Siz e . Diam., including arms, 127 /x (A.).
H ab. In pools.
Ireland.
Plate L X I ., Jig 3. a i, end views.
This species has never been fully and properly described, in common
with many others of Mr. Archer’s species.
S tauzastzum fu z c ig e zum . Preb. in Meneg. Syn. Lesm. (1840),
p . 226.
Segments granular, separated by a deep constriction, terminating
on each side in two stout bifid processes, end view
with three or four angles each terminating in a process, sides
concave at the centre.
S iz e . Length 72 p \ diam. 72 p (D.) ; length 77-83 p',
diam. 90 p (K.) ; diam. 50-62 p (Wo.).
Brebisson Liste Desm. (1856), p. 136. Archer in Prit. Inf.
(1861), p. 743, t. 3, f. 32-33. Cleve Sver. Desm. (1864), p.
490. Lnndell Desm. Suec. (1871), p. 70. Wolle Desm. U.S.
(1881), p. 146, t. 48, f. 12-14, t. 52, f. 23, 24. Nordstedt
Norges Desm. (1873), p. 36. Petit Liste Desm. Paris (1877),
31. Wittrock Scan. Desm. (1869), p. 18. Wittr. Sottv. Alg.,
p. 50. Wood P. Water Alg® U.S. (1872), p. 154. Eabh.
Alg. Eur. (1868), p. 219, in part. Wille Norges Desm.
(1880), p. 47. Kirch. Alg. Schles. (1878), p. 167. Lemaire
Desm. Vosg. (1883), p. 24. Jacobsen Desm. Denm. (1874),
p. 209.
Didymocladon furcigerum, Ralfs Desm. (1848), p. 144, t. 33,
f. 12. Delponte Desm. (1878), p. 78, t. 14, f. 24-27. Schaar-
sclim. Magy. Desm. (1883), p. 274.
Asteroxanthium furcigenm, Kutz. Sp. Alg. (1849), p. 183.
Xanthidium coronatum, Ehr. Mikr. Leb. in Amer., p. 138, t.
4, f. 26.
Asteroxanthium coronatum, Kutz. Sp. Alg. (1849), p. 183.
Phycastrum furcigerum, Kutz. Phy. Germ. (1845), p. 188.
H ab. In pools.
Cliesbire, Lancashire, Westmoreland, Sussex, Hants,
Wales, Cornwall; Prance, Germany, Sweden, Norway, Denmark,
Italy, Hungary, United States.
Plate L X I I ., flg. 1. a, living frond ; b c, empty fronds; d e f , end
views.
S tauzastzum se x a n g u la z e . Ptiln. in Hedw. (1863), ii., p. 501, t.
IX. A., flg. 1.
Middle size or larger, constricted with a broad aoute-angled
sinus, semi-cells more or less depressedly globose, dorsal margin
truncate, ventral convex, lateral processes in pairs (rarely
th r e / , divergent, deeply cut, broadly protracted, processes elon-
gatod, colourless, margin delicately 3-4 toothed, apice 3-4-fid,
/ d view 4 to 7 sided, angles a little protracted, elongated into
two (rardy three) rays, margin denticulate, ends 3-4-fid, deeply
incised, inner angles retuse, ornamented with a row of granules
within the margin.
S iz e . Length 44-60 p, with rays 100 p ; diam. 28-43, with
rays 90-116 p-, longest rays 32 p J . ) , 100x 45-54 p (0 .)
Archer Micr. Journ. xvii. (1877), p. 192. Lundell Desm.
ri ri P' ri 9- Nordstedt Norges Desm.
(1873), p. 66. Wille Norges Desm. (1880), p. 47. Nordst.
de Algis (1880), p. 1 1 .
Didymocladon sexangularis, Bulnheim in Hedwigia ( 1 8 6 3 )
I I ., p . 5 1 , t . ix. A, f. 1 . 6 K J
Staurastrum furcigerum, Rabh, Alg. Eur. (1868), p. 219, in
part. ’
H a b . In mountain pools.
Germany, Sweden, Norway, Java.
^ Plate L X I I ., fig. 3. a a, living fronds ; b, empty frond ; e d, end
Views. B la teL X IV .,J tg , 4i. a 5, end views.
Staurastrum a r tiscon {Ehr.). Lundell Desm. Suec. (1871), _p. 40.
_ Segments narrowed at the base, separated by a deep constric-
tion,_ spines numerous, restricted to the outer margin, stout
terminated by three or four diverging points, end view nine-
sided, angles extending m straight radiating processes, with six
similar shorter processes in the middle, membrane delicately
punctate. •'
S iz e . Length, with processes, 130 p ; diam., with pro-
( w T ) 1 0 0 - 1 2 0 p
A r c / r Micr. Journ. xvii. (1877), p. 192. Lundell Desm.
buec. (1871), p. 70, t. 4, f. 8. Nordstedt Norges Desm (1873)
p. 36. Wille Norges Desiii. (18801, p. 46. Wolle Desm. U s ’
^ 8 8 4 ), p. 148, t. 47, f. 9, 10.
Xanthidium (?) artiscon. Archer in Prit, Inf. (1861), p 736
W o / P . Water Alg® U.S. (1872), p. 156. Eabh. Alg. Eur.'
(1868), p. 224.
Asteroxanthium artiscon, Kutz. Spec. (1849), p. 184.
H a b , In pools.
Ireland ; Germany, Sweden, Norway, United States.
'" " “S frond; b c, empty fronds; rf e, end
Ik
I ' M lli
l '
/ fi
i: '