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il ■
lit: I
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var. obsoletum.
Semi-cells more rounded than in the type.
H ab. Ill ponds.
North Wales ; Norway, United States.
Plate X L I I ; fig. 15. a, living frond ; i, empty frond ¡ c, end view; d,
side view.
Cosmarium p h a se o lu s . Breh. in Meneg. Besm. (1840), jp. 220,
Frond in front view about as long as broad, constriction
deep, lin e a r; segments reniform, smooth, end view elliptic,
with a slight conical projection a t each side.
Size. Length 30 g; diam. 33 g.
Ralfs. Desm. (1848), p. 106, t. 32, f. 5. Archer in P rit.
Inf. (1861), p. 732. Nordstedt Desm. Arct. (1875), p. 24.
Cleve Sver. Desm. (1864), p. 488. Nordstedt Norges Desm.
(1873), p. 17. P e tit Liste Desm. Paris (1877), p. 30.
Wittrock Scan. Desm. (1869), p. 14. Brebisson Liste Desm.
(1856), p. 131. Eabh. Alg. Eur. (1868), p. 166. Jacobsen
Desm. Denm. (1874), p. 200. Wolle Desm. U.S. (1884), p.
SI, t. 18, f. 28-32. Wille Norges Desm. (1880), p. 35.
Schaarsohm. Magy. Desm. (1882), p. 270. Lemaire Desm.
Vosg. (1883), p. 20. Kirchner Alg. Schles. (1878), p. 162.
Euastrum depressum, Nag. ? Einz. Alg. t. vii, cf. 2.
Cosmarium phaseolus a typicum, Klebs. Desm. Pruss
(1879), p. 35.
H ab. I n pools.
Cornwall, Westmoreland, Wales; Germany, Sweden, Norway,
Denmark, F rance, Spitzbergen, Hungary, United States.
Plate X X X V I I ; Jig. 3. a, living frond ; I, empty frond; c, end view.
Cosmazium g o tla n d icum . W ittr. Sotv. Alg. (1872), p . 60, t. 4 ,/ . 14.
Frond ra th e r longer than broad, constriction lin e a r; segments
in front view somewhat hexagonal, or angularly reniform
; side view obovate, end view sub-elliptio. Empty frond
delicately punctate.
S ize. Length 37-45 g ; diam. 32-36 g (W.).
Nordstedt Norges Desm. (1873), p. 19. Archer in Journ.
Bot. (1874), iii., p. 93. Wille Norges Alg. (1880), p. 31.
Cosmarium rectangulare, Grunow. Rahh. Alg. Eur. ill., p.
166. ’
H ab. In ponds and pools.
Oomwall, Ire lan d ; Norway, Sweden, Austria.
Plate X X X V I I , fig. 4. a, living frond; 5, empty frond: r, side
view; d, end view.
Cosmazium T z a fa lg a z icum . W ittr. in Nord. & W ittr. Alg. Fxs.
No. 81.
Small, a fifth p a rt longer th an broad ; deeply constricted
in the middle, with a linear sinus, expanding a t th e ex trem ity ;
semi-cells in front view reniform, dorsal margin slightly
emarginate in th e middle ; side view orbicular, furnished
with a small median tu b e rc le ; end view elliptic, with a small
median tubercle on each side.
S ize. Length 24-26 g ; diam. 20-21 g (W.).
Grevillea, Vol. ix. (1880), p. 16.
H ab. In the fountains, Trafalgar Square, London.
Plate X L I I I . , fig. 7. a a, living fronds ; b b, empty frond.9; c, end
view; d, side view.
Cosmazium te tz a ch on d z ium . Lundell Lesm. Suec. (1871), p. 38,
t. 3 ,f . 2.
Small, a little broader th an long, deeply constricted, with
a very narrow linear sin u s ; semi-oells semi-elliptic, scarce
2^ times broader th a n long ; plane a t the base, truncato-
convex a t the apex, rounded a t th e sides, with two granules
a t the isthmus ; end view elliptic oblong, with two granules
on each side ; side view circular, with a granule a t th e base
on each side. Amylaceous granule single.
S i z e . Length 20^ g ; diam. 23-26 g (L.).
Archer Micr. Journ. (1873), xiii., p. 315. Nordstedt
Norges Desm. (1873), p. 17. Jacobsen Desm. Denm. (1874),
p. 194. Wille Norges Alg. (1880), p. 37.
H ab. In pools.
Ireland ; Sweden, Norway, Denmark.
Plate X X X V I I ; fig. 5. a, living frond; b, empty fronds; c, side
view ; d, end view.
Cosmazium b io cu la tum . Breb. in Balfs. Lesm. (1848), ®. 95, t 15,
/ . 6.
Frond minute, about as long as broad ; constriction deep,
producing a gaping notch a t each sid e ; segments about twice
as broad as long, elliptic, smooth; side view compressed,
end view elliptic. Zygospore orbicular, with conical spines.
S iz e . Length 17 g ; diam. 16-16 g (W.) ; length 28 u ;
diam. 25 g (N.).
Schaarsohm. Magy. Desm. (1882), p. 270. Archer in
P rit. Inf. (1861), 731. Wille Norges Alg. (1880), p. 35.
Nordstedt Desm. Arct. (1875), p. 20, t. 6, f. 8 (not fig. 9).
Cleve Sver. Desm. (1864), p. 488. Lundell Desm. Suec.
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