Staurastrum muricatum, Ralfs Ann. Nat. Hist (1845), x t,
t. 11, f. 1, a, b, c.
H a b . In ponds.
Sussex, Lancashire, West Yorkshire, Westmoreland, Cornwall,
Wales, Scotland ; France, Germany, Sweden, Norway,
Denmark, Italy, Hungary, United States.
Plate L I I ., fig. 1. a, living frond ; i, empty frond -, c d e, end
views ; f g , zygospores.
S ta u z a s tz um p ilo s um . Nag. Einz. Alg., t. 8 a, f . 4.
Segments in front view obliquely elliptic, slightly divergent,
the outer margin more turgid than the inner, end view with
three rounded angles, sides concave, scattered all over, except a
small space at the centre, with extremely fine hair-like spines,
minutely capitate at their extremities, surface between the spines
smooth.
Siz e . Length 44 p ; diam. 38 p (N.) ; length 50 p ; diam.
42 p .
Archer in Prit. Inf. (1861), p. 739. Nordst. Norges Desm.
(1873), p. 30. Nordst. Desm. Arct, (1878), p. 34.
H a b . In pools, &c.
England, West Yorkshire ; Germany, Norway, Spitzbergen.
Plate L I I ., fig . 5. a, living frond ; b, empty frond ; c d, end views ;
e, zygospore.
S ta u z a s tz um B z e b is s o n ii. Archer in Pritch. Infus. (1861), p. 739.
Segments in front view ovate-lanceolate, lateral extremities
rounded, and furnished with numerous short, close-set, hair-like
spines, otherwise smooth, end view with three broadly rounded
angles, the spines confined to the extremities, sides concave.
Zygospore globose, clad with processes once or twice divided at
the apex.
Siz e . Length 60 p \ diam. 54 p (W.) ; length 48 p \ diam.
43-50 p (N.) ; length 72 p; diam. 62 p ; zygospore 72 p.
Lundell Desm. Suec. (1871), p. 63. Nordstedt Norges
Desm. (1873), p. SO. Nordstedt Desm. Arct. (1875), p. 39.
Wille Nov. Sem. (1879), p. 34. Wittr. Sotv. Alg. p. 53.
Nordst. Desm. Spitz. (1872), p. 39. Jacobsen Desm. Denm.
(1874), p. 206. Wille Norges Desm. (1880), p. 43. Schaarschm.
Magy. Desm. (1883),p. 273. Lemaire Desm. Vosg. (1888),
p. 23. Nordstedt Desm. Gron. (1885), p. 10. Wolle Desm.,
U.S. (1884), p. 141, t. 45, f. 5, 6.
Staurastrum pilosum, Breb. Liste Desm. (1856), 141, pi. 2,
f. 49. Cleve Sver. Desm, (1864), 490, t. 4, f. 3.
Staurastrum pilosum, var. Brebissonii, Rabh. Alg. Eur. (1868),
p. 212.
H a b . In pools, &c.
Ireland, Lake District; France, Sweden, NorwayDenmark,
Greenland, Nova Zembla, Spitzbergen, Hungary, United States.
Plate L I I ., fig. 6. a, Hving frond; b, empty frond; c d, end views.
S ta u z a s tz um t e lif e z um . E a lfs Lesm. (1848), p. 128, i. 22, f . 4 ;
t. 34, fi. 14.
Segments reniform, bristly ; end view triangular, with concave
sides, and broadly rounded bristly angles. Zygospore orbicular,
beset witb spines, which are bifid at the tips.
S iz e . Length 46 p\ diam. 43 p (D.) ; diam. 36-50 p (K.).
Archer in P rit. Inf. (1861), p. 739, t. 8, f. 20, 21. Delponte
Desm. (1878), t. 11, f. 1-4. Notaris Desm. Ital. (1867), t.
4,f. 40. Cleve Sver. Desm. (1864), p. 490. Lundell Desm.
Suec. (1871), p. 64. Nordstedt Norges Desm. (1873), p. 30.
Petit Liste Desm. Paris (1877), p. 31. Wittrook Scan. Desm.
(1869), p. 18. Brebisson Liste Desm. (1856), p. 141. Notaris
Desm. Ital. (1867), p. 50, t. 4, f. 40. Rabh. Alg. Eur.
(1868), p. 212. Wille Norges Desm. (1880), p. 43. Lemaire
Desm. Vosg. (1883), p. 23. Wolle Desm. U.S. (1884),
p. 140, t. 45, f. 4. Kirchner Alg. Schles. (1878), p. 170.
Jacobsen Desm. Denm. (1874), p. 205.
H a b . In moor pools. West Yorkshire.
Sussex, Westmoreland, West Yorkshire, Cornwall, Wales;
France, Germany, Sweden, Denmark, Norway, Italy.
var. fl c o n v e x um , Penn. Journ. Eoy. Micr. Soc. (1886), p . 11, figs.
21-23.
Sides slightly convex.
Lake District.
Plate L I I . , fig. 2. a, living frond; b, empty frond ; c d,end views;
e, zygospore.
S ta u z a s tz um h y s t z ix . E a lfs Lesm. (1848), p. 128, f. 22, fi. 5.
Segments subquadrate, spinous ; end view with three or four
rounded angles, each furnished with a few subulate spines.
S iz e . Diam. 22-25 p (Wo.) ; length 24 p ; diam. 22 p .
Archer in Prit. Inf. (1861), p. 739. Oleve Sver. Desm.
(1864), p. 490. Lundell Desm. Suec. (1871), p. 64. Nordstedt
Norges Desm. (1873), p. 31. Wood F. Water
Algaj U.S. (1872), p. 154. Rabh. Alg. Eur. (1868), p. 213.
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