S ta u z a s tum p u n c tu la tu m . Brel, in B a lfs Besm. (184S), p. 133,
t. 22, f . 1.
Segments rough with pnnota-like grannies, elliptic, equal,
end view with broadly rounded angles, and slightly concave
sides. Zygospore globose, spines long, ra th e r broad a t the
base, dichotomons a t th e apex.
S iz e . Length 45-50 p ; diam. 38-43 p (N.) ; diam. 28-36
(K .); zygospore 29 p-, spines 14 p (L .) ; length 27 u ;
diam. 28 p (D.).
Archer in P rit. Inf. (1861), p. 740. W ittr. Sotv. Alg.
p. 53. Delponte Desm. (1878), t. 11, f. 33-38. Kirchn. Alg.,
Schles. (1878), p. 164. Nordstedt Desm. Arct. (1875), p.
34-41. Cleve Sver. Desm. (1864), p. 490. Lnndell Desm.
Suep. ( 1 / 1 ) , p, 63. Nordstedt Norges Desm. (1873), p. 29.
P e tit Liste Desm. Paris (1877), p. 31. Grunow Desm.
Austr. (1858), p. 502. Wille Norges Desm, p. 42. Wittrock
Scan. Desm. (1869), p. 18. Jacobsen Desm. Denm. (1874),
p. 205. Schaarsohm. Magy. Desm. (1883), 273. Mask. New
Zeal. Desm. (1882), p. 244. Wood P. W a te r Alg® U.S.
(1872), p. 151. Brebisson Liste Desm. (1856), p. 144.
Notaris Desm. Ita l. (1867), p. 51, t. 4, f. 44. Eabh. Alg.
Eur. (1868), p. 208. Nordstedt Desm. Spitz. (1872), p. 39.
Lemaire Desm. Vosg. (1883), p. 23. Nordst. Desm. Gronl.
(1885), p. 10. Wolle Desm. U.S. (1884), p. 127, t. 41,
f. 43-45.
H ab. In ponds.
Snssex, Westmoreland, West Yorkshire, Essex, Wales,
Cornwall; France, Germany, Sweden, Norway, Denmark,
Nova Zembla, Spitzbergen, Austria, Hungary, Italy, Greenland,
United States, New Zealand.
Blate L IV ., fig. 6. a, living frond ; I, empty frond; c if, end views.
S ta u z a s tz um p ile o la tum . Breb. in B a lfs Lesm. (1848'), ®. 215 f
3 5 ,/. 22. ^
Frond quadrilateral, slightly constricted at the middle, segments
terminated by three conical processes, end view triangular,
angles rounded.
S iz e . Length 48 p ; diam. 23 p.
Brebisson Liste Desm. (1856), p. 145. Close in Micr. Journ
(1873J, xiii., p. 99. Rabh. Alg. Eur. (1868), p. 220.
H a b . On rocks.
Devonshire, Ireland, Scotland ; France.
S ta u z a s tz um c a p i tu lu m . Breb. in B a lfs Lesm. (1848), y. 214, i .
3 5 ,/. 25.
Segments in front view quadrate, sides with a rounded sinus
at the middle, the basal and upper angles crenated, rounded,
upper margin straight, end view with three broadly rounded
crenated angles, sides nearly straight, each witb a slight shallow
depression or constriction at the middle.
S iz e . Length 40 p ; diam. 24 p (K.).
Archer in Pritch. Infus. (1861), p. 741. Kirchn. Alg.
Schles. (1878), p. 165.
H a b . In pools.
Prance, Germany.
var. am s e n um . Hilse in Babh. FI. F u r. ill., 209.
Semi-cells dilated upwards, base verrucose.
Nordst. Norges Desm. (1873), p. 29. Wille Nova Sem,
(1879), p. 54. Lemaire Desm. Vosg. (1883), p. 23. Kirchn.
Alg. Schles. (1878), p. 165.
S iz e . Length 38-45 p ; diam. 28 p (N.) ; diam. 25 p (K.).
H a b . In pools.
Dartmoor, Scotland ; France, Germany, Norway, Nova
Zembla.
Plate L V ., fig. 3. a, living frond ; b, empty frond; cde, end views.
var. s p e tz b e z g e n s e . Nordst. Lesm. Spetz., p . 39, t. 7 ,/ . 25.
Lake District.
S ta u z a s tz um M e z ia n i. Beinsch. Alg. FI. (1867), p. 160, t. x il., / 1,
Cells in front view obtuse angled. Segments in front view
trapezoid, almost rectangular, end view triangular, quadrangular,
pentagonal or hexagonal, lateral margins straight, or slightly
emarginate, angles rounded, obtuse, cell membrane densely
warted, warts disposed in parallel series at the angles.
S iz e . Length 37-46 p ; diam. 18-30 p (Re.).
Reinsch. Act. Senkeiil. vi., p. 125, t. 23, d. 1. Crowe Micr.
Journ. xiii. (1873), p. 437. Nordstedt Norges Desm.
(1873), p. 29. Nordst. and Wittr. Desm. Ital. (1876), p. 42.
Lemaire Desm. Vosg. (1883), p. 23. Nordst. Desm. Gronl.
(1885), p. 10. Wolle Desm. U.S. (1884), p. 132, t. 46, f. 17-
19.
Hab. In pools.
West Yorkshire, Lake District, Ireland, Scotland; France,
Germany, Norway, Greenland, Italy, United States.