i ' !
S ta u ia .s tx um q u a d r a n g u la r e . Breb. in Malfs Besm. (1848), p.
128, t. 22, f . 7.
Frond smooth ¡ segments quadrangular, with a few marginal
spines or teeth ; end view quadrilateral, with truncate angles,
either emarginate or dentate.
Siz e . Diam. 22-26 p (K-) i diam 23-30 p (Wo.).
Kirclm. Alg. Schles. (1878), p. 170. Archer in Prit. Inf.
(1861), p. 741, t. 3, f. 24-25. Lundell Desm. Suec. (1871),
p. 64. Nordstedt Norges Desm. (1873), p. 31. Rabh. Alg.
Eur. (1868), p. 215. Nordst. Desm. Bras. (1869), p. 229.
Wolle Desm. U.S. (1884), p. 145, t. 41, f. 1-4.
H ab. In pools,
Westmoreland ; France, Germany, Sweden, Norway, Brazil,
United States.
var. 0 m a jo r. E a lfs JDesm., p. 129, t. S4, fig. 11.
Angles in end view broader, with four teeth at the extremity,
and two minute teeth on upper side.
H ab. Ill pools,
England ; France.
Flate L V .,fig . 4. a, living frond; b b, empty fronds; c d, end views,
S ta u r a s tr u m q u a d r is p in um . Turn. Naturalist {1886), p . 35, t . l ,
f i 4.
Of medium size, much longer than broad, frond smooth, or
slightly punctate, each angle of the segments bearing four stout
divergent spines; ends of segments slightly concave, sinus
wide, expanding rapidly.
Siz e . Long 3 4 p.; d iam ,2 6 p ; istlimusSp; spines 1 0 /x (T.).
H ab. In pools.
Monmouth (Wales) ; United States.
Blate L V ., fig. 5. a, living frond ; b, empty frond ; c d, end views.
From figures by W. B. Turner.
S ta u r a s tr u m lo n g is p in um (Bailey). Archer in Fritch. Infus. (1861),
p . 743.
Segments in front view triangular, truncate, on outer margin
smooth, terminating at each side in two much elongated stout
processes, subacute at the apex, placed one above the other,
divergent; end view with three angles, each extremity terminated
by a process, and having the other immediately above it
on the upper surface, side straight.
Siz e . 96-108 x 90-102 p.
Archer Micr. Journ. xii, (1872), p. 199 ; xvii. (1877), p.
192. Wood F. W. Alg. U.S. (1872),p. 148. Lundell Desm.
Suec. (1871), P- 73. Nordstedt Norges Desm. (1878), p. 37.
Wood F. Water Alg® U.S. (1872), p. 118. Rabh. Alg. Eur.
(1868), p. 221. Wolle Desm. U.S. (1884), p. 145, t. 4 / f. 7.
Staurastrum didentatum,'W\iiv. Anteck 1869, p. 16, f. 7.
Didymocladon longispinum, Bailey Micr. Obs. (1850), pi. 1,
f. 17.
H ab. In pools, &c.
Ireland; Sweden, Norway, United States.
Flate L V I ., fig. 1. a, living frond ; b, empty frond; c d, end views.
S t a u r a s tr um B r a s ilie n s e . Lundell Lesm. Suec. (1871), f . 73, i. 5.
/ • 2 .
Large, about one-third part longer than broad, deeply constricted,
with a broad sinus, semi-cells shortly cnneate, dilated
upwards, dorsal margin truncate, or a little retuse, angles with
three firm divergent spines ; end view four (or flve) angled,
angles terminating in three firm long divergent spines, sides
concave, membrane punctate.
Siz e . Length 43-51 p ; diam 25-37 p ; spines 13-25 p (N.).
Nordst. Norges Desm. (1873), 70. Wolle Desm. U.S.
(1884), p. 146, t. 48, f. 1-3 (scarcely Nordst. Desm. Bras.
(1869), p. 227, t. iv., f. 39.)
H a b . In mountain pools.
North Wales, Ireland ; Sweden, Norway (Brazil ?).
Plate L V I ., fig. 2. a, living frond ; b, empty frond ; c d, end views.
V III. Segments without spines, in front view and end view
angles terminated by either a conspicuous rounded
nipple-like projection, or enlarged rounded knob, or an
elongate capitate process.
S ta u r a s tr u m tu m id u m . Breb. in Malfs Lesm. (1848), 126, i. 21,
/ . 6.
Segments smooth, elliptic or sub-orbicular, end view bluntly
triangular, each angle terminated by a nipple-like projection ;
empty frond minutely punctate, zygospore ovoid, with a thick
membrane clad with scattered conic obtuse spines.
Siz e . Zygospore length 126 p', diam. 92 p \ spines 14 p
(L.) ; length 176 p ; diam. 92 /x(C.) ; diam. 112 p (Wo.).
Wille Norges Desm. (1880), p. 47. Archer in Prit. Inf.
(1861), p. 741. Cleve Sver. Desm. (1864), p. 489. Lundell
Desm. Suec. (1871), p. 72, t. 4, f. 10. Nordstedt Norges
Desm. (1873), p. 37. Petit Liste Desm. Paris (1877), p. 31.
Brebisson Liste Desm. (1856), p. 143. Rabh. Alg. Eur.
(1868), p. 201. Jacobsen Desm. Denm. (1874), p. 208.
Wolle Desm. U.S. (1884), p. 120, t. 39, f. 1-2.
'I,
i !Í
'A '
■ l i : .
' I
If