co n cen tric ally a rra n g e d ; end view twice as lo n g as broad,
w itb a bro ad inflation a t eaob side.
S ize. Diam. 40 g (Wo.) ; length 53 g ; diam. 50 g (0 .).
Ai’cher in P rit. Inf. (1861), p. 734, t. 2, f. 26. Lnndell
Desm. Suec. (1871), p. 33. Nordstedt Norges Desm.
(1873), p. 14. Grunow Desm. Austr. (1858), p. 501.
Nordst. & W ittr. Desm. Ital. (1876), p. 40. Wolle Desm.
U.S. (1884), p. 86, t. 18, f. 46-48. Wood F. W a te r Algæ
U.S. (1872), p. 133. Brebisson Liste Desm. (1856), p. 131.
Eabh. Alg. Eur. (1868), p. 170. Kirchner Alg. Sohles.
(1878), p. 154. Lemaire Desm. Vosg. (1883), p. 19.
H ab. In pools.
Kent, Sussex, North Wales, Cornwall, Lake D istric t;
France, Germany, Norway, Sweden, Austria, Ita ly , United
States.
Plate X L ., fig. 3. a, living fronds ; 5, empty fronds ; / , side view ;
g, end view.
C o sm a z ium o z n a tum . Ralfs. Ann. Nat. Hist. (1844), xiv., p. 392,
i. 1 1 ,/. 3.
Frond in front view about as long as broad, constriction
deep, linear ; segments semi-orbicular or subreniform, with
a central truncate projection a t th e ends, produced by th e
continuation of a central inflation, rough towards the
margin and on th e inflation, with pearly granules ; end
view with a rounded lobe on each side. Zygospore orbicular,
spiny, spines elongated, dilated a t th e base, and slightly
divided a t th e apex.
S ize. Diam. 33-45 g (W o .); len g th 38-40 g ; diam. 38-
40 g (0 .).
Ralfs. Desm. (1848), p. 104, t. 16, f. 7. Wolle Desm. U.S.
(1884), p. 82, t. 18, f. 39-46 ; t. 49, f. 22-24. A rch e rin P rit.
Inf. (1861), p. 734. Lundell Desm. Suec. (1871), p. 28.
Nordstedt Norges Desm. (1873), p. 13. P e tit Liste Desm.
P a ris (1877), p. 30. Wood F. W a te r Algæ U.S. (1872), p.
133. Brebisson Liste Desm. (1856), p. 130. Rahh. Alg.
Eur. (1868), p. 169. Jacobsen Desm. Denm. (1874), p. 194.
Kirchner Alg. Sohles. (1878), p. 163. Nordst. Desm. Braz.
(1869), p. 213. W ittr. Sottv. Alg. (1872), p. 65. Lemaire
Desm. Vosg. (1883), p. 19.
H ab. In ponds.
Widely distributed. Sussex, Hants, Essex, Westmoreland,
Cornwall, Wales, Scotland; France, Germany,
Sweden, Norway, Denmark, Italy, Brazil, United States.
Plate X L ., fig. 4. a, living frond ; I c, empty fronds j d, end view.
Cosmazium K je llm a u u i. Wille Nova Zem. (1879), p. 42, t. 12,
f i 31.
Medium size, about as long as broad, suh-rectangular,
deeply constricted in th e middle, with a linear sinus; semi-
oells very broadly heart-shaped, sides slightly convex, apex
truncate, with four to six slight undulations, lateral margins
furnished with six small teeth, granules of th e semi-cells
radiately and longitudinally disposed, none in th e centre,
h u t w ith an elevated granular basal tumor, granules disposed
iu five vertical series ; end view elliptic, w ith a five-
granulate tumor on each side a t th e middle. Side view
ovate, with a granulate tumor on each side.
S iz e . Length 28 g ; diam. 28 g (W.) ; diam. 20-26 g
(Wo.).
Wille Norges Fers. (1880), p. 29. Wolle Desm. U.S.
(1884), p . 87, t. 49, f. 19-21.
H a b. In pools.
Lake D is tr ic t; Nova Zemhla, United States.
Plate X L lP .,fig . 11. a, living frond ; h, empty frond; c, end view ; d,
side view.
Cosmazium com m issu za le . L re l. in Meneg. Syn. Lesm. (1840),
p. 220.
Frond small, in front view one-third broader th an long,
constriction very deep, ro u n d ed ; segments narrow, reniform,
with a central somewhat truncate pbojeotion, produced
by th e continuation of th e central inflation; rough on
the inflation, and on th e extremities, with somewhat large
pearly g ran u le s; end view three times longer th an broad,
constricted between th e central inflation and th e rounded
extremities. Zygospore orbicular, spiny.
S iz e . Length 26-30 g ; diam. 34-38 g (Wo.) ; length
30 g ; diam. 40 g.
Ralfs. Desm. (1848), p. 105, t. 16, f. 8. Archer in P rit.
Inf. (1861), p. 734. Brebisson Liste Desm. (1856), p. 131.
P e tit Liste Desm. Paris (1877), p. 30. Wood P. Wate r
Alg® U.S. (1872), p. 132. Eabh. Alg. Eur. (1868), p. 170.
Nordist. Desm. iJraz. (1869), p. 213. Wolle Desm. U.S.
(1884), p. 83, t. 18, f. 49-51.
H a b. In ponds.
Sussex, Gloucester, Cornwall; France, Germany, Brazil,
United States.
var. |8 a cu tum . Breh.
Angles sharper.
Plate X L ., fig. 5. a, living frond ; I, empty frond; c, end view;
d, zygospore.
:I ri
J III
ijLi