S ta u r a s tr u m la n c e o la tum . Archer in Micr. Journ. (1862), ii., p.
248, t. 1 2 ,/. 16-22.
Frond minute, segments smooth, broadly lanceolate,
extremities aonte, minutely apiculate ; end view triangular,
angles minutely apiculate, sides concave.
Size. Length 25 /x; diam. 33 p (N.), 25 x 25 p.
Lundell Desm. Snec. (1871), p. 60. Nordstedt Desm.
Arct.;(1875), p. 33. Eabh. Alg. Enr. (1868), p .202. Wille. Nov.
Sem. ^ 8 7 9 ), p. 51. Nordstedt Desm. Spitz. (1872), p. 38.
Nordst. Desm. Gronl. (1885), p. 10.
H ab. In pools, coating Sphagnum.
Ir e la n d ; Spitzbergen, Sweden, Germany, Bavaria, Greenland,
Nova Zembla.
Plate L IV ., flg. 2. a, living frond; h, empty frond ; c d, end viewa ;
e f , zygospores.
S ta u r a s tr u m in c o n s p ic u um . Nordst. Norges Lesm. (1873); p. 26,
Very minute, about as long as broad; constriction a broad
rounded sinus; segments quadrate, upper angles produced
into a long process, each obliquely directed upwards and a t
about half its length suddenly narrowed, presenting a
knobbed-like appearance a t th a t point, upper portion still
more obliquely directed upwards, end truncate, upper margins
truncate, end view four radiate, sides concave.
S ize. Length 14-15| p ; diam. 14-15 without rays (N.) •
diam. 14-16 p (Wo.).
Archer Quart. Journ. Micr. Sci. x (1870), p. 89. Jonrn.
Bot. iii. (1874), p. 91. Wolle Desm. U.S. (1884), p. 125,
t. 53, f. 4-6.
H ab. I n ponds.
Cornwall, South and West of Ireland, Norway, United
States.
Plate L IV ., fig. 3. a, living frond; 5, empty frond; c, end view;
d, front view further enlarged.
t t Segments having the projecting portions surrounded by
annular transverse lines (punctce or granules).
S ta u r a s tr u m s t r io l a tu m . CKdg.) Pritch. Infus. (m e i), p. 74D.
Segments in front view reniform, divergent, ends concave,
each of th e lateral portions crossed by about five transverse
lines (annular rows of closely set puncta or minute grannies),
end view with three rounded angles, sides concave, each of
th e projections crossed, as before, by about five transverse
lines, the central portion smooth.
S ize. Length 20-22 /x ; diam. 1 9-22/x (N.) ; diam, 22-35
p (W.) ; diam. 22-30 p (K.).
Lnndell Desm. Suec. (1871), p. 57. Nordst. Norges Desm.
(1873), p. 26. W ittr. Sotv. Alg. (1872), p. 52. Schaarsohm.
Magy. Desm. (1883), p. 272. Nordst. Desm. Bras. (1869),
p. 225. Wolle Desm. U.S. (1884), p. 126, t. 51, f. 27-28.
Kirchn. Alg. Sohles. (1878), p. 164.
Phycastrum striolatum, Näg. Einz. Alg. (1849), p. 126,
t. viii. a, fig. 3.
H ab. In ponds.
Germany, Sweden, Norway, Hungary, Brazil, United
States.
Plate L IV ., fig. 4. a, living frond ; b, empty frond ; cde, end views.
t t t Fronds rough superficially with scattered granules.
S ta u z a s tum m u z ic a tum . Breb. in Meneg. Syn. Lesm. (1840), p. 226.
Segments semi-orhicular, rough with conic grannies, end
view triangular, w ith convex sides, and broadly rounded
angles.
S ize. Length 50-72 p ; diam. 43-57 p (D .); diam. 53 p
(K.).
Ralfs Desm. (1848), p. 126, t. 22, f. 2. Archer in P n t.
Inf. (1861), p. 740. Wille Norges Desm. p. 43. Kirchn. Alg.
Sohles. (1878), p. 164. Delponte Desm. (1878), t, 11, f. 51-52.
Oleve Sver. Desm. (1864), p. 489. Nordstedt Norges Desm.
(1873), p. 29. P e tit Liste Desm. Paris (1877), p. 31.
Brebisson Liste Desm. (1856), p. 141. Jacobsen Desm.
Denm. (1874), p. 205. Schaarschm. Magy. Desm. (1883),
p. 273. Notaris Desm. Ita l. (1867), p. 50, t. 4, f. 42. Eabh.
Alg. Bur. (1868), p. 208. Wolle Desm. U.S. (1884), p. 127,
t. 42, f. 3-6.
Staurastrum muricatum, ß., Ralfs Ann. Nat. Hist. (1845),
X T ., p . 154, t. 11, f. 1, de.
Binatella muricata, Breh. Alg. Eal. (1835), p. 66.
Desmidium apiculosum, Ehr. Inf. (1838), p. 142.
Xanthidium deltoideum, Corda Aim. Carls. (1840), t. 5,
f. 38-39.
Phycastrum apiculosum, Kntz. Phy. Germ. (1845), p. 137.
Ooniocystis (Trigonocystis) muricata, var. p., Hass. P r. Alg.
(1845), p. 351, t. 84, f. 10.
H ab. In ponds.
Sussex, Westmoreland, W ales, Cornwall; Prance, Germany,
Norway, Sweden, Denmark, Ita ly , Hungary, United States.
Blate L IV ., fig. 5. a, living frond ; b, empty frond ; e d, end views.
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