Cosmazium N ym a n n ia n um . Orunmo in Eabh. Alg. F ur (1868),
I II., p. 166.
Frond of medium size) outline somewhat hexagonal, delicately
punctate, resembling C. suhlohatwm. Semi-cells rather
b ro ak r thnu long, quadrangular, angles obtuse, sides slightly
repand, single amylaceous granule in the centre of each semicell.
S i z e . Length 44-48 ¡x ; diam. 38-36 g (L.) ; length 5 0 g ;
diam. 36-38 g (W.) .
Nordstedt Norges Desm. (1873), p. 17. Lundell Desm.
Suec. (1871), p. 36, t. 3, f. 1. Archerin Journ. Bot. (1874),
iii., 93. Wolle Desm. U.S. (1884), p. 79. Wille Norges
Alg. (1880), p. 32. Lemaire Desm. Vosg. (1883), p. 20.
H ab. In bogs.
Lake District, Hants, Cornwall. Ireland ; Prance, Germany,
Sweden, Norway, United Sates.
Flate X X X V I ., fig. 6. a, living frond ; b, empty frond.
Cosmazium homalodezmum. Nordst. Desm. A rct. (1875), p. 18,
t. 6, / . 4.
Medium size, about a fifth part longer than broad, deeply
constricted, with a linear sinus, widened at the extremity, semi-
cells trapezoid from a somewhat reniform base, narrowed upwards,
side straight or rather retuse, dorsal margin truncate or
often a little retuse, upper angles obtuse, lower broadly rounded,
end view elliptic-oblong, a little swollen in the middle, side view
ovate, membrane very delicately or indistinctly punctate.
S i z e . Length 54-66 g ; diam. 48-51 g (N.) ; diam. 40 g
(W.).
Wolle Desm. U.S. (1884), p. 81, t. 17, f. 19, 20. Nordst. &
Wittr. Ital. (1876), p. 34. Lemaire Desm. Vosg. (1883), p.
20. *
Cosmarium pyramidatum, forma intermedia, Nordst. Norg.
Desm. (1873), p. 19.
H ab. In ponds.
France, Spitzbergen, Norway, United States.
Flate X X X V I ., fig. 7. a, living frond ; b, empty frond ; c, end
view ; d, side view.
Cosmazium a n c ep s. Lund. Desm. Suec. (1871), p. 48, t. S ,f . 4.
Small, twice as long as broad, oblong, hexagonal, not deeply
constricted, with a narrow linear sinus ; in side view oblong,
slightly emarginate in the middle, and rounded at the poles ;
semi-cells sub-quadrate, attenuated gradually from the base,
83
truncate at the apex, and very slightly emarginate, sides straight,
end view somewhat circular ; cell-membrane smooth ; amylaceous
granule single.
S iz e . Length 32-35 g ; diam. 17-18 g (L.) ; length 45-
50 g ; diam. 17-18 g (W.) ; length 24 g ; diam. 12 g (Wille) ;
length 25-33 g ; diam. 15-20 g (N.).
Lundell Desm. Suec. (1871), p. 48, t. 3, f. 4. Nordstedt Desm.
Greenl. (1885), p. 7. Archer Mior. Journ. (1875), xv., p.
409. Nordstedt Norges Desm. (1873), p. 24. Nordstedt
Desm. Arct. (1875), p. 19, 38. Nordst. & Wittr. Desm. Ital.
(1876), p. 35. Wille Nov. Sem. (1879), p. 39. Nordstedt
Desm. Spitz. (1872), p. 36. Wolle Desm. U.S. (1884), p. 59,
t. 18, f. 11.
H ab. In ponds.
Scotland, Ireland; Spitzbergen, Nova Zembla, Norway,
Sweden, Italy, Greenland, United States.
Fiate X XX V I., fig. 8. a, living frond; b, empty frond; c, side
view ; d, end view.
Cosmazium g zan a tum . Breb. in Balfs. Desm. (1848), p. 96, t. 32,
/ . 6.
Frond minute, somewhat longer than broad, constriction
linear; segments broader than long, rapidly tapering, truncate-
triangular, smooth. Side view compressed, end view elliptic.
S i z e . Length 21 g ; diam. 18 g (D.) ; diam. 20-32 g (W.).
Lemaire Desm. Vosg. (1883), p. 21. Sohaarschm. Magy.
Desm. (1882), p. 269. Nordstedt Desm. Greenl. (1885), p. 7.
Wille Norges Alg. (1880), p. 35. Wittr. Sottvat Alg. (1872),
p. 61. Archer in Prit. Inf. (1861), p. 732. Delponte Desm.
(1878), p. 4, t. 7, f, 16-21. Nordstedt Desm. Arct. (1875),
p. 19, 38. Cleve Sver. Desm. (1864), p. 488. Luudell Desm.
Sueo. (1871), p. 42. Nordstedt Norges Desm. (1878), p. 19.
Petit Liste Desm. Paris (1875), p. 30. Grunow Austr. Desm.
(1858), p. 497. Nordst. & Wittr. Desm. Ital. (1876), p. 32.
Nordstedt Desm. Spitz. (1872), p. 29. Wolle Desm, U.S.
(1884), p. 60, t. 50, f. 13, t. 15, f. 14, 15. Wittrock Scan.
Desm. (1869), p. 12. Brebisson Liste Desm. (1856), p. 126.
Eabh. Alg. Eur. (1868), p. 162. Wille Nov, Sem, (1879),
p. 38. Jacobsen Desm. Denm. (1874), p. 198. Kirchner
Alg. Schles. (1878), p. 147.
Cosmarium granatum a typicum, Klebs. Desm. Pruss. (1879),
p. 32.
H ab. In qniet water.