 178, it will be clear the two cannot be united. Found in
dredgings from Stations 20b-c, 23, and 43g, not abundant. °

Marine Diatoms llr

Campylodiscus Thuretii Breb.

Van Heurck Syn., Pl. 77, fig. 1; compare Micro. Journ., 1857, Pl. 1, fig. 41.

Schmidt states in his Atlas Pl. 17 that according to Grunow this species
was proven by Brebisson to include C. simulans Greg. (see second reference
above), and the two are generally united. Deby however keeps them separate,
figuring both in his Rev. Camp., Pl. 7, where they are quite dissimilar. But
most authors also include here C. parvulus W. Sm., which, if the same, should
replace both the other names. Without access to the actual specimens I must
follow the general nomenclature. Certainly Brebisson’s original figure in Dit.
Cherbourg, Pl. 1, fig. 3, is unlike any of these.

In most of the dredgings, particularly from Stations 23, 41, 43), 48c, 43g.

Chaetoceros Ehr. 2

Chaetoceros atlanticum Cl.

Gran Nord. Plankt., p. 64, fig. 74, Sch. Atlas, Pl. 337, figs. 1-2.

Present in most of the plankton hauls, especially from Stations 12d, 13a-c, 18
18d, 40d, and 56a.

Chaetoceros boreale Bail.
Gran Nord. Plankt., p. 73, fig. 87, Sch. Atlas, Pl. 325, figs. 5-6.
Found only in the plankton haul from Station 13a-c.

Chaetocercs constrictum Gran.
Gran Nord. Plankt., p. 80, fig. 96; Sch. Atlas, Pl. 338, fig. 1.
Found at Stations 6b and 12d, scarce in both.

Chaetoceros criophilum Cast.
Sch. Atlas, Pl. 342, figs. 1-3; Gran Nord. Plankt., p. 71, fig. 85, rather poor.
This shares with C. decipiens Cl. in being most abundant in the plankton
material examined. Found especially abundant at Stations 6b, 12d, 13a-c,
25b-c and 40d.

Chaetoceros decipiens Cl.

Gran Nord. Plankt., p. 74, fig. 88; Sch. Atlas, Pl. 321, fig. 20 and Pl. 343,
figs. 17-18. '

The most abundant of all the species found; especially noted at Stations
6b, 12d, 13a-c, 25b-c, 40d, 42” and 56a.

Chaetoceros Diadema (Ehr.) Cl.
Gran Nord. Plankt., p. 84, fig. 102; Van Heurck Syn., Pl. 82 bis, fig. 6.
Only the endocysts of this species were found, and in only one gathering,
Station 56a, a plankton haul.

Chaetoceros Jaciniosum Schutt.
Gran Nord. Plankt., p. 82, fig. 99.
Found at Stations 12d and 25b-c, not abundant.

Chaetoceros Mitra (Bail.) Cl.
Gran Nord. Plankt., p. 75, fig. 89.
- This is called Dicladia Groenlandicus by Cleve in his Arct. Diat., Pl. 2,
fig. 10. Found sparingly at Stations 6b and 12d, and in the dredging from
Station 48c.

Chaetoceros pelagicum Cl.

Gran Nord. Plankt., p. 84, fig. 101; Sch. Atlas Pl. 348, fig. 1.

Found only at Station 12d. It is thought by some to be a summer phase of
C. laciniosum Schutt.

12F Canadian Arctic Expedition, 1913-18

Cocconeis Ehr. (emend. Grun.)

Cocconeis arcta A. Sch.
Sch. Atlas, Pl. 191, fig. 1. e.
The type locality is unknown, Schmidt merely saying ‘Gazelle Expedition.”
It is a somewhat questionable’*member of this genus. Found in dredging from
Station 43d, scarce.

Cocconeis kamchatkiensis Mann, sp. nov.

PL. I, fig. 4; see also Sch. Atlas, Pl. 191, figs. 40, 42-43, unnamed.

Valve a perfect and broad ellipse with neither angular nor protruding
apices; upper valve having a strong marginal band of coarsely beaded costae,
equally wide around the entire valve, there being three beads in each row;
pseudo-rhaphe line evident, bordered on each side by a straight row of closely
set beads, outside of which are two to three rows of similar beads which are,
however, progressively curved and the beads more loosely and irregularly set,
producing thereby a wavy appearance, a considerable space between the outer
of these rows and the compact marginal band; under valve unidentified.

‘ Length 0-043 mm., width 0-029 mm., 10 lines in 0-01 mm. in marginal
and.

By comparing the illustration of this species here given with Schmidt’s
figures mentioned above, and for which he recognized there was no name, a
close resemblance will be seen. The suggestion of Cleve to group these under
C. Scutellum Ehr. is rightly rejected by Schmidt. In fact Cleve’s assembly of
forms under C. Scutellum in his Nay. Diat., II, pp. 170-171, is a hodge-podge
without boundaries. Nor can they be united with the fossil C. antiqua of Brun
(Diat. Jap., Pl. 8, fig. 5), a loosely dotted species with a wide central area that
always shows a unique onesidedness. It may be added, this species somewhat
resembles C. arctica Cl. in Vega Diat., Pl. 35, fig. 4a, a form with a decidedly
sigmoid rhaphe and pseudorhaphe. Found in two dredgings, Stations 23 and
430.

Cocconeis paniformis Br.

Sch. Atlas, Pl. 189, figs. 16-21.

This is one of the species which, as just stated, Cleve arbitrarily puts into
C. Scutellwm. Found in dredging from Station 41.

Cocconeis Scutellum Ehr.

Sch. Atlas, Pl. 191, figs. 17-27.

An extremely cosmopolitan diatom in both fossil and recent deposits. More
or less represented in most of the dredgings, abundant at Stations 41 and 41c.

Coscinodiscus Ehr.

Coscinodiscus Asteromphalus Ehr.

Sch. Atlas, Pl. 68, fig. 12; Van Heurck Syn., Pl. 180, figs. 1-2, 5-6.

This species, rather characteristic of arctic waters, was surprisingly scarce
in the dredgings examined and all the specimens were smaller and more delicate
than the type, thereby approaching C. Oculus-Iridis Ehr. which is classed as a
variety of C. Asteromphalus by many authors. Frequent only at Station 43a.

Coscinodiscus concinnus W. Sm.

Sch. Atlas, Pl. 114, figs. 8-9.

All specimens were small forms with coarse areolation, very unlike the type
structure. The two marginal processes set about 2/5 of the circumference apart,
characteristic of this species, were above the usual size. Found in only one
dredging, from Station 43a, but generally present in the plankton hauls, par-
ticularly from Stations 6b, 20a, 42x and 46b.

Marine Diatoms 13 F

Coscinodiscus curvatulus Grun.

Sch. Atlas, Pl. 57, fig. 30; Grun. Diat. F. Jos. Land, Pl. 4, figs. 9, 11-14.
At two stations, Nos. 41 and 439.

Coscinodiscus decrescens Grun. var. repleta Grun.
Grun. Diat. F. Jos. Land, Pl. 3, fig. 18.

Judging from Grunow’s figure this is too wide from the normal form to be
a good variety. Found in dredgings at Station 23.

Coscinodiscus excentricus Ehr.
Sch. Atlas, Pl. 58, figs. 46-49, the last the type form.
Widely distributed in the Arctic, in fact cosmopolitan. Found in dredgings

at Stations 43a and 43g, and a plankton haul from Station 25b-c, all in con-
siderable abundance.

‘Coscinodiscus heteroporus Ehr., var. (?)
Sch. Atlas, Pl. 61, fig. 4.
A species of doubtful worth. Found in a plankton haul at Station 43/.

Coscinodiscus kryophilus Grun.
Grun. Diat. F. Jos. Land, Pl. 3, fig. 21.
In only one dredging and there infrequent, Station 29g.

Coscinodiscus Kiitzingii A. Sch.
Sch. Atlas, Pl. 57, figs. 17-18; Sch. Nordsee Diat., Pl. 3, fig. 35, misnamed.
Found only in dredging made at Station 43a.

Coscinodiscus limbatus (Ehr.) A. Sch.

Sch. Atlas, Pl. 65, fig. 7; Ehr. Mikro., Pl. 20, fig. 29.

There is confusion about this species. Grunow would unite it with C.
radiatus Ehr., and De Toni puts it under C. marginatus Ehr. See discussion in
Schmidt above. Found only at Station 29g.

Coscinodiscus lineatus Ehr. .

Sch. Atlas, Pl. 59, figs. 27-30; Van Heurck Syn., Pl. 131, fig. 3. Found
sparingly at Stations 43a and 48b, and the doubtful variety called C. blandus
A. Sch. in his Atlas, Pl. 59, figs. 35-37, at Station 41. I have specimens of this
diatom from the Gulf of Mexico in which one valve is like Schmidt’s figures
and the other exactly like C. lineatus.

Coscinodiscus marginatus Ehr.

Sch. Atlas, Pl. 62, figs. 1-6.

Greville’s C. robustus, generally united with this species, proves to be a
wholly different diatom, an Endictya. Found in dredging at Station 23, and in
a plankton haul, Station 43f.

Coscinodiscus nitidus Greg.
Sch. Atlas, Pl. 58, figs. 17-19.
One broken specimen at Station 23.

Coscinodiscus nobilis Grun.
Jour. Roy. Mic. Soc., 1879, Pl. 21, fig. 1; Jan. Gaz. Exp., Pl. 6, fig. 13.
The figure by Janisch above is the only good one of this large and delicately
marked diatom. Found at Station 20b-c; so far as I know not found previously
north of England. The locality of the Gazelle specimen is not given.

Coscinodiscus Oculus-Iridis Ehr.

Sch. Atlas, Pl. 60, fig. 13.

The specimens were close to C. pacificus Ratt., but as Grunow suggests
(Denk. Wien. Akad., 1884, p. 77) this should be classified C. Oculus-Iridis, var.
pacificus. Found at Stations 23 and 29g.

14F Canadian Arctic Expedition, 1918-18

Coscinodiscus Payeri Grun.
Grun. Diat. F. Jos. Land, Pl. 3, figs. 12-14.
Found only at Station 23, there rather frequent.

Coscinodiscus polycanthus Grun. var. baltica Grun.
Grun. Diat. F. Jos. Land, Pl. 3, fig. 17.
Found only at Station 20b-c.

Coscinodiscus radiatus Ehr.

Grun. Diat. F. Jos. Land, Pl. 3, fig. 1.

The specimens were the variety which Grunow calls glacialis on the above
plate and var. borealis on p. 72. Found at Stations 23 and 430. fe

Coscinodiscus radiosus Grun.
Jan. Gaz. Exp., Pl. 5, fig. 9; Sch. Nordsee Diat., Pl. 3, fig..42, no name.
The above are identified in Ratt. Rev. Cose., p. 521. Found at Station 29g.

Coscinodiscus septentrionalis Grun.
Grun. Diat. F. Jos. Land, Pl. 4, fig. 33. .
Grunow expresses doubt of this being a variety of C. lacustris Grun., which
latter is probably a Cyclotella. Abundant in many of.the dredgings, particularly
at Stations 20b-c, 28, 41, 41c, 48a, 48b and 438c.

Coscinodiscus subglobosus Cl. and Grun.
Grun. Diat. F. Jos. Land, Pl. 4, figs. 19-20; Sch. Atlas, Pl. 58, fig. 44,

unnamed. :
This is a strictly Arctic species. Found in dredging at Station 430.

Coscinodiscus subtilis Ehr.
Sch. Atlas, Pl. 57, figs. 11-16. ;
A species of universal distribution and great variability. Found at Stations

23, 27s, 43a and 43d.
Coscinodiscus tuberculatus Grev.
Sch. Atlas, Pl. 57, figs. 40-42; Grun. Diat. F. Jos. Land, Pl. 3, fig. 29.
Grunow expresses doubt of his specimen from Franz Josef land being
this species because it had hitherto been found only in a fossil state. The dis-
covery of it here confirms Grunow’s identification. Found at Station 29g.

Coscinodiscus tubiformis Temp. and Brun.

Temp. and Brun, Diat. Jap., Pl. 7, fig. 6.

I suspect this to be nothing but a small, robust specimen of C. marginatus
Ebr. with a very wide girdle. I have found it frequently in cold marine waters
as well as here. Found in a plankton haul, Station 43/.

Cymbella Ag.

Cymbella arctica Lager.

Sch. Atlas, Pl. 10, fig. 12.

The type specimen was found at Spitsbergen; those found here agree
perfectly with the type. Station 27s.
Cymbella gastroides Kitz.

Sch. Atlas, Pl. 9, figs. 1-2; Grun. Diat. F. Jos. Land, Pl. 1, fig. 7.

This species occurs recent and fossil, fresh-water and marine. Found in a
dredging at Station 28.

Denticula (Kiitz.) Grun.

Denticula elegans Kiitz.

Van Heurck Syn., Pl. 49, figs. 14-16.

Normally fresh-water, this species also occurs iti brackish and marine
gatherings. Found in chains of eight or more frustules in a plankton haul from

Station 43f.

Marine Diatoms 15F

Denticula tenuis Kiitz.

Van Heurck Syn., Pl. 49, figs. 23, 28-30.
_ Although, like the preceding, this fresh-water species occurs in marinega ther-
ings it probably gets there as detritus washed down from adjacent fresh-water
areas. Found also at Station 43f.

Diatoma (DC.) Heib.

Diatoma tenue (Ag.) Kitz.

Van Heurck Syn., Pl. 50, figs. 14, 19.
Found only in plankton haul from Station 21d-f.

Eunotia Ebr.

Eunotia praerupta Ehr. var. laticeps Grun.

Cl. and Grun. Arct. Diat., Pl. 7, fig. 123.

The specimens exactly duplicate the above figure. Found in dredging
from Station 23.

Fragilaria Lyngb.

Fragilaria islandica Grun.
Gran Nord. Plankt., p. 114, fig. 153; Van Heurck Syn., Pl. 45, fig. 37.
Found in plankton hauls from Stations 12b-c, 18d and 460; in the first it is
very abundant, composing almost the entire plankton.

Glyphodesmis Grev.

Glyphodesmis interspiralis Brun. (?)

Pl. I, fig. 5. See Le Diat., I, Pl. 24, fig. 10.

By comparing the figure here given with the one in Le Diatomiste the almost
identical appearance of the two will be seen; but as this species has never before
been found except in fossil beds at Carmacks and Totara, New Zealand, one
cannot but question their identity. Of course there are many fossil forms found
also in a living state, e.g., Navicula Schultzii, but the separation of these two
geographically, as well as chronologically, is exceptional. A certain specious
resemblance exists between this diatom and figures of the so-called ‘‘ Homeo-
cladia Martiana Ag.,’”’ as in Prit. Inf., Pl. 4, fig. 24, and W. Sm. Brit. Diat.,
Pl. 55, fig. 347; but that is a Nitzschia, a quite delicate diatom, well shown in
H. L. Sm. Types, No. 198. Found only in a dredging from Station 48c, a single
specimen.

Gomphonema Ag.

Gomphonema exiguum Kiitz.
Van Heurck Syn., Pl. 25, figs. 34-39.
Found in plankton hauls from Station 43f.

Gomphonema groenlandicum Ostr.
Sch. Atlas, Pl. 213, fig. 40.
Found in two dredgings, from Stations 23 and 43c.

Goniothecium Ebr.

oniothecium Odontella Ehr.
», Ehr. Mikro., Pl. 18, fig. 94; Prit. Infus., Pl. 6, fig. 27.
‘Generally fossil; found at Station 27s.

i6F Canadian Arctic Expedition, 1913-18
Grammatophora Ehr.

Grammatophora arctica Cl.

Van Heurck Syn., Pl. 53 bis., fig. 3.

This is the same as G. antarctica Perag. in Antarct. Exp. France, Pl. 4,
fig. 12. Found at Stations 20b-c and 23.

Grammatophora arcuata Ehr.

Perag. Antarct. Exp. France, Pl. 3, fig. 25; Ehr. Mikro., Pl. 33A, sec. 23,
fig. 11.
More or less plentiful in many of the dredgings, especially in those from

Stations 43a and 43g.

Grammatophora islandica Ehr.

Van Heurck Syn., Pl. 53, fig. 7.
Probably a variety of G. angulosa Ehr. Found at Stations 43a and 438b.

Grammatophora marina Kiitz.
Van Heurck Syn., Pl. 53, figs. 9-13.
Found in the dredging at Station 20g and the plankton haul at Station 12d.

Grammatophora oceanica Ehr. var. macilenta W. Sm.
Perag. Diat. France, Pl. 87, fig. 16.
The markings on this species are exceptionally fine. Found only in the

dredging from Station 27s.

Grammatophora subundulata Grun.
Van Heurck Syn., Pl. 53 bis., fig. 10.
Placed by some authors as a variety of G. marina. Found only in the dredg-

ing from Station 48).

Hantzschia Grun.

Hantzschia amphioxys (Ehr.) Grun.

Van Heurck Syn., Pl. 56, figs. 1-6.

The grounds for separating this from the genus Notzschia, namely its having
the heavy carinal markings on the same side instead of on opposite sides of the
two valves of the individual diatom, is insufficient, but it makes for easier
identification and may therefore be accepted. The present species is generally
fresh-water but.seems to thrive in marine localities. Found only at Station 41.

Hyalodiscus Ehr.

Hyalodiscus hormoides (Mont.) Petit.

Van Heurck Syn., Pl. 84, figs. 8-4; Grun. Diat. F. Jos. Land, Pl. 5, fig. 32.

Grunow without apparent justification names his figure var. glacvalis;
this Gran turns into Lauderia glacialis (Gran Nord. Plankt., p. 23, fig. 23), and’
Jorgensen (Jorg. Protist Plankt., Pl. 6, fig. 7) calls it Podosira glacialis. Without
seeing Gran’s specimens one cannot find a good excuse for making this a Lauderia.
De Toni (Syl. Alg., p. 1361) says it is what is named Hyalodiscus maximus var.
arctica in Cl. and Grun. Types No. 1. Found rather abundantly at Stations
20b-c, 23, 48b and 43c; also what may be a small variety corresponding to the
figure in Sch. Diat. Nordsee, Pl. 3, fig. 40, there confused with ‘“ Podosira
hormoides W. Sm.” which is H. scoticus (Kiitz.) Grun. Compare with Van
Heurck Syn., Pl. 84, figs. 7-8; this small variety occuring at Stations 41 and 43a.

Hyalodiscus laevis Ehr.
Ehr. Mikro., Pl. 33, sec. 15, fig. 17.
Typical specimens were found at Station 48c.

Marine Diatoms 17F

Hyalodiscus scoticus (Kiitz.) Grun.
_ Wan Heurck Syn., Pl. 84, figs. 15-18; Sch. Diat. Nordsee, Pl. 3, fig. 27,
misnamed. .
Found at Stations 20b-c, 20g, 41, 48b and 48c, abundant.

Hyalodiscus subtilis Bail.
Bail. New Spec., Pl. 1, fig. 12; Prit. Inf., Pl. 5, fig. 60, good figure.
Found at Stations 42b and 48a, scarce in both.

Licmophora Ag.

Licmophora Lyngbyei (Kitz.) Grun.

Van Heurck Syn., Pl. 47, fig. 15.

The specimens were all the unimportant variety called var. Pappeana
Grun. in the above reference. Although the markings are coarse they are shallow
and therefore obscure. Found in plankton haul made at Station 43f.

Licmophora tenuis (Kiitz.) Grun.
Van Heurck Syn., Pl. 48, fig. 21; W. Sm. Brit. Diat., Pl. 24, fig. 229, mis-
named. ,
Found in plankton haul made at Station 50b.

Mastogloia Thwaites.

Mastogloia Braunii Grun.
Van Heurck Syn., Pl. 4, figs. 21-24.
Found only at Station 20b-c and there scarce.

Mastogloia Grevillei W. Sm.

Van Heurck Syn., Pl. 4, fig. 20 (compare fig. 18).

M. Grevillei is a fresh-water species; this and the similarity or identity
which some forms show with M. Danseit Thw., a brackish and marine species,
suggests the specimens found may belong to the latter. In a plankton haul
from Station 21d-f. "

Melosira Ag.

Melosira granulata (Ehr.) Ralfs.
Sch. Atlas, Pl. 181, figs. 57-65.
Rather plentiful at Station 29g.

Melosira Heribaudii Brun.
Sch. Atlas, Pl. 182, fig. 23.
Very abundant in dredging from Station 43).

Melosira hyperborea Grun.
Van Heurck Syn., Pl. 85, figs. 83-4; Gran Nord Plankt., p. 18, fig. 4.
Found in three plankton hauls, from Stations 12b-c, 20a and 40d.

Melosira Jurgensii Ag.
Sch. Atlas, Pl. 182, figs. 16, 27-31.
Found at Stations 20b-c, 41, 48a and 43c.

Melosira nummuloides (Bory) Ag.
Sch. Atlas, Pl. 182, figs. 1-2; Van Heurck Syn., Pl. 85, fig. 1.
Found in one dredging, from Station 43c, and in three plankton hauls,

Stations 20a, 40d and 46b.
Melosira sulcata (Ehr.) Kiitz.

Van Heurck Syn., Pl. 91, figs. 15-18, 22-24. :
Placed by many authors in a separate genus, Paralia. Found at Stations

20b-c; 20g, 23 and 48a.
3097-2

=

18F Canadian Arctic Expedition, 1913-18

Melosira Westii W. Sm.
Van Heurck Syn., PI. 91, figs. 11-12.
Found only at Station 43), there rather plentiful.

Navicula Bory

Navicula abbreviata Grun.
Cl. and Grun. Arct. Diat., Pl. 2, fig. 43.
Found only at Station 438c, scarce.

Navicula algida Grun.

Diat. F. Jos. Land, Pl. 1, fig. 31.

Found in dredgings from Stations 23 and 48a, and in a plankton haul from
Station 299.

Navicula aspera Ehr.

Grun. Diat. F. Jos. Land, Pl. 1, fig. 20.

This is by far the most abundant species found, some of the many varietal
phases being present in nearly every gathering, often in great quantity. The
most prominent form is the large variety called N. aspera var. intermedia Grun.
and figured in the above reference. Especially common at Stations 23 and 27s.

Navicula Baculus Cl.

Cl. Vega Diat., Pl. 37, fig. 51.

This should not be considered to be a variety of N. inconspicua Greg. Found
only at Station 29g.

Navicula Baileyana Grun. :
Sch. Atlas, Pl. 6, figs. 26-27; Sch. Diat. Nordsee, Pl. 1, fig. 31. _
The type form occurs at Stations 20b-c and 23, and a variety at 23.

Navicula bipustulata Mann, sp. nov.

Pl. I, fig. 6; also Sch. Atlas, Pl. 46, fig. 67.

Valve linear, quite convex, the rounded apices ending in globular tips; costae
absent at the middle, thereby leaving a wide stauros, at first radial and strongly.
bowed, becoming transverse and straight at the apices, very faintly cross barred;
rhaphe median at the centre but becoming slightly lateral at the apices.

Length 0-047 mm., width 0-008 mm., 8-5 lines in 0-01 mm.

Possibly this is the same asthe unnamed figure in Sch. Atlas above, which
subsequently Grunow suggests is a variety of N. cancellata Donk., to which it
has practically no resemblance; see Donk. Brit. Diat., Pl. 8, fig. 4. Cleve
accepts this with a varietal name, subapiculata. To illustrate the muddled
group that Cleve unites under N. cancellata, compare N. truncata Donk. in
Mic. Journ., 1861, Pl. 1, fig. 4a-b and N. retusa Donk. in fig. 17a-b same plate.
When such dissimilar species are called by the same name diatom taxonomy
loses all value. Found at Station 23.

Navicula bomboides A. Sch.
Sch. Atlas, Pl. 18, fig. 29.
Found at Stations 20b-c and 43a.

Navicula Bombus Ehr.
Sch. Atlas, Pl. 13, figs. 5, 6, 9.
Found only at Station 43a and rather scarce.

Navicula brevis Greg.
Sch. Diat. Nordsee, Pl. 2, figs. 14, 15.
Found at Stations 20b-c, 23, 41, 41¢ and 48g.

Navicula cancellata Donk. var. minuta Grun.
Cl. and Grun. Arct. Diat., Pl. 2, fig. 42.
This is hardly a good variety of N. cancellata. Found at Station 20b-c.

Marine Diatoms 19 F

t

Navicula Claviculus Greg.

Greg. Diat. Clyde, Pl. 9, fig. 5; Sch. Atlas, Pl. 2, fig. 28.
Found in dredging at Station 41, and plankton haul, Station 12d.

Navicula Cluthensis Greg.

Cl. and Grun. Arct. Diat., Pl. 2, fig. 49; Cl. N. and R. Diat., Pl. 2, fig. 13.
Two varieties represented by the above references; var. finmarchiana
Grun. found at Station 41, and var. maculifera Cl., at Station 43c.

Navicula compressicauda A. Sch.

Sch. Atlas, Pl. 46, fig. 62; Sch. Nordsee Diat., Pl. 2, fig. 35.
Found at Station 48a. A very rare species.

Navicula consimilis A. Sch.
Sch. Nordsee Diat., Pl. 2, fig. 46.
Strictly typical forms at Station 41c.

Navicula controversa Mann, nom. nov.

PL. I, fig. 7.

Valve panduriform but only slightly constricted at the middle, thus closely
resembling in outline N. didyma; rows of beading radially arranged throughout,
becoming arcuate toward the two apices; the beads in each row widely separated
and appearing to be strung on thread-like lines, two to four beads in each row
and all near to the outer margin, thereby leaving only the thread-like lines to
continue to the middle; rhaphe strong, straight, bisecting the wide fusiform
median area; central nodule rectangular.

Length 0-079-0-110 mm., width 0-028-0-040; 4-7 to 6 lines in 0-01 mm,

This is identical with the figure in Cl. and Grun. Arct. Diat., Pl. 3, fig. 54
there miscalled N. bomboides var. media (see Sch. Atlas, Pl. 13, figs. 36-38) and
subsequently figured in Grun. Diat. F. Jos. Land, Pl. 1, figs. 38-39, there mis-
called N. subcincta A. Sch. (see Sch. Atlas, Pl. 13, fig. 41 and Pl. 69, fig. 32).
It is abundant in some arctic dredgings, especially at Station 43d. I have found
it also in material of the Shackleton South Polar Expedition, and identical with
the northern specimens except that it averages larger.

Navicula cruciata Cl.
Cl. N. and R. Diat., Pl. 1, fig. 11.
Cleve’s type form came from Greenland. Found at Station 436.

Navicula didyma Ehr.
Sch. Atlas, Pl. 18, fig. 2; Sch. Nordsee Diat., Pl. 1, fig. 7.
Not at all plentiful; found at Station 43c.

Navicula directa W. Sm.

Sch. Atlas, Pl. 47, figs. 3-5; W.Sm. Brit. Diat., Pl. 18, fig. 172.

Found in dredgings from Stations 20b-c, 23, 41, 43a and 436, and in
plankton haul at Station 18d, and generally abundant in all.

Navicula distans (W. Sm.) Ralfs.

W. Sm. Brit. Diat., Pl. 18, fig. 169.

Schmidt’s figures of this species in Atlas, Pl. 46, figs. 11-14, are poor. Found
only at Station 28.

Navicula elliptica Kitz.

Sch. Atlas, Pl. 7, figs. 29-32.

This normally fresh-water species has been reported several times in brack-
ish dredgings. N. subovalis Cl. in Nav. Diat., I, Pl. 1, fig. 27, is a very similar
form of truly marine habitat, but having been found only in New Zealand this
arctic species is probably the above. Found at Station 20g.

3697—3

20F Canadian Arctic Expedition, 1913-18

i

Navicula elongata Grun.
Sch. Nordsee Diat., Pl. 2, fig. 42; Sch. Atlas, Pl. 50, fig. 27 (not 28-29).
There is doubt of this being able to stand alone; Cleve claims it is a variety
of N. Liber W. Sm. Found at Stations 20b-c and 23.

Navicula erosa Cl.

Sch. Atlas, Pl. 259, fig. 7.
Found only at Station 43a and scarce.

Navicula Eudoxia A. Sch.

Sch. Atlas, Pl. 8, figs. 39-40; Pl. 70, fig. 71.

I dissent from Cleve’s making this a variety of N. contigua A. Sch., the type
figure of which is fig. 43 in the above, and his suggestion that all are small,
corroded specimens of N. gemmata Grev. is absurd. Found at Stations 23,
43a and 438g.

Navicula exemta A. Sch.

Sch. Atlas, Pl. 11, fig. 28 (not 29); Sch. Nordsee Diat., Pl. 2, fig. 5.
Found at Station 439. 4

Navicula forcipata Grev.

Sch. Nordsee Diat., Pl. 2, figs. 16, 18; Atlas, Pl. 70, fig. 17.
Found at Station 41.

Navicula fusca Greg.

Sch. Atlas, Pl. 7, figs. 1, 7, 8.
. Only the varietal form shown above, to which is attached the unimportant
“var, delicata A. Sch.,’’ was represented; found at Stations 41, 48a and 43c,
and there frequent.

Navicula Gastrum Ehr. var. Jenisseyensis Grun.

Cl. and Grun. Arct. Diat., Ply 1, fig. 28.

My specimens are duplicates of the above; but that it is an admissable
variety of N.Gastrum will be seen to be doubtful if we compare with authentic
figures of the latter, Ehr. Mikro., Pl. 5, sec. I, fig..12, and Van Heurck Syn.,
Pl. 8, fig. 27. Found at Stations 29g and 43c.

Navicula gelida Grun.
Grun. Diat. F. Jos. Land, Pl. 1, figs. 27-28; Sch. Atlas, Pl. 259, fig. 21.
Found at Stations 20b-c and 23.

Navicula glacialis Cl.

Sch. Atlas, Pl. 6, figs. 37, 39, also fig. 36, no name.

Both the type form (fig. 39) and the variety septentrionalis Cl. (fig. 37),
originals from Spitsbergen, were found; Stations 41, 43b, 43c and 489.

Navicula Grani (Jorg.) Gran.
Jorg. Protist. Plankt., Pl. 7, fig. 25; Gran Nord. Plankt., p. 124, fig. 168.
My specimens were larger than any hitherto recorded, being length 0-082
mm., width 0-011 mm., as compared with 0-054 x 0-0057 mm. Found in
plankton haul at Station 12b-c.

Navicula humerosa Breb.
Sch. Atlas, Pl. 6, figs. 3-5.
Found in plankton haul at Station 18d.

Navicula imperfecta Cl.

Cl. Vega Diat., Pl. 36, fig. 34; Sch. Atlas, Pl. 259, figs. 9-10.

The rhaphe is not bent sidewise at the centre, as seems to be the case in
the above. Found at Station 27s.

Marine Diatoms 21F

Navicula impressa Lager.

Sch. Atlas, Pl. 46, figs. 31-34.

Put by Cleve into N. cancellata Donk. where, like a lot of other forms so
included, it does not belong. Found at Station 438c.

Navicula inconspicua Greg.
Cl. Nav. Diat., I, Pl. 5, fig. 28.
Found at Station 23, scarce.

Navicula incudiformis Cl., see N. transitans var.

Navicula insignificans Mann, sp. nov.

Pl. I, fig. 8.

Valve narrow-lanceolate but with blunt ends; markings strikingly scanty,
consisting of thin, widely spaced costal lines, obscurely cross-barred, on one side
of the valve, and rows of beads, two beads long, on the other side of the valve,
neither reaching to the rhaphe; this slightly tortuous, its outer ends strongly
hooked; central nodule somewhat to one side of the middle.

Length 0-064 mm., width 0-009 mm., 5-7 unbeaded costae and 6 beaded
rows in 0-01 mm.

This sufficiently resembles N. scalifer Brun, in Brun Espec. Nouv., p. 38,
Pl. 15, fig. 4, to suggest its being a variety; but the similarity is not close. This
is a smaller diatom (Brun’s having a length of 0-085 to 0-100 mm.) and that
species is recorded only from the fossil deposit at Sendai, Japan. However,
N. compressicauda occurs in both the North Sea and at Sendai, Japan. The
above also resembles N. mendica Mann in Diat. Philippine Isl., Pl. 23, fig. 3.
Found at Station 41.

Navicula interrupta Kiitz. (not W. Sm.)

Pl. I, fig. 9. Sch. Nordsee Diat., Pl. 1, fig. 8; Sch. Atlas, Pl. 69, fig. 25,
misnamed.

The form here figured and agreeing closely with the references given above
may be a wide variety of Kiitzing’s species, at least as it is broadly represented.
That no one would call it ‘‘interrupted”’ is evident, and in other points it does not
resemble much Kiitzing’s type figure in Kiitz. Bacill., Pl. 29, fig. 93. Their
identity cannot be decided without seeing Kiitzing’s type specimen, for many
of his figures are greatly idealized. I accept the name, however, subject to the
foregoing statement. Found at Stations 20b-c and 438c.

Navicula Kepesii Grun.

Grun. Diat. F. Jos. Land, Pl. 1, fig. 837; Cl. Nav. Diat., I, p. 27.

It is hardly possible to hold this separate from N. directa W.Sm. Found at
Stations 20b-c, 43b and 43c.

Navicula lacrimans A. Sch.

Sch. Atlas, Pl. 12, fig. 61.

I doubt the advantage of Cleve’s renaming this N. gemmulata var. Grunowti
Cl. Found only at Station 43d, scarce.

Navicula lata Breb.
Van Heurck Syn., Pl. 6, figs. 1-2. ; ;
Probably merely a fresh-water interpolation; Station 23.

Navicula Liber W. Sm.

Sch. Atlas, Pl. 50, figs. 16-18.

Although this fine species is variable, Cleve has nearly obliterated its
meaning by uniting with it a host of slightly related forms in Cl. Nav. Diat., I,
p. 54. Found at Station 20b-c.

Navicula longa (Greg.) Ralfs.
Sch. Atlas, Pl. 47, fig. 12, no name; and figs. 8, 9. ; .
This variety is needlessly named N. capensis by Peragallo in Antare. Diat.
France, p. 56. Found at Station 43a.
3697—33

22F Canadian Arctic Expedition, 1913-18

Navicula Lyra Ehr. var. (?)
Sch. Atlas, Pl. 3, fig. 11. ee :
The only example of this common species is the very doubtful variety
above mentioned. Found at Stations 23, 27s, 41 and 43a.

Navicula maculata Bail.

Sch. Atlas, Pl. 6, fig. 38, misnamed, and Pl. 244, fig. 2.
Found at Station 23.

Navicula maxima Greg.

Greg. Diat. Clyde, Pl. 9, fig. 18; Sch. Atlas, Pl. 50, figs. 32-33.

Both the type form and the close variety umbilicata Grun. shown above
occur, the former at Stations 41 and 48c, and the latter at Stations 41 and 430.

Navicula oscitans A. Sch., var. (?)

Sch. Atlas, Pl. 6, fig. 40, unnamed. |

Cleve considers this a variety of N. oscitans, with which it only partly agrees.
Found at Station 41.

Navicula placentula Ehr.
Van Heurck Syn., Pl. 8, fig. 26. ;
Recorded as living in brackish water. Found in a plankton haul, Station
18d.

Navicula plicata Donk.
Donk. Brit. Diat., Pl. 9, fig. 2; Sch. Atlas, Pl. 50, fig. 40, no name.
Found, one specimen, at Station 23.

Navicula protracta Grun.

Cl. and Grun. Arct. Diat., Pl. 2, fig. 38.

Grunow suggests on page 35 above that this may be a variety of N. crucicula
(W. Sm.) Donk. This is not to be accepted; see Donk. Brit. Diat., Pl. 6, fig.
14. Found at Station 23s.

Navicula quadratarea A. Sch.

Sch. Nordsee Diat., Pl. 2, fig. 26; Sch. Atlas, Pl. 260, figs. 31-38, etc.

This essentially arctic diatom is unusually variable, many forms being
represented in the Canadian Arctic Expedition material. Found at Stations
23, 41, 43a, 43b, 43c, and 48g, also in plankton haul at Station 29g.

Navicula rhombica Greg.

Mic. Journ., 1856, Pl. 5, fig. 1; Van Heurck Belgica, Pl. 1, fig. 9.

What is essentially the same diatom Brun calls Schizonema Japonicum in
Brun. Espec. Nouv., Pl. 14, fig. 6. Van Heurck’s specimen is from the Antarctic
and differs considerably from the type. The type form is abundant in the
Arctic, is markedly so at Stations 20b-c, 20g, 23, 27s, 41, 48a and 43.

Navicula rhynchocephala Kitz.

Donk. Brit. Diat., Pl. 6, fig. 4; Van Heurck Syn., Pl. 7, fig. 31; H. L. Sm.
Types 314.

This is generally fresh-water, sometimes marine. Found on beach. at
Bernard harbour, July 15, 1915. The hyaline central area is too large in Van
Heurck’s figure.

Navicula rostellata Greg. (not Kitz.)
Greg. Diat. Clyde, Pl. 9, fig. 20; Sch. Nordsee Diat., Pl. 2, fig. 31, poor.
Found at Station 20b-c. Near N. apiculata Breb., and so placed by De
Toni, Syl. Alg., p. 50, and by Grunow in Sch. Atlas, Pl. 46, note.

Marine Diatoms 23 P

Navicula Schultzii Kain.

Sch. Atlas, Pl. 244, fig. 5.

The type was found fossil in an artesian well boring at Atlantic City, New
Jersey. I found specimens at the Philippine Islands. The form here discovered
Heiden has designated as var. mexicana in the above reference. Found at Station
20b-c.

Navicula scintillans A. Sch.

Sch. Atlas, Pl. 70, fig. 61.

The general appearance of this diatom suggests the genus Mastogloia.
Found at Station 23. It is rather close to varieties of N. glacialis Cl.

Navicula sibirica Grun.

Pl. I, fig. 10. Cl. Nav. Diat., II, p. 29; Cl. Vega Diat., Pl. 37, fig. 38.

In the figure here given, a variety of this species, the apparent border is
due to the vertical curve of the sides. Found at Station 23.

Navicula Smithii Breb.
Sch. Atlas, Pl. 7, figs. 16, 19; Grun. Diat. F. Jos. Land, Pl. 1, fig. 40.
Several forms of this prolific and variable diatom were found; the type
form at Stations 23 and 4l1c, varieties at 20b-c, 43b and 48c, and what Grunow
calls var. borealis in the second reference above at Station 23.

Navicula splendida Greg.

Sch. Atlas, Pl. 13, fig. 31; Pl. 69, fig. 22.

This species is quite abundant; Stations 23, 48a, 43g, and very large and
brilliantly marked specimens at Station 43c.

Navicula subcincta A. Sch., teste Grunow; see N. controversa Mann, nom.
nov.

Navicula suborbicularis Greg.

Sch. Atlas, Pl. 8, figs. 1-6.
Found at Station 430.

Navicula subsalina Donk.

Donk. Brit. Diat., Pl. 4, fig. 2; Van Heurck Syn., Pl. 11, fig. 6.

Found at Station 41. Hardly to be kept separate from N. amphisbaena
Bory. :

Navicula superba Cl.

Cl. Vega Diat., Pl. 36, figs. 23-24.

Found at Stations 23, 41 and 41c, and the var. elliptica (fig. 24 above)
in a plankton haul at Station 40d; my specimen of the last had length 0-058 mm.
See Cl. Nav. Diat., II, p. 29.

Navicula transitans Cl., var. incudiformis Cl.

Cl. Vega Diat., p. 467, Pl. 36, fig. 26.
Found at Stations 20b-c, 23 and 438b.

Navicula trigonocephala Cl. (name pre-empted).

Cl. Vega Diat., Pl. 36, fig. 27; Sch. Atlas, Pl. 259, figs. 17-18.

The name is pre- -empted by (Ehr. ) Ralfs in Prit. Infus. ., p. 909. Found at
Station 29g, plankton haul.

Navicula valida Cl. and Grun.

-Cl. and Grun., Arct. Diat., Pl. 2, fig. 29.
Found at Station 43a.

24F Canadian Arctic Expedition, 1913-18

Navicuila vetula A. Sch. var (?)

Pl. I, fig. 11. Compare Sch. Atlas, Pl. 69, fig. 33, and Pl. 12, fig. 49.

Although this diatom agrees with the above in general outline, in the
longitudinal division of the markings and in the rhaphe area, it appears to be a
coarser form. It also is about the same size as the smaller of the two figures of
Schmidt. Cleve in Nav. Diat., I, p. 85, gives for the larger figure above the
following: length 0-05 mm., width 0-024 mm., 10 lines in 0-01 mm.; my speci-
men gives length 0-032 mm., width 0-016 mm.; 6 lines in 0:01 mm. A new
name may be needed for this form. Found at Station 23.

Nitzschia Hass.

Nitzschia acuta Hantz. ,
Sch. Atlas, Pl. 334, figs. 25-26. }
Found only at Station 27s, there frequent.

Nitzschia distans Greg.
Greg. Diat. Clyde, Pl. 14, fig. 1083; Van Heurck Syn., Pl. 62, figs. 10, 18.
Found only at Station 23.

Nitzschia hungarica Grun.
Van Heurck Syn., Pl. 58, figs. 19-22.
Although usually fresh-water it inhabits brackish localities and is listed in

Cleve’s Arct. Diat. Found at Station 27s, frequent there.

Nitzschia hybrida Grun.
Van Heurck Syn., Pl. 60, fig. 4; Cl. and Grun. Arct. Diat., Pl. 5, fig. 95.
Found at Station 43c, two gatherings.

Nitzschia incurva Grun.

Van Heurck Syn., Pl. 70, figs. 13-14.

As Van Heurck intimates, this may be a variety of N. Lorenziana Grun.
See fig. 12 same plate. Found at Station 20b-c.

Nitzschia insignis Greg.
Van Heurck Syn., Pl. 61, fig. 1; Perag. Diat. France, Pl. 75, figs. 3-12.
Found rather frequently in material from Stations 23, 41, 48a and 43c.

Nitzschia linearis (Ag.) W. Sm.
Sm. Brit. Diat., Pl. 13, fig. 110.
Found at Stations 23 and 27s.

Nitzschia littorea Grun.

Van Heurck Syn., Pl. 59, figs. 21, 25.

It is questionable if anything is gained by uniting this with N. thermalis
(Kitz.) Grun., as is suggested above; compare fig. 20 of the same plate.

Nitzschia longissima (Breb.) Ralfs.

Van Heurck Syn., Pl. 70, figs. 1-4.

Nearly all specimens were very small and delicate, like fig. 3 above. Cleve
and Grunow record this from the Arctic. Found at Stations 20b-c and 43c.

Nitzschia marginulata Grun.
Van Heurck Syn., Pl. 58, figs. 12-15.
Found at Stations 20b-c, 48 b and 48 c.

Nitzschia plana W. Sm.
W. Sm. Brit. Diat., Pl. 15, fig. 114; Van Heurck Syn., Pl. 58, fig. 10.

Scarce and not quite typical; found at Station 23.

Marine Diatoms 25F

Nitzschia polaris Grun.

Grun. Diat. F. Jos. Land, Pl. 1, figs. 62-63.
1 ie in a dredging from Station 29g and a plankton haul from same
ocality.

Nitzschia seriata Cl.
Gran Nord. Plankt., p. 130, fig. 174.
Rather infrequent in two plankton hauls, Stations 12b-c and 422.

Nitzschia Sigma (Kiitz.) W. Sm.

Van Heurck Syn., Pl. 66, figs. 1-9.

The type form occurs but is uncommon; many varieties were found, as.var.
Habirshawii (fig. 4 above) and var. Sigmatella (fig. 6 above). Found at Stations
20b-c, 41, 43b, 43c.

Nitzschia socialis Greg. var. Kariana Grun.
Cl. and Grun. Arct. Diat., Pl. 6, fig. 108.
Found at Station 23.

Nitzschia Weissflosii Grun.
Perag. Diat. France, Pl. 76, figs. 3-4.
Only one specimen found, Station 41.

Plagiogramma Grev.

Plagiogramma Gregorianum Grev.
Perag. Diat. France, Pl. 82, fig. 7; Micro. Journ., 1859, Pl. 10, figs. 1-2.
Some authors change this to P. staurophrum (Greg) .Heib., perhaps correctly;
see Greg. Diat. Clyde, p. 497, Pl. 10, fig. 37 and De T. Syl. Alg., p. 718.
Found at Stations 20b-c and 27s, scarce.

Pleurosigma W. Sm.

Pleurosigma angulatum W. Sm.

W. Sm. Brit. Diat., Pl. 21, fig. 205; Perag. Pleuro., Pl. 5, figs. 3-5.

This common species is here uncommon; only a rare specimen in one
dredging, Station 29g.

Pleurosigma balticum (Ehr.) W. Sm.

W. Sm. Brit. Diat., Pl. 22, fig. 207; Perag. Pleuro., Pl. 7, fig. 20.

Rather abundant, especially at Stations 20b-c, 23 and 27s, large and typical
specimens.

Pleurosigma Fasciola (Ehr.) W. Sm. var. sulcata Grun.

Cl. and Grun. Arct. Diat., Pl. 4, fig. 75.

This seems to be a strictly polar variation of the type. Found at Station
23.

Pleurosigma formosum W. Sm.
W. Sm. Brit. Diat., Pl. 20, fig. 195; Perag. Pleuro., Pl. 1, figs. 1, 6.
All the specimens below normal size; only in one dredging, Station 20b-c.

Pleurosigma glaciale Cl.
Cl. Vega Diat., Pl. 35, fig. 18, see p. 476. ;
Found in plankton haul at Station 29g. Length of my specimen 0-13 mm.

Pleurosigma Grundlerii Grun.

Perag. Pleuro., Pl. 6, fig. 1.

It is rather close to P. rigidum W. Sm. See other figures on same plate.
Found only at Station 23.

26 F Canadian Arctic Expedition, 1913-18

Pleurosigma lineare Grun.

Perag. Pleuro., Pl. 9, fig. 11; Pl. 7, fig. 16, misnamed; Cl. N. and R. Diat.,
Pl. 1, fig. 8, misnamed. mere

Not to be confused with P. tenuissimum W. Sm. Rhaphe line in first tefer-
ence above incorrect.

Found at Station 430.

Pleurosigma longum Cl.
Cl. and Grun. Arct. Diat., p. 49, Pl. 3, fig. 71; Perag. Pleuro., Pl. 2, fig. 2.
One specimen measured was about 15 times as long as wide, namely length
0-45 mm., width 0-031 mm., and suggesting var. kerguelense Grun. in Perag.
Pleuro., Pl. 2, fig. 1, but without the lunate curves at the ends of rhaphe. Found
at Stations 23 and 438c.

Pleurosigma Normanii Ralfs.

Perag. Pleuro., Pl. 4, fig. 6, misnamed.

This is not to be confused with P. affine Grun., as is done by Peragallo.
Found at Station 20b-c.

Pleurosigma Parkerii Harrison.

Perag. Pleuro., Pl. 8, fig. 33.
One specimen at Station 27s.

Pleurosigma speciosum W. Sm. var. gracilis Perag.
Perag. Pleuro., Pl. 2, fig. 19.
Found at Station 23.

Pleurosigma strigosum W. Sm.

W. Sm. Brit. Diat., Pl. 21, fig. 203; Perag. Pleuro., Pl. 5, fig. 1.

My specimens are nearer Peragallo’s figure than the type shown by Smith.
In form it closely resembles the untypical P. Stuxbergit in Grun. Diat. F. Jos.
Land, Pl. 1, fig. 57, but the markings are coarser. Found at Stations 23 and
43.

Pleurosigma tenuissimum W. Sm.
W. Sm. Brit. Diat., Pl. 22, fig. 213; Cl. and Grun. Arct. Diat., p. 58, Pl. 4,
fig. 77.
‘ Both the type form, first reference above, and the var. hyperborea Grun.,
second reference above, were found in the same dredging, Station 20b-c.

Pleurosigma Wansbeckii Donk.

Micro Journ., 1858, Pl. 8, fig. 7; Perag. Pleuro., Pl. 7, figs. 23, 24.

This should not be confused with P. balticum W. Sm. Found at Stations
20b-c and 48c, plentiful in the former.

Pseudo-Amphiprora Stauroptera (Bail.) Cl., see Tropidoneis Stauroptera
(Bail.) V. H.

Pseudo-Eunotia Grun.

Pseudo-Eunotia Larva Mann, sp. nov.
Pl. I fig. 12.
Valve arcuate, broad, its dorsal side evenly and strongly convex, its ventral
side barely concave; ends blunt, rounded; markings of closely set rows of
strong beads, generally transverse, slightly curved toward the apices; the
beading close to the apices less developed, thereby giving a false semi-hyaline:
appearance, somewhat overemphasized in the illustration.
Length 0-037 mm., width 0-007 mm.,:11-2 lines in 0-01 mm.
Scarce, found only at Station 43a.

Marine Diatoms 27F

Rhabdonema Kitz.

Rhabdonema adriaticum Kiitz.
Sch. Atlas, Pl. 217, fig. 17-26; Van Heurck Syn., Pl. 54, figs. 11-13.
Very prolific at Stations 23 and 43a.

Rhabdonema arcuatum Kitz.
Sch. Atlas, Pl. 220, fig. 17-26.
Found at Stations 23, 43a, 43b, 43c and 41.

Rhabdonema minutum Kiitz.
Van Heurck Syn., Pl. 54, fig. 17-21.
Found at Stations 41, 48a, 4386 and 438c, generally abundant; typical at 43a.

Rhabdonema Torellii Cl.
Sch. Atlas, Pl. 218, figs. 18-20; Cl. Arct. Diat., Pl. 4, fig. 20.
The above two illustrations are given to show that R. Japonicum Brun can
aoe be separated from this, but is probably merely a fossil variety. Found at
tation 23.

Rhizosolenia Ehr.

Rhizosolenia styliformis Bright.
Perag. Rhizo., Pl. 4, figs. 1-5.
Found in two plankton hauls, Stations 6b and 12d, there very abundant.

Rhoicosigma Grun.

Rhoicosigma mediterraneanum Cl.
Perag. Pleuro., Pl. 9, figs. 28-31; Cl. N. and R. Diat., Pl. 1, fig. 9.
My specimens are small and otherwise not quite typical. Found at stations
20b-c.

Rhoicosphenia Grun.

Rhoicosphenia curvata (Kiitz.) Grun.
Van Heurck Syn., Pl. 26, figs. 1-4.
Found abundantly at Stations 20b-c, 41, 41c and 430.

Rhopalodia Miller

Rhopalodia gibba (Kiitz.) O. Mull.
Sch. Atlas, Pl. 253, figs. 1-17; Van Heurck Syn., Pl. 32, figs. 1-5.
Found only at Station 43c.

Sceptroneis Ehr.

Sceptroneis gemmata Grun.
Van Heurck Syn., Pl. 37, fig. 3. ;
Van Heurck, in Treat., p. 332, makes this Grunoviella gemmata (Grun.) V.

H. Found at Station 43a.
Scoliopleura Grun.

Scoliopleura latestriata (Breb.) Grun.
Sch. Atlas, Pl. 261, figs. 4-5, misnamed; Van Heurck Syn., Pl. 17, fig. 12.

Found at Station 23, scarce. eR

Scoliopleura tumida (Breb.) Rab. |
-- Sch. Atlas, Pl. 262, figs: 1-6; Van Heurck Syn., Pl. 17, figs. 11, 13. °
Found at Station 43a, also scarce. i

28 F Canadian Arctic Expedition, 1918-18

Stauroneis Ebr.
Stauroneis anceps Ehr.
Van Heurck Syn., Pl. 4, figs. 4-5. ; ; ;
Although the members of this genus belong in reality to N. avicula the
generic name Stauroneis is retained by most authors for convenience, but not as
indicating a scientific generic division. Beach at Bernard harbour, July 15, 1915.

Stauroneis spicula Dickie.
Perag. Diat. France, Pl. 7, fig. 30.
Found at Station 27s, scarce.

Surirella Turp.

Surirella folialifera Mann, sp. nov.

PL. I, fig. 13. a

Valve broad, ovate, robust; rim massive, winged; costae beginning at the
margin in leaf-shaped plates, which are strongly striped longitudinally, and
from the inner ends of which the costae extend as narrow lines or ridges to the
inconspicuous median area; polar space at the blunt end of the value evident.

Length 0-056 mm., width 0-033 mm. Only two specimens found, at
Station 20b-c.

Surirella insignis Ostr.

Ostr. Diat. N.E. Greenland, p. 216, Pl. 18, fig. 19; Sch. Atlas, Pl. 21, fig. 15,
no name. .

This species seems to be rare. Several fine specimens were found, Station
23, in two gatherings.

Surirella striatula Turp.
Sch. Atlas, Pl. 24, figs. 18, 20-21; Van Heurck Syn., Pl. 72, figs. 5-6.
Scarce, Station 43g; usually a very prolific species.

Synedra Ehr.

Synedra affinis Kiitz. var. gracilis (Kitz.) Grun.
Van Heurck Syn., Pl. 41, fig. 150.
Found at Stations 20b-c and 436, abundant in both.

Synedra arctica Grun. (not O’Me.).

Grun. Oster. Diat., p. 401, Pl. 8, fig. 3.

Average length of my specimens 0-099 mm., average width 0-004 mm.
Found in plankton haul at Station 43f.

Synedra kamtschatica Grun. (?)

Cl. and Grun. Arct. Diat., Pl. 6, figs. 111-113.

My specimens have the wide hyaline space at the middle and agree in
general with the above, except that the marginal lines are much shorter. They
are similar to ‘‘Thalassionema gelida Perag.” in Perag. Antarct. Exp. France,
Pl. 3, fig. 10, which is a Synedra. Very common at Station 20g.

Synedra pulchella Kitz.

Van Heurck Syn., Pl. 41, figs. 1-5.

The species is normally fresh-water, sometimes brackish. Found abundant
at Station 23.

Thalassiosira Cl.

Thalassiosira gravida Cl.

Gran. Nord. Plankt., p. 18, fig. 12.

Found in plankton hauls at Stations 6b, 12d, 18d and 25b-c, common in all,
2specially the last.

Marine Diatoms 29F

Trigonium Cl.

oe a discussion of the need for this genus see Mann, Diat. Alb. Voyages,
p. 289.

Trigonium arcticum (Bright.) Cl.

Sch. Atlas, Pl. 79, figs. 5-7.

This massive diatom is common in all arctic waters. An identical form,
except in general of larger size, isequally common in the Antarctic; its name is

unnecessarily changed to T. antarcticum. Found at Stations 41, 43a, 43b, 43c
and 43g.

Trigonium formosum (Bright.) Cl.

Sch. Atlas, Pl. 79, figs. 2-3.
To be held separate from the former. Found at Station 43c¢, scarce.

Tropidoneis Cl.

Tropidoneis elegans (W. Sm.) Cl.
Greg. Diat. Clyde, Pl. 12, fig. 58; Perag. Diat. France, Pl. 41, figs. 2- 6.
Found only at Station 43a, and scarce.

Tropidoneis Lepidoptera (Greg.) Cl.

Van Heurck Syn., Pl. 22, figs. 2-3; Perag. Diat. France, Pl. 39, figs. 1-9.
Found at Stations 20b-c and 43c, scarce in both.

Tropidoneis Stauroptera (Bail.) V. H

Van Heurck Treat., p. 263; Cl. Arct. Diat., Pl. 3, fig. 13, misnamed; Greg.
Diat. Clyde, Pl. 12, fig. 59c, misnamed.

Cleve failed to see the fitness of his genus T'ropidoneis for this diatom and

proposed the unnecessary new genus Pseudo-Amphiprora. Found at Stations
23, 41, 48b and 48c; scarce in all.

Smithsonian Institution, United States National Museum, Washington, D.C.,
May, 1925.

30 F Canadian Arctic Expedition, 1913-18

BIBLIOGRAPHY (Works cited in report)

Baitey, J. W. and Harvey, W. H. ;

1874. United States Exploring Expedition (Wilkes Expedition) Vol. 17,

Cryptogamia—Algae—by J. W. Bailey and W. H. Harvey, 1874.
Baitey, J. W. ,

1842. American Bacillaria, Am. Journ. Sci. and Arts, 1842. :

1854. Notes on New Species and Localities of Microscopical Organisms,
Smithsonian Contributions to Knowledge, Vol. 7, 1854.

Brépisson, A.

1854-1867. Diatomées de Cherbourg, Mémoires Soc. Sci. Nat. Cherbourg,
1st edition, Cherbourg, 1854 and 2nd edition, Paris, 1867. (Diatomées
marines du Littoral de Cherbourg).

Brun, Jacg.

1891. Diatomées Espéces Nouvelles, Marines, Fossiles ou Pelagiques.
Mémoires de la Société de Physique et d’Histoire naturelle de Généve,
1891, Tome 31, Part 2, No. 1.

Broun, Jacq. and TEMPERE, J.

1889. Diatomées Fossiles du Japon, Mémoires de la Société de Physique et

d’Histoire naturelle de Généve, 1889, Tome 30, No. 9.
CuEvE, P. T.

1864. Diatomaceer fran Spetsbergen, Kongl. Svenska Vet.-Akad. Forhand.,
No. 10, 1864.

1873. On Diatoms from the Arctic Sea, Bihang till Kongl. Svenska Vet.-
Akad. Handlingar, Band 1, No. 13. (Communication to the Royal
Swedish Academy of Sciences, March 12, 1873.

1881. New and Rare Diatoms, Kongl. Svenska Vet.-Akad. Hand., Bd. 18,
1881.

1883. Diatoms collected during the Expedition of the Vega. From Nord-
enskiold, A. E.—Vega Expeditionen, 3: 455-517, Pls. 35-38, 1883.

1895. Synopsis of the Naviculoid Diatoms. Kongl. Svenska Vetenskaps-
Akademiens Handlingar, Band 27, No. 3, Stockholm, 1895. Part 2.

CuEvE, P. T. and Grunow, A.
1880. Beitrige zur Kenntniss der Arctischen Diatomeen. Kongl. Svenska
Vetenskaps-Akademiens Handlingar, Band 17, No. 2, 1880.
Dusy, J.
Analysis of the Diatomaceous Genus Campylodiscus.
DeTont, J. B.
1891. Sylloge Algarum, Vol. 2, Patavii, 1891.

Donkin, A.
1858, 1861. On the Marine Diatomaceae of Northumberland, Mic. Journ.,
1858, 1861.

1871. British Diatomaceae. Journ. Roy. Mic. Soc., 1871.
EHRENBERG, C. G.

1854. Mikrogeologie, 1854.
Gran, H. H.

1905. Nordisches Plankton, XIX. Diatomeen. 1905.

GREGORY, WM.
1857. On new forms of Marine Diatomaceae, found in the Firth of Clyde
and in Loch Fyne. Trans. Roy. Soc. Edinb., Vol. 21, 1857.
Grunow, A.
1884. Die Diatomeen von Franz Josephs Land. Denkschriften der Kaiser-
lichen Akademie der Wissenschaften, Wien, 1884.
JANISCH, C.
1888. Diatoms of the Gazelle Expedition. (Pub. in Manuscript only, 1888).

Marine. Diatoms 31F

JORGENSEN, FE.
‘1905. The Protist Plankton and the Diatoms in Bottom Samples. Hydro-
graphical and Biological Investigations in Norwegian Fiords, Bergens
Museum, Perens 1905.
Ktrtzine, F. T.
1844, 1865. Hacillarien oder Diatomeen. Nordhausen.

Le Diatomiste
1890-1896. Serial Publication.

Mann, ALBERT
1907. Report on the Diatoms of the Albatross Voyages in the Pacific Ocean
1888-1904. Smithsonian Institution, United States National Museum.
Contributions from the U.S. National herbarium, Vol. x, pt. 5. Bull.
U.S. Nat. Mus. Issued July 11, 1907.
1925. Marine Diatoms of the Philippine Islands, June, 1925, U.S. National
Museum Bulletin No. 100, Vol. 6, Part 1.

M icroscopical Journal ;
1856, 1857, 1861. Serial publication.

OstRuP, Ernst.
1910. Diatoms from North-East Greenland. Danmark-Expeditionen til
Groenlands Nordgstkyst 1906-1908, Bind 3, Nr. 10, 1910.

Prracauto, H. and M.
1890-1891. Monographe du genre Pleurosigma. (Extract from ‘Le
Diatomiste’’) Paris, 1890-1891.
1892. Monographe du genre Rhizosolenia. (Extract from ‘Le Diatomiste’’)
Paris, 1892.
1897-1908. Diatomées marines de France, 1897-1908.
1908. Expédition antarctique francaise, 1903-1905. Paris, 1908.
1921. Deuxiéme Expédition antarctique frangaise, 1908-1910. Paris, 1921.
PRITCHARD, A.
1861. A History of the Infusoria. London, 1861.
Ratrs, J.
1861. See Section on Diatomaceae in Pritchard’s Infusoria. (Above
‘citation). :
Ratrray, J.
1890. A Revision of the Genus Actinocyclus. Journ. Quek. Mic. Club,
~1890.
ScumiptT, A.
1874. Die in den Grundproben der Nordseefahrt enthaltenen Diatoma-
ceen. Berlin, 1874.
1885. Atlas Der Diatomaceen-Kunde. 1885—(Continued under other
authors).
Smitu, WM. :
1853-1856. A Synopsis of the British Diatomaceae. London, 1853, 1856.
Situ, H. L.
1874. Types, (Species Diatomacearum Typicae Studiis) Geneva, N.Y.,
1874.
TEMPERE and Brun.
"1891. See under Brun (Diatoms of Japan).
Van Huurcs, H.
- 1880-1885. Synopsis des Diatomées de Belgique. Anvers, 1880-1885.
1896. A Treatise on the Diatomaceae (Translated by Wynne E. Baxter)
London, 1896. :
1909. Résultats du Voyage du S. Y. Belgica (1897-1899). Botanique,
Diatomées. Expédition antarctique belge. Anvers, 1909.

32F

Fig.

OonMON Aa F wWN

Canadian Arctic Expedition, 1913-18

EXPLANATION OF FIGURES

. Achnanthes rhombica Ostr. (upper valve)... .

. Achnanthes rhombica Ostr. (lower valve)... ......
. Amphora excludens Mann, sp. nov..... .......
. Cocconeis kamchatkiensis Mann, sp. nov.......

. Glyphodesmis interspiralis Brun. (?)........

. Navicula bipustulata Mann, sp. nov.......

Navicula controversa Mann, nom. nov...

. Navicula insignificans Mann, sp. nov........

. Navicula interrupta Kitz. (not W. Sm.)..........
10.
11.
12.
13.

Navicula sibirica Grun..............
Navicula vetula A. Sch. var. (?)......
Pseudo-Eunotia Larva Mann, sp. nov.....

Surirella folialifera Mann, sp. nov........

1090
1090
510
1010
520
1110
500
1110
1000
710
1120
1110
1090

PLATE 1

MARINE DIATOMS

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Puate II.

Marine Diatoms

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Report of the Canadian Arctic Expedition, 1913-18

VOLUME VIII: MOLLUSKS, ECHINODERMS, COELENTERATES, ETC.

Part A: MOIT USKS, RECENT AND PLEISTOCENE, ‘By William “yt ti
. ‘saued September 24, 1919
MOLLUSKS (Supplementary H. Dall. 2eecaoeceeaces obs ed N 27, 1924).
Part B: CEPHALOPODA AND PHiROPOBAY : = ae 2
_Praropodas es ee eda
teropoda: By W. Dall as aimee wa Seats

Part D: BRYOZOA. ‘By B.C!O shunts EW aR cseeers
Part E: ROTATORIA,. By H. K. Harring.....

ie ual dep 6, 1925):

Paguad February 20, 1. 928).
(Iseued December $1, 1981).

Part F: CHAETOGNATHA. By A. GG, FUntstan, occa bcs sis case sie diss viasieie's. vic o'etlls » (In preparation).
Part G: ALCYONARIA AND AGTINARIA . By ‘ALE. Useued April 28, 1922).
Part H: MEDUSAE AND CTENOPHORA. By H. ‘B. Bielo ow. . (Issued June 80, 1920)...
Part I; HYDROIDS. By C. McLean Fraser......0..¢.....:006 2 Ussied August 21, 1922).
Part zi PORIFERA. By. A.-Dendy and L. M. Frederick c giaiela SWleraee Came S oaets ‘+. (Issued July 6, 1924).

VOLUME IX.: ANNELIDS, PARASITIC WORMS, EMULOZOANE, ETC.

Part A: OLIGOCHAETA, —: : 2 me
Lumbriculide, By ‘Frank Smith, p me ;

7 Enchytralides. ‘By Paul’ S. Welch............csecesscedeceeecs --Casue, Sontember 29, 1919). :
IN: 5 spssewcres sxe be suas (Issued November 16, 1920).

Part C: HIRUDINEA. BY Ui Pie, MQOTG ya seagisss su ang sds sgiatlls ts gies nroes ent (Issued February 4, 1921).
Part D: GEPHYRBEA. By: Ralph V, eae is Pia dl sca vibe woe ie wa iaciradeaie aiatel . (Issued June 10, 1920).
Part E: SEM ATOR A. Bea ; : .. (Issued April: 7, 1920).~
Part FE: NEMATODA. By N. A. Cobb. ...).......cccccccenccecsescecceneeaeiacsae In ‘preporation).
Part G-H: TREMATODA YND one (iseued February 4, 1921).
Part I: TURBELLARTA. By A. Hassell.............cccceccscccecesccucccsteceeucs (In preparation),
Part J: on ee a Dare aeeet (Issued September 29, 1924).
Part. K ling eee a ee eae oe (In mrenaraliont.
Part L: ~M ; es \eieiaraiardiscbyava Sphesierestiatsteeien ees (In preparation).

Part M: FORAMINIFERA. "By J. fy ‘Cushman,.... es sign Row Gpaiayeistele ajaienays aa tise February 6, 1920). -

!

VOLUME X: HYDROGRAPHY, TIDES, ETC.

Part C: TIDAL REN Y ONS AND RESULTS. By W. Bell Seca (Issued October 1, 1920).
Part D: HYDROGRAPH s vid asses’ apidoew' and fo'ves arzsenssa: exaaysie Bis Sings <O-aHaN BGiadts SeastN RIO sevens dn preparation).

VOLUME XI: GEOLOGY AND GEOGRAPHY

~ Part A: THE GEOLOGY OF. ail ARCTIC. COAST OF CANADA, WEST OF THE KENT
PENINSULA. By J.J. O'Neill... cc. c ccc cccse cece cc eeveesseeeeans (Issued July 8, aD.

Part B: MAPS AND GEOGRAPHICAL NOTES." ‘By Kenneth Cc. Chipman and John
(Issued July 8, 5924).

VOLUME XII: THE COPPER ESKIMOS

Part A: THE LIFE OF THE COPPER ESKIMOS. By D. Jenness....... (Issued Jonuaty 14, 1922).
Part B: ee toe ig Rk ooanelmian OF THE WESTERN AND COPPER
KIM By Di Jennies 2? fuss as sooiaw sgausin-o.gidltrars Sita s wGaee,« wactestecs Teawod May 23, 1923).
Part C: THE OSTHOLOGY Or THE WESTERN’ AN! D CENTRAL ESKIMOS.
: 3 By John - Cameron rr ee er ais sibveyate eateseeeeeseeces Isaued June 28, 1928),

ar

(VOLUME XI: ESKIMO FOLK’-LORE
Babies ESKIMO MYTHS AND TRADITIONS FROM ALASKA, THE MACKENZIE DELTA

AND CORONATION GULF. By D. Jenness...........0..44 (Issued November 16, 1924).

Part B: SLING ene OF THE ESKIMOS. By D. Jouness.... aint peitennes August 8, 1924).
VOLUME XIV: ESKIMO SONGS :
SONGS OF THE COPPER ESKIMOS. By Helen H. Roberts and D, Jenness......... (In ‘press),

» VOLUME XY: ESKIMO LANGUAGE AND TECHNOLOGY

Part A: COMPARATIVE GRAMMAR AND VOCABULARY OF THE ESKIMO DILAECTS
gf soe OnE, THE MACKENZIE DELTA AND eae ar. ed
agar acacia Wier aga 0a, Seba ahacalannr ast B Apc@hS Stel ste ela ’el vio iene 'oseiw-d uo ie 5S ‘nm preparation).

Part B: “TECHNOLOGY OF THE COPPER ESKIMOS. A (To be prepared).
Si VOLUME XVI: ARCHAEOLOGY _
CONTRIBUTIONS TO THE ARCHAEOLOGY OF WESTERN ARCTIC AMERICA,

+ Rawtawad Samed Iie Ld PERS SOWHY RES OL eee her etiaerarers re ee ee (To be prepared).

(Index issued with ae number of dupe Volume :