C o sm a rium te n u e . Archer Micr. Journ. (1868), vni., p. 293.
Minute, semi-oells elliptic, constriction deep and linear, end
view elliptic. Cell membrane smooth. Zygospore globose,
smooth (quite destitute of spines).
Siz e . No dimensions given. Larger than C. tinctum.
H ab. In pools.
Ireland.
C o sm a z ium la s io sp o zum . Arch. Micr. Journ. xix. (1879), p. 123.
Very minute (scarcely so large as 0. tinctum'). Sinus linear.
Semi-cells flattened at the apex. Zygospore globose, beset
with extremely minute fine and pointed spines.
Siz e . (Not stated).
H ab. In pools.
Ireland.
C o sm a z ium e x ig u um . Archer Micr. Journ. (1864), iv., p . 178,
t. 6, figs. 32-33.
Frond very minute, smooth, oblong, rather more than twice
as long as broad; segments sub-quadrate; starch granule
single central.
Siz e . Length 25 g ; diam 12 g (A.).
Lundell Desm. Suec. (1871), p. 43. Rabh. Alg. Eur.
(1868), p. 164. Wille Norges. Alg. (1880), p. 81, t. 1, f. 14.
H ab. In pools.
Ireland ; Scotland.
Plate X L I I I . , fig. 4. a a, living fronds ; h 6, empty fronds; c, side
view.
C o sm a z ium S c h lie p h a c k ia n um . Grunow in Babh. Alg. Fur.
(1868), p. 167.
Minute, outline sub-quadrate, broader than long, even
deeply-constricted. Semi-cells furnished with a small basal
tumour, depressed, broadly truncate above or plano-convex,
angles and sides rounded.
Siz e . Diam 12 g (W .).
Archer in Micr. Journ. (1876), xvi., p. 338. Wille Nov.
Sem. (1879), p. 46. Kirchner Alg. Schles. (1878), p. 158.
Wolle Desm. U.S. (1884), p. 82, t. 18. f. 14, 15.
var. S p itz b e z g e n s is . Nordst. Lesm. Arct. (1875), p . 24, t. 7 ,/ . 15.
H ab. Amongst Sphagnum.
Scotland, Ireland; Spitzbergen, Nova Zembla, United States.
Plate X X X V I I . , fig. 10. a, living frond; b, empty frond; c, side
view; d, zygospore; e, end view; / , side view.
93
** Margins o f segments crenate or slightly undulate, surface
not granulate.
Cosmazium Iffleneghinii. Breb. in Balfs, Lesm. (1848), p. 96, t.
XV., / . 6 .
Frond very minute, rather longer than broad ; constriction
linear ; segments subquadrate, bicrenate at the sides and ends ;
smooth, end view elliptic.
S i z e . Length 18 g ; diam. 14 g (D.) ; length 24-34 g ;
diam. 20-22 g (K.) ; diam. 20-22 g (W .).
Wittr. Sottv. Alg. (1872), p. 59. Archer in Prit. Inf.
(1861), p. 732. De Bary Conjug. (1858), p. 72, t. 7, f. 35-
46. Delponte Desm. (1878), p. 2, t. 7, f. 5-9. Cleve Sver.
Desm. (1864), p. 488. Wille Norges Desm. (1880), p. 30.
Lundell Desm. Suec. (1871), p. 43. Nordstedt Norges Desm.
(1873), p. 20. Nordstedt Desm. Arct. (1875), p. 40. Petit
Liste Desm. Paris (1877), p. 30. Wood F. Water Alg® U.S.
(1872), p. 131. Wolle Desm. U.S. (1884), p. 65, t. 16, f. 2.
Wittrock Scan. Desm. (1869), p. 12. Brebisson Liste Desm.
(1856), p. 127. Eabh. Alg. Eur. (1868), p. 163. Wille
Nov. Sem. (1879), p. 43. Jacobsen Desm. Denm. (1874), p.
197. Kirchner Alg. Schles. (1878), p. 148. Sohaarsclim.
Bosn. Serv. (1883), p. 7. Sohaarschm. Magy. Desm. (1882),
p . 270.
Cosmarium bioculatum, Meneg. Syn. Desm. (1840), p. 220.
Euastrum crenulatum, Nag. Einz. Alg. (1849), t. 7a, f. la-d.
De Not. Desm. Ital. (1867), t. 3, f. 25.
H ab. In pools.
Cornwall, Lake District, Sussex, Hants, Kent, Surrey, North
Wales ; France, Germany, Italy, Norway, Sweden, Hungary,
Russian Lapland, Nova Zembla, United States.
Plate X X X V I I . , fig. 11. a, living fronds; b, empty fronds; c,
end view.
Cosmazium a n g u lo sum . Breb. Liste, p. 127, t. 1, f . 17.
Frond minute, rather longer than broad, constricted in the
middle, with a linear sinus ; segments quadrate ; angles rather
obtuse.
S i z e . Length 28 g ; diam. 18 g (K.).
Euastrum angulosum, Breb. Liste (1856), p. 127.
Cosmarium Meneghina v. angulosum, Kirchn, Alg. Schles., p.
148. Rabh. Alg. Eur., iii., 163. Wolle Desm. U.S. (1884),
p. 65. Lund. Desm. Suec. (1871), p. 43. Wille Norges
Desm. (1880), p. 30. Wittr. Sottv. Alg. (1872), p. 59.
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