I
I i i
(1871), p. 51. Grunow Desm. Austr. (1858), p. 500. Brebisson
Liste Desm. (1856), p. 123. Jacobsen Desm. Denm.
(1874), p. 201. Lemaire Desm. Vosg. (1883), p. 22.
Docidium turgidum, Wittrock Scan. Desm. (1869), p. 20.
Petit Liste Desm. Paris (1877), p. 29.
Dysphinctium turgidum,Dc\])0\itc Desm. (1878), p. 138, t. 21,
f. 1-6.
Pleurotenium turgidum, De Bary Conj. (1858), t. 5, f. 81 ;
Cleve Sver. Desm. (1864), p. 493 ; Rabh. Alg. Eur. (1868), p.
144.
Cosmarium DeBaryi c. turgidum, Klebs. Desm. Pruss. (1879),
p. 28.
H a b . In pools, &c.
Sussex, Wales, Lake District ; France, Germany, Sweden,
Denmark, Italy, Austria.
Plate X L IV ., fig. 1. a, living frond ; i, empty frond ; c, end view.
C a lo c y lin d z u s D eB a z y i. (Archer.)
Frond in front view about twice as long as b ro a d ; constriction
a wide shallow n o tc h ; segments cylindrical, with
broadly rounded ends, endochrome arranged in parietal indented
bands; end view circular; empty frond minutely
punctate, or without puncta.
S iz e . Length 95 g ; diam. 45 g ; length 104-110 g ; diam.
50-54 g (Wo.) ; length 104-112 g ; diam. 50-54 g (L.).
Pleurotenium cosmarioides, De Bary Conj. (1858), t. 5, f.
32, 33. Rabh. Alg. Enr. (1868), p. 144. Olev. Sver. Desm.
(1864), p. 493.
Cosmarium DeBaryi, Archer in P rit. Inf. (1861), p. 735.
Wolle Desm. U.S. (1884), p. 68, t. 15, f. 5. Archer in Mior.
Jonrn. (1871), p. 211. Lnndell Desm. Snec. (1871), p. 52.
Nordstedt Norges Desm. (1873), p. 25. Nordstedt Desm.
Arct. (1875), p. 29. Wille Nov. Sem. (1879), p. 48. Jacobsen
Desm. Denm. (1874), p. 201. Kirchner Alg. Schles.
(1878), p. 146. Wille Norges. Pers. (1880), p. 38.
Cosmarium DeBaryi a. typicum. Klebs. Desm. Prnss.
(1879), p. 28.
H ab. I n m o u n ta in pools.
Ireland, Lake D is tric t; Germany, Sweden, Norway, Denmark,
Spitzbergen, Nova Zembla, United States.
Plate X L IV ., fig. 4. a, living frond ; h, empty frond.
C a lo c y lin d z u s s t z a n g u l a tu s . Clce. andWills.
129
oval, end view oironlar, semi-cells globose, confluent a t th e
base, membrane smooth.
S ize. Length 35 g ; diam. 20-22 g (0 .).
In mountain pools.
N. Wales.
Plate X L IV ., fig. \0 . a, living frond; i , empty frond j c, side view;
d, end view.
C a lo c y lin d z u s p s e u d a z c to um . (Nordst. in W ittr. and Nordst.
Algae. Exs. No. 251.)
Small, about one-fourth p a rt longer th an broad, very
slightly excavated a t th e middle, side view elliptical
semi-cells in front view broadly ovate, apex truncate, upper
angles broadly rounded, end view circularly elliptic.
Size. Length 17-21 g ; diam. 14-16 g ; hsthmns 18|-15
g(N.).
Cosmarium pseudarctoum, Nordst. in W ittr. and Nordst.
Alg® Exs. No. 257.
H ab. Amongst mosses.
Den of Gight; Norway.
Plate X L IV ., fig. 6. a, living frond; h, empty frond; c, end view.
Gen. 19. X A N T H ID IV n i. Ehr. (1832).
Frond deeply constricted, segments broader than long, compressed,
entire, spinous, having a circular cylindrical, or conical,
projection on both surfaces near the centre, which is tuberculated
or dentate, or entire; end view elliptic.
X a n th id iu m a zm a tum . Prel. in Balfs. Lesm. (1848), p. 112, t. 18.
Frond large, in front view twice as long as broad, constriction
deep, linear ; segments broadest at the base ; ends rounded, or
somewhat truncate ; spines in pairs, principally marginal, short,
stout, terminated by three or four diverging points ; central projections
cylindrical, truncate, the border dentate ; empty frond
punctate. Zygospore large, subglobose, scrobiculate.
Siz e . Length 180-200 g ; diam. 90-110g; zygospore 100-
108 g (K.) ; diam. 62-140 g (Wo.).
Archer in Prit. Inf. (1861), p. 735, t. 1, f. 27, 28. Micr.
Journ. xiii. (1873), p. 311. Cleve Sver. Desm. (1864), p. 491.
Lundell Desm. Suec. (1871), p. 75, t. 5, f. 4. Nordstedt
Norges Desm. (1873), p. 37. Petit Liste Desm. Paris (1877),
p. 32. Wittrock Scan. Desm. (1869), p. 19. Wood F, Water
9
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