120 ZYGOPHYCE.E.
VMfi
Prit. Inf. (1861), p. 735. Delponte Desm. (1878), t. 7, f.
40-45.? Cleve Sver. Desm. (1864), p. 488. Lundell Desm.
Suec. (1871), 44. Nordst. Desm. Braz. (1869), p. 214.
Nordstedt. Norges Desm. (1873), p. 21. Brebisson Liste
Desm. (1856), p. 132. Klebs. Desm. Pruss. (1879), p. 37
(var. a.). Wille Norges Pers. (1880), p. 37. Schaarschm.
Magy. Desm. (1883), p. 270. Lemaire Desm. Vosg. (1883),
p. 21. Wittrock Scan. Desm. (1869), p. 14. Eabh. Alg. Eur.
(1868), p. 173. Jacobsen Desm. Denm. (1874), p. 200.
Kirchner Alg. Schles. (1878), p. 147.
Tessarthronia moniliformis, Turp. Diet. Sci. Nat. (1820), t.
7, f. 1.
Tessarthra monilifoi~mis, Ehr. Abh. Berl. Ak. (1835), p.
173. Ehr. Inf., p. 145, t. 10, f. 20.
H ab. In ponds.
Sussex, Lancashire, Wales, Cornwall ; France, Germany,
Norway, Sweden, Denmark, Hungary, Italy, United States.
Plate X L I I I . , Jig. 2. a, living frond ; i, empty frond ; c, end view ;
d, zygospore.
Cosmarium J a co b sen i. Boy, in Micr. Jour. (1884), Vol. iv.,
p . 194.
Small, about twice as long as broad, with an aoute-angled
deep incision, semi-cells oval, broader than long, side view
orbicular ; membrane smooth, at first with a gelatinous envelope.
S iz e . Length 4 5 g ; diam. 26-27 /«(J.).
Cosmarium moniliferum, Jacobsen Desm. Denm, p. 200, t. 8,
f. 24.
H ab. In mountain pools.
Lake District (England) ; Denmark.
Plate X L I I I . , fig. 3. a, living frond; I empty frond; c, side view.
Cosmazium p a zvu lum . B rel. Liste Lesm. (1856), p . 133, t. 1,
/• 18.
Frond minute, in front view ovato-elliptic, about one and a
half times longer than broad ; central constriction a very
shallow groove ; segments tapering, ends broadly rotundato-
truncate, cell membrane smooth, or rarely very delicately
punctate.
S iz e . Length 44-49 g ; diam. 18-19 g (L.) ; length 28-34
g ; diam. 15-17 g (N.) ; diam. 18-22 g (Wo.).
Archer in Prit. Infus. (1861), p. 735. Nordst. Desm.
DESMIDIE.E. 121
Arct. (1875), p. 27, t. 7, f. 21. Nordst. Desm. Braz. (1869),
p. 215. Lundell Desm. Sueo. (1871), p. 50. Nordst. Norges
Desm. (1873), p. 24. Wolle Desm. U.S. (1884), p. 59, t. 18,
f. 12, 13.
H a b . In pools.
Lake District; France, Sweden, Norway, Nova Zembla,
Brazil, United States.
Plate X L I I I ; fig. 8. a, iivingfrond; I, empty frond; c, side view.
Cosmazium lobato sp o zum. Archer in Micr. Journ. (1867), vii.,
p . 171.
Frond very minute, nearly twice as long as broad, general
form elliptic ; ends rounded, constriction an extremely shallow
and very gentle narrowing. Zygospore rounded, somewhat
irregularly lobed ; the lobes surmounted by one or two minute
pellucid conical and pointed spines or mucrones ; cell wall
reddish.
S iz e . Length 15 m ; diam. 10 a» ; zygospore 25 g (Ar.).
Eabh. Alg. Eur. (1868), p. 179.
H a b . In bog pools.
Ireland.
■ il:-
Cosmazium g lob o sum . Buln. in Hedwigia (1861), p . 52, t. 9,
/ . 8.
Small, greenish yellow, sub-circular, scarcely compressed,
about one-third longer tlian broad, very slightly constricted
with an acute sinus ; semi-oells circular except at the confluent
base, quite entire ; cell membrane even, finely punctate.
S iz e . Length 30-34 g ; diam. 20-22 g (L.) ; length 29-32 g ;
diam. 21-24/1 (Wille) ; length 25-33 g ; diam. 20-24 g (Wo.).
Eabh. Alg. Eur. (1868), iii., 178. Lundell Desm. Suec.
(1871), p. 45. Nordst. Norges Desm. (1873), p. 22. Jacobsen
Desm. Denm. (1874), p. 201. Nordst. Desm. Gronl. (1885),
p. 9. Nordst. Desm. Arct. (1875), p. 28. Wille Nova Sem.
(1879), p. 45. Lemaire Desm. Vosg. (1883), p. 21. Wolle
Desm. U.S. (1884), p. 60, t. 49, f. 14-17.
H a b . In bogs.
France, Scotland, Germany, Sweden, Norway, Denmark,
Greenlauk Nova Zembla, Spitzbergen, United States.
Plate X L I I I . , fig. 6. a, living frond; I, empty frond; c, end view ;
d, living frond of another form ; e, empty frond.
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