Iii i
Ireland, Cornwall, Lake District ; France, Sweden, Norway,
Italy, Spitzbergen, Nova Zembla, United States.
Plate X X X IX ., flg. 3. a d . living fronds; i c , empty frond; e, end
view; / , zygospore.
Cosmazium z en lfo zm e . Archer in Journ, Bot. {1874),
Segments reniform, in end view equally elliptic. Zygospore
globose, armed with long spines, which are cleft at the summit.
Siz e . Length 50 ¡ i; diam. 50 g.
Nordstedt Desm. Arct. (1875), p. 40. Wolle Desm. U.S.
(1884), p . 76, t. 14, f. 10, 11.
Cosmarium margaritiferum of authors (in part).
Cosmarium margaritiferum, forma genuina, Nordstedt Norges
Desm. (1873), p. 11.
Cosmarium margaritiferum,y&v.reniforme, Ralfs. Desm. p. 100.
Hab. In ponds.
Cornwall, Lake District ; Norway, Russian Lapland, United
States.
Plate X L I I . , flg. 10. a, living fro n d ; h, empty frond.
Cosmazium L o g ien se . Bisset. Bog. M icr. Journ. (1884), p . 194, t. 5,
/.4 .
Frond of medium size, outline sub-elliptic, one and a half
times as long as broad, deeply constricted, with a narrow linear
sinus, semi-celis more than semi-circular, nearly two-thirds of a
circle ; sometimes with a wide and very shallow depression at
the ends. Cell membrane rough all over with small pearly
granules.
Siz e. Length 70-73 g ; diam. 47-50 g (B.).
H ab. In mountain pools.
Ambleside, &c. (Britain), Scotland.
Plate X L I ., fig. 5. a, living frond; I, empty frond.
Cosmazium p u n c tu la tum . Breb. Liste Lesm. (1856), p. 129, t. 1,
/ . 16.
Frond, about as long as broad, constriction linear, segments
subreniform, clad with small scattered granules, or sometimes
punctate ; end view elliptic.
Zygospore orbicular, elegantly beset with rather short and
thick processes, which are rounded above and margined by a
number of very short, acute spinelets, with a central slender,
elongate, slightly tapering process, bifid or trifid at the extremity.
Size. Length 22-30 g ; diam. 22 g (N.) ; length 24-31 g ;
diam. 20-26 g (Wille) ; diam. 20-30 g (Wo.).
Nordstedt Desm. Spitz. (1872), p. 26, t. 6, f . l (?). Notaris
Desm. Ital. (1867), t. 4, f. 33, left lower flg. Klebs. Desm.
Pruss. (1879), p. 37. Kirchner Alg. Sohles. (1878), p. 148.
Nordst. Norges Desm. (1873), p. 12. Maskell N. Zeal. Desm.
(1882), p. 239. Nordst. Desm. Gronl. (1885), p. 7. Nordst.
Desm. Arct. (1875), p. 17, p. 40. Wille Norges Fers. (1880),
p. 24. Wille Nova Zem. (1879), p. 33. Wittr. Sottv. Alg.
^ 8 7 2 ), p. 57. Schaarsohm. Magy. Desm. (1883), p. 264.
Petit Desm. Paris (1877), p. 30. Lemaire Desm. Vosg. (1883),
p. 19. Wolle Desm. U.S. (1884), p. 74, t. 13, f. 4.
H ab. In pools.
Cornwall, Lake District; France, Germany, Norway, Italy,
Greenland, Hungary, Nova Zembla, Spitzbergen, Russian
Lapland, New Zealand, United States.
Plate X L I I ,, flg. 7. a, living frond; b, empty frond; c, side view ;
d, end view.
Cosmazium o z th o stlch um , Lundell Lesm, Suec. (1871), g . 24, t. 2,
f . 9 .
Medium size, a little longer than broad, deeply constricted,
with a narrow linear sinus, semi-cells subelliptio, broadly rounded
at the ends ; ventral margin straight, granulate, granules in
7-8 series, vertically disposed, end view elliptic, granulate,
smooth in the centre, side view circular.
Size. Length 34-36 g ; diam. 30-33 g (L .) ; diam. 20-30 g
(Wo.).
Nordst. Norges Desm. (1878), p. 11. Wille Norges Fers.
(1880), p. 24. Wolle Desm. U.S. (1884), p. 78, t. 18, f.
4, 5.
H ab. In pools.
Sweden, Norway, United States.
Plate X L I I . , flg. 3. a, living frond ; b, empty frond; c, end view ;
d, side view.
Cosmazium b o tz y tis . Meneg. Syn, Lesm. (1840), p. 220.
Frond rather longer than broad, constriction deep, linear ;
segments twice as broad as long, broadest at base, narrowing
upwards, sides rather rounded, ends truncate, rough all over
with scattered rounded pearly granules ; end view broadly
elliptic. Zygospore orbicular, spinous, spines elongated and
slightly divid^ed at the apex.
Siz e . Length 72 g ; diam. 57 g (D.) ; diam. 35-62 g
(Wo.); length 85 g ; diam. 65 g ; length 68 g ; diam. 52 g
(C).R
alfs. Ann. Nat. Hist. (1844), xiv., p. 393, t. 11, f. 5. Ralfs.
Desm. (1848), p. 99, t. 16, f. 1. Archer in Prit. Inf. (1861),
I