Gloucester, Cornwall, Wales ; France, Germany, S w /e n ,
Denmark, Norway, Spitzbergen, Nova Zembla, Austria, Italy,
Hungary, Greenland, United States.
Flate X X X r i . , fig. 9. a, living frond; 5, empty frond.
Cosmazium v a z io la tum . Lund. Desm. Sueo. (1871),p. 41, t. 2 ,/ . 19.
Small, two-thirds longer than broad, elliptic, with a deep
median incision, sinus linear, very narrow, semi-cells narrowed
more and more from the base, rounded at the apex, but at the
middle of the apex a little depressed, side slightly convex ; end
view broadly elliptic ; side view obovate. Cell-membrane sub-
pustulate ; amylaceous granule single.
Siz e . Length 32-35 g ; diam. 19-21 g (L .) ; diam. 15-17 g
(W.).
N o rd s te d t Norges Desm. (1873), p. 19. Archer ia Journ.
Bot. (1874), iii., 93. Wolle Desm. U.S. (1884), p. 63, t. lb ,
f. 3, 4. Wille Norges Desm. (1880), p. 35.
H ab. In ponds.
Lake D istric t; Ireland; Norway, Sweden, United States.,
Plate XXXVI., fig. 10. a, living frond; h, empty frond; c, side view ;
d, end view.
Cosmazium cu cum is. Corda Aim. Carls. (1835), f . 27.
Frond about twice as long as broad; constriction deep,
linear ; segments as broad as long, with the basal angles rounded,
broadly rounded a t ends, smooth ; end view elliptic.
Size. Diam. 46-56 g (W .) ; length 70 g ; diam. 88 g (N.) ;
length 36-68 g ; diam. 86-38 g (N.).
Sohaarschm. Magy. Desm. (1882), p. 269. Ealfs. Desm.
(1848), p. 93, t. 15, f. 2. Nordstedt Desm. Greenl. (1885), p.
k Archer in Prit. Inf. (1861), p. 731. Nordstedt Desm.
Arct. (1875), p. 29. Nordst. Desm. Braz. (1869), p. 210.
Cleve Sver. Desm. (1864), p. 487. Lundell Desm. Suec.
(1871), p. 52. Nordstedt Norges Desm. (1873), p. 25. Petit
Desm. Paris (1877), p. 30. Lemaire Desm. Vosg. (1883), p.
22 G r u n o w Desm. Austr. (1858),p. 501. Wolle Desm. U.S.
(1884), p. 58, t. 15, f. 6-9. Wille Norges Alg. (1880),
p 38. WoodF. Water Alg® U.S. (1872), p. 130. Brebisson
Liste Desm. (1856), p. 126. Notaris Desm. Ital.
(1867), p. 40, t. 3, f. 21. Eabh. Alg. Eur. (1868), p. 161.
Wille Nov. Sem. (1879), p. 48. Nordstedt Desm. Spitz.
(1872), p. 36. Jacobsen Desm. Denm. (1874), p. 199 (partly).
Kirclmer Alg. Schles. (1878), p. 146.
Euastrum integerrimum, Ehr. Inf. (1888), p. 163, t. 12, f. 9.
85
Cosmarium cucumis a typicum, Klehs. Desm. Pruss. (1879),
p. 80.
H ab. In pools.
Sussex, Gloucester, Cornwall, Westmoreland, Wales, Scotland
; France, Germany, Austria, Hungary, Italy, Sweden, Norway,
Denmark, Spitzbergen, Nova Zembla, Greenland, United
States, Brazil.
Plate X X X V I., fig. 11. a, living fro n d ; h, empty fro n d ; c, end view.
Cosmazium R a lf s ii. Breb. in Balfs. Desm. (1848), p. 93, 1.15, / . 3.
Frond large, slightly longer than broad, orbicular ; constriction
deep, linear; segments semi-orbicular, rounded at basal
angles, smooth; end view elliptic-lanceolate; endochrome radiate.
Siz e . Length 70-120 g ; diam. 60-100 g (W.).
Breb. Liste Desm. (1856), p. 126. Archer in Prit. Inf.
(1861), p. 731. Lundell Desm. Suec. (1871), p. 52. Nordstedt
Norges Desm. (1873), p. 25. Eabh. Alg. Eur. (1868), p. 161.
Wolle Desm. U.S. (1884), p. 69, t. 15, f. 1. Lemaire Desm.
Vosg. (1883), p. 22.
Cosmarium cucumis, Hassall Fr. W. Alg. (1845), p. 366.
Ealfs. Ann. Nat. Hist. (1844), xiv., t. 11, f. 8.
Cosmarium Balfsii a typicum, Klebs. Desm. Pruss. (1879),
p. 33.
H ab. In boggy waters.
Kent, Sussex, Hants, Norfolk, Warwick, Wales, Scotland;
France, Germany, Norway, Sweden, United States.
Blate X X X V I , fig. 12. a, living frond; b, empty frond ; c, end view.
Cosmazium p a chydezm um . Lundell Desm. Suec. (1871), p. 39,
t. 2, / . 15.
Large, a third part longer than broad, deeply constricted, with
a narrow linear sinus ; semi-cells semi-circular, forming two-
thirds of a circle, lower angles rounded ; end view o v a l; side
view elliptioally orbicular, cell-membrane thick, distinctly but
densely punctate. Amylaceous granules two.
Siz e. Length 105-117 g ; diam. 80-87 g (L .) .; diam.
75-100 g (W.).
Wolle Desm. U.S. (1884), p. 70, t. 15, f. 2, 3. Wille
Norges Desm. (1880),p. 33. Nordstedt* W ittr. Ital. (1876),
p. 31. Schaarsohm. Magy. Desm. (1882),p .268. Jacobsen Desm.
Denm. (1872), p. 200. Lemaire Desm. Vosg. (1883), p. 21.
H ab. In lakes and ponds.
Lake District, Scotland; France, Denmark, Sweden, Hungary,
Italy, United States.
Plate X X X V I I ., fig. 1. a, living frond; b, side view ; c, end view.