. 1 ; .
p. 733. Hassall F r. W. Alg., p. 363. Delponte Desm. (1878),
t. 8, f. 31-39. Nordstedt Desm. Arct. (1875), p. 17. Cleve
Sver. Desm. (1864), p. 488. Lundell Desm. Suec. (1871), p.
26. Maskell N. Zeal. Desm. (1882), p. 242. Wolle Desm.
U.S. (1884), p. 74, t. 13, f. 5-7. Nordstedt. Norges Desm.
(1873), p. 12. Grunow Desm, Austr. (1858), p. 501. Nordst.
& Wittr. Desm. Ital. (1876), p. 27. Wood F. Water Algas
U.S. (1872), p. 128. Wittrock Scan. Desm. (1869), p. 12.
Brebisson Liste Desm. (1856), p. 128. Notaris Desm. Ital.
(1867), p. 43, t. 3, f. 28. Babb. Alg. Eur. (1868), p. 158.
Wille Nov. Zem. (1879), p. 34, Nordstedt Desm. Spitz. (1872),
p. 27. Klebs. Desm. Pruss. (1879), p. 39, in part, Jacobsen
Desm. Denm. (1874), p. 193. Kirclmer Alg. Schles. (1878),
p. 151. Nordst. Desm. Braz. (1869), p. 207. Wittr. Sottv.
Alg. (1872), p. 56. Schaarsohm. Magy. Desm. (1883), p.
263. Lemaire Desm. Vosg. (1883), p. 19.
Heterocarpella botrytis, Bory Diet. Class. (1823), t. 8.
Cosmarium deltoides, Corda. Aim. Carls. (1835), p. 120, f.
18.
Euastrum botrytis, Ehr. Infus. (1838), p. 163.
Euastrum angulosum, Ehr. Infus. (1838), t. 10, f. 8.
H ab. In pools.
Sussex, Essex, Gloucester, Cornwall, Lancashire, Westmoreland,
Wales, Scotland ; Germany, Prance, Italy, Denmark,
Austria, Hungary, Norway, Spitzbergen, Sweden, Nova Zembla,
New Zealand, United States, Brazil.
Plate X X X IX ., flg. 4. a c, living fronds; I d , empty fronds; e,
end view; f , side view ; g, zygospore.
Cosmazium T u zp in i. B rel. Liste Lesm. (1856), p. 127.
Frond about as long as broad, constriction deep linear, segments
twice as broad as long, somewhat triangular, much inflated
and broadly rounded at the base, rapidly attenuated, sides
concave, ends truncate, rough all over with scattered pearly
granules, and with a central granulated protuberance, end view
narrowly elliptic, with the central broad truncate protuberance
on each side.
S iz e . Length 72 g ; diam. 66 g (L.) ; diam. 55-70 g
(Wo.) ; length 72 g ; diam. 72 g (D.).
Wittr. Sottv. Alg. (1872), p. 56. Schaarsohm. Magy. Desm.
(1883), p. 264. Wolle Desm. U.S. (1884), p. 158, t. 17, f.
24, 25. Archer in Pritch. Infus, (1861), p. 733. Lundell
Desm. Sueo. (1871), p. 29. Nordst. Norges Desm. (1873), p.
13. Wille Nova Zem. (1879), p.Bo.
Heterocarpella didelta, Turpin. Mem. Mus. xvi, p. 295. fig. 16.
107
Cosmarium didelta, Kutz. Sp. Alg. (1849), p. 174.
Cosmarium protractum, Cleve Bidrag (1864), p. 488.
Wiltshire, North Wales ; France, Germany, Norway, Sweden,
Hungary, Italy, United States.
var. cam b z lcum. Josh. Journ. Bot. (1886), p . 35, t. 254,/. 8.
Rather smaller than the typical form, more rotundate, less
truncate ; basal angles less protruded ; form of central inflation
two distinct ovals set obliquely, composed of oblong granules.
S iz e . Length 60 g ; thickness, with inflation, 35 g ; width
50-60 g ; isthmus 17 g.
H ab. In pools.
North Wales.
Plate X L I ., flg. 4. a, living frond; I, empty frond ; c, end view;
d, side view.
Cosmazium sp o z te lla . Breh. in Pritch, Infus, (1861),p. 734.
Frond about as long as broad, constriction deep, linear, segments
reniform, with a central truncate projection at the e n / ,
its angles slightly dilated and denticulate, rough all over with
scattered pearly granules.
S iz e . Length 45 g ; diam. 43 g (0 .).
Nordst. & Wittr. Desm. Ital. (1876), p. 28.
H a b . In pools.
Lake District, Den of Gight ; France, Italy.
Plate X L I ., fig. 6. a, living frond; I , empty frond ; c, side view ; d,
end view.
Cosmazium cozbula. B re l, in P ritch. Infus. (1861), p . 734.
Frond about as long as broad, constriction deep, linear, segments
subreniform, a central truncate projection a t the ends,
with its angles slightly dilated and minutely denticulate,
furnished at the centre of each segment with a circular protuberance
bordered with granules, and rough thereon, and towards
the margin with scattered pearly granules.
Size. Length and diam. 85-38 g (0 .).
Wolle Desm. U.S. (1884), p. 83, t. 49, f. 28-30?
H ab. In ponds.
France, United States.
Plate X L I I I . , fig. 9. o, living frond ; I h, empty fronds ; c, end view,
Cosmazium pzaemozsum. B re l, in Pritch. In f. (1861), p. 733.
Frond rather longer than broad, constriction deep, linear,
segments broadly reniform, sides rounded, ends somewhat / n -
cate, rough with pearly granules, an annular series of which.
:
I l
< 1 ' ■)
I . ' :
IL