A
kiM ; i î' I
’H
-
(1871), p. 44. Nordstedt Norges Desm. (1873), p. 21. Grunow
Desm. Austr. (1858), p. 501. Wood P. Wate r Alg®
U.S. (1872), p. 131. Wolle Desm. U.S. (1884), p. 60, t. 16,
f. 21, 22. Brebisson Liste Desm. (1856), p. 126. Rabb.
Alg. Eur. (1868), p. 163 (sine var. b). Wille Nov. Sem.
(1879), p. 44. Nordstedt Desm. Spitz. (1872), p. 29. Kircb-
n e r Alg. Schles. (1878), p. 147. Lemaire Desm. Voser.
(1883), p . 21.
Heterocarpella hioculata, Breb. Alg. Fal. (1835), p. 56, t. 7.
Cosmarium Phaseolus b. bioculatum, Klehs. Desm. Pruss.
(1879), p . 36.
H ab. In ponds, ditches, &c.
Widely distributed through England, Wales, Scotland;
France, Germany, Norway, Spitzbergen, Sweden, Nova
Zembla, Hungary, United States.
Plate X X X V I I ., fig. 6. a, living frond ; i, empty frond; c, side
view ; d, end view ; e, zygospore.
Cosmazium t in c tum . Balfs. Lesm. (1848), p. 95, t. 32, f . 7.
Frond very minute, about as long as broad, constriction
producing an acute notch a t each s id e ; segments elliptic,
about twice as broad as long, smooth; end view narrow,
elliptic. Empty frond somewhat reddish; zygospore quadrate,
smooth.
S iz e . Diam. 10-15 g (W.) ; length 12 g ; diam. 10 g
(Wille.)
Kiroh. Alg. Schles. (1878), p. 148. Archer in P rit. Inf.
(1861), p. 731. Lundell Desm. Suec. (1871), p. 44. Nordstedt
Norges Desm. (1873), 21. Grunow Desm. Austr.
(1858), p. 498. Nordst. & W ittr. Desm. Ital. (1876), p. 35.
Brebisson Liste Desm. (1856), p. 127. Wille Norges. Alg.
(1872), p. 36. Wille Nov-. Sem. (1879), p. 44. Klebs. Desm.
Pruss. (1879), p. 36, t. 3, fig. 46. Jacobsen Desm. Denm.
(1874), p. 200. Wolle Desm. U.S. (1884), p. 61, t. 16, f. 31.
Sohaarschm. Magy. Desm. (1882), p. 270. Lemaire Desm.
Vosg. (1883), p. 21.
Sphcerozosma tinctum, Eabh. Alg. Eur. (1868), p. 160.
P e tit Liste Desm. Paris (1 8 7 ^ , p. 29.
H ab. In ditches, ponds, &c.
Sussex, Cornwall, W a le s ; Prance, Germany, Sweden,
Norway, Denmark, Austria, Italy, United States.
Plate X X X V I I ., fig. 7. a, living fronds; 5, empty fronds; c, side
view ; d, zygospore in various stages.
Cosmazium p y gm æ um . Archer Mior. Journ. (1864), iv.,g. 174, t.
6 ./ . 45-49.
Frond very minute, smooth, ra th e r broader th an long,
segments sub-quadrilateral ; end view sub-elliptic, somewhat
inflated a t each side a t the centre. Zygospore ra th e r large,
smooth.
S i z e . Length 8-10 g ; diam. 10-12 g (A.) ; length 9-12 g ;
diam. 11-13 g (W.).
Lundell Desm. Suec. (1871), 43. Nordstedt Norges Desm.
(1873), p. 20. JacobsenDesm. Denm. (1874),p. 198. W ittrook
Sottvat Alg. (1872), p. 61. Lemaire Desm. Vosg.
(1883), p. 21.
Sphærozosma pygmæum, Rahh. Alg. Eur. (1868), p. 150.
Wittrock Scan. Desm. (1869), p. 26.
H ab. On su bm erged p la n ts an d Sphagnum.
Lake D istric t,Ire lan d ; Prance, Sweden, Norway, Denmark.
Plate X X X V I I , fig. 8. a, living frond ; h, empty frond ; e, side
view ; d, end view ; e, zygospore.
Cosmazium t zu n c a te llum . Perty. Lehensf. (1848), p . 209, t. 16,
f i 13.
Small, broader than long, with -a very narrow sinus, at each
pole broadly truncate ; semi-cells transversely oblong-hexagonal,
plane at the base broadly truncate above, sides angular, end
view elliptic. Cell membrane smooth. Zygospore small,
orbicular, thickly beset with minute conical spines.
S i z e . Length 12 g ; diam. 18 g.
Archer Micr. Journ. xiii. (1873), p. 99. Nordstedt Norges
Desm. (1873), p. 17. Eabh. Alg. Eur. (1868), p. 165.
Euastrum truncatellum, Perty. Lebensf. (1848), p. 209.
Hab. I u mountain pools.
Ireland ; Germany, Switzerland, Norway.
Plate X X X V I I . , fig. 9. a, living frond ; i, empty frond ; c, end
view ; d, side view ; e, zygospore.
Cosmazium m in u tiss im um . Archer Quart. Journ. Micr. Sci.
XVII, (1877), p . 194.
Very minute, resembling Sphoerozosma excavatum, but more
minute, and with the sinus a narrow incision. Zygospore ellipsoidal
or oblong, of a purplish, or bronze-like hue, with thick walls.
S i z e .
Sphoerozosma excavatum, Nordst. fi.de Archer in Quart. Journ.
Mic. Sci. xvii. (1877), p. 301.
Hab. In mountain pools.
Ireland ; Italy.
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