4, f. 84. Eabh. Alg. Eur. (1868), p. 165. Wille Nov. Sem.
(1879), p. 40. Nordstedt Desm. Spitz. (1872), p. 29. Jacobsen
Desm. Denm. (1874), p. 197 (partly). Kirchner Alg.
Schles. (1878), p. 149.
H ab. In pools and ponds.
Lake District, Cornwall, Hants, Sussex, Wilts, Somerset,
Lancashire, N. Wales, Scotland ; Prance, Germany, Sweden,
Norway, Spitzbergen, Nova Zembla, Greenland, Austria, Hungary,
Italy, United States.
Plate X X X V I I . , fig. 13. a, living frond; b, empty frond ; c, zygospore.
Cosmazium b ic z en a tum . (Nords. Besm. Spitzb.).
Frond minute, differing from G. crenatum in the lateral cre-
nations being binate, and the upper angles without crenations.
Size Length 25 g diam.; 17-18 g (N.) ; length 28 g ;
diam. 20 g (N. & W.).
Joshua Journ. Bot. (1883), xxi., p. 291.
Cosmarium crenatum ft licrenatum, Nordst. Desm. Spitzb.
(1872), p. 30, t. 6, f. 10. Nordst. Norges Desm. (1873), p. 15.
Nordst. & Wittr. Desm. Ital. (1876), p. 35.
H ab. Mountain pools.
Den of Gight ; Norway, Spitzbergen, Italy.
Plate X L I I ., fig. \Z. a, living frond; 5, empty frond j c, end view.
Cosmazium B .e in soh ll. Archer Mior. Jonrn., 1876, t. 16, p. 109.
Frond truncate, elliptical, nearly one-fourth longer than
broad, constriction linear ; segments ovate or semi-elliptic;
ends straiglit, smooth ; sides with three projecting nodules ; end
view elliptic, swollen in the middle.
Size. Length 3 3 g ; diam. 28 g (Ee.) ; diam. 30-35 g (W.).
Wolle Desm. U.S. (1884), p. 68, t. 16, f. 12.
Cosmarium, sp., Eeinsoh Contrib. (1875), t. 18, f. 4.
H ab. In pools.
Penzance, Ireland ; Germany, United States.
Plate X X X V I I , fig. 14. a, living frond; b, empty frond ; e, end
view.
Cosmazium h o lm ien s e . Lund. Besm. Suec. (1871), p. 49, t. 2 , / . 20.
Medium size; twice as long as broad, elliptically rectangular,
constricted, with a narrow linear sinus ; semi-cells sub-quadrate,
gradually attenuated from the base, but slightly dilated at the
apex; sides straight or sub-convex, obsoletely crenulate towards
the apex; apex truncate, obsoletely biundulate, lower angles
DBSMIDIK®:. 97
rounded, upper angles truncately rounded, end view broadly
elliptic, obtuse angled at the poles ; side view rectangularly
elliptic ; apex somewhat truncate, membrane smooth ; amyla^
ceous granule single.
Siz e . Length 63-66 g ; diam. 38-40 g (L.) ; diam. 33 g ;
length 63 g (W.) ; length 58-65 g ; diam. 33-40 g (N.).
Wittr. Sottv. Alg. (1872), p. 60. Nordstedt Norges Desm.
(1873) p. 24. Nordstedt Desm. Arct. (1875), p. 18, 38.
Nordst. & Wittr. Desm. Ita l. (1876), p. 31. Wille Nov Sem.
(1879), p. 36. Nordst. Desm. Gronl. (1885), p. 7. Nordst.
Desm. Spitz. (1872), p. 28. Wolle Desm. U.S. (1884), p.
68, t. 16, f. 23.
H ab. Mountain pools, &c.
Lake District, N. Wales, Scotland; Norway, Spitzbergen,
Nova Zembla, Greenland, Italy, United States,
var. ft. Archer Micr. Journ. xv. (1875), p. 409.
var. m ino z . Archer Micr. Journ. xvi. (1876), p. 344.
Plate X X X V I I , fig. 15. a, living frond; b, empty frond; c, side
view; d, end view.
Cosmazium u n d u la tum . Corda Aim. Carls. (1839), t. 5, f . 26.
Frond small, slightly longer than broad; constriction linear;
segments semi-orbicular, ends and sides broadly rounded, cre-
nate or minutely undulate at margin, end view elliptic. Zygospore
orbicular, spinous; spines elongate, slender, swollen at
the base, and divided at the apex.
S i z e . Length 60 g ; diam_. 4 4 g (K.) ; diam. 40-44 g (W.) ;
length 5 4 g ; diam. 39 g (Wille).
Ealfs. Desm, (1848), p. 97, t. 15, f. 8. Wittr. Sottv. Alg.
p. 59. Archer in Prit. Inf. (1861), p. 732. t. 2, f. 33, 34.
Lundell Desm. Suec. (1871), p. 35. Nordstedt Norges Desm
(1873), p. 15. Nordstedt Desm. Arct. (1875), p. 41. Wood
F. Water Alg® U.S. (1872), p. 132. Wittrock Scan. Desm.
(1869), p. 11. Brebisson Liste Desm. (1856), 127. Rabh.
Alg. Eur. (1868), p. 165. Nordstedt Desm. Spitz. (1872), 32.
Wolle Desm. U.S. (1884), p. 67, t. 16, f. 20. Wille Norges
Desm. (1880), p. 27. Sohaarschm. Magy. Desm. (1882), p.
265. Jacobsen Desm. Denm. (1874), p. 197. Kirclmer Alg.
Schles. (1878), p. 149. Maskell N. Zeal. Desm. (1882), p. 242.
H ab. Mountain pools.
Lake District, Cornwall, Bristol, Sussex, N. Wales ; France,
Germany, Austria, Denmark, Norway, Sweden, Russian Laplaud,
Hungary, Bohemia, Spitzbergen, United States, New Zealand.
Plate X X X V I I ., fig. 16. a, living frond ; b, empty frond; c, scmi-
oell further magnified; d, end view ; e, zygospore. ^
' j k ;
. I. ..