i i
(1871), p. 51. Wille Norges Pers. (1880), p. 37. Lemaire.
Desm. Vosg. (1883), p. 22.
H ab. In ponds, pools, &o.
Prance, Germany, Sweden, Norway, Italy, Hungary.
plate X L IV ., fig. 9. a, living frond; 6, empty frond.
C alocylindzus T h w a ite s ii. {Ralfis.)
Frond in front view two or three times longer than broad,
constriction a very shallow groove; segments suboylindrical,
with rounded ends ; endoohrome scattered ; end view circular,
or very slightly compressed; empty frond not punctate, or
puncta very indistinct.
Siz e . Diam. 30 w (Wo.) ; length 58-72 fi ; diam. 28-80 a
(L.).
Schaarschm. Magy. Desm. (1883), p. 271. Wolle Desm.
U.S. (1884), p. 56, t. 12, f. 19; t. 50, p. 28.
Penium Thwaitesii, Cleve Sver. Desm. (1864), p. 492.
Cosmarium Thwaitesii, Ralfs. Desm. (1848), p. 109,1 .17, f. 8.
Brebisson Liste Desm. (1856), p. 132. Archerin Prit. Inf.
(1861), p. 735. Lundell Desm, Suec. (1871), p. 47. Wood
F. Water Algse U.S. (1872), p. 134. Wittrock Scan. Desm.
(1869),p. 14. Rabb. Alg. Eur. (1868), p. 175. Maskell N.
Zeal. Desm. (1882), p. 239. Wille Norges Fers. (1880), p.
37. Lemaire Desm. Vosg. (1883), p. 22.
Cosmarium Thwaitesii a. typicum, Klebs. Desm. Pruss.
(1879), p. 26.
H ab. In ponds.
Gloucester, Wales, Lake D istric t; France, Germany, Sweden,
Norway, Italy, Hungary, New Zealand, United States.
Plate X L IV ., fig. 5. a, living frond ; 5, empty frond ; c, end view.
Calo cy lin d zu s cu z tu s . De Pary Conj. (1858), p. 72.
Frond in front view rather more than twice as long as broad,
constriction very shallow; segments attenuated and rounded at
ends ; endochrome in fillets ; end view circular, endochrome
radiate.
Size. Diam. 26 g (K.) ; diam. 20-32 g (Wo.).
Kirchn. Alg. Schles. (1878), p. 143. Wolle Desm. U.S.
(1884), p. 54, t. 12, f. 15, 16. .
Penium curtum, Breb. in litt, fide Ralfs. Archer in Micr.
Journ. xvi. (1876), p. 236. Nordstedt Norges Desm. (1873),
p. 45. Cleve Sver. Desm. (1864), p. 493. Nordstedt Desm.
Spitz. (1872), p. 25. Wille Nov. Zem. (1879), p. 56.
Nordstedt Desm. Arct. (1875), p. 15.
Dysphinctium Regelianum, Nag. Einz. Alg. (1849), t. 6, E.
Cosmarium curtum, Breb. in Meneg. Syn. Desm. (1840), p.
237. Ralfs. Desm. (1848), p. 109, t. 32, f. 9. Archer in Prit.
Inf. (1861), p. 735. Brebisson Liste Desm. (1856), p. 133.
Eabh. Alg. Enr. (1868), p. 176 (sine var. c.).
Cosmarium Thwaitesii d. curtum, Klebs. Desm. Pruss. (1879),
p. 27.
H ab. In pools.
Gloucester, Cornwall, Ireland ; France, Germany, Norway,
Sweden, Spitzbergen, Nova Zembla, Italy, United States.
Plate X L I I I . , fig. 11. a c, living fronds ; h d, empty fronds ; e, end
view.
Calocylindzus a tten u a tu s . (Preb.)
Frond in front view fusiform, three or sometimes four times
longer than broad ; constriction very .shallow ; segments conical,
rapidly attenuated, ends angular, obtuse ; end view circular ;
empty frond punctate.
Siz e . Length 58 g ; diam. 34 g (N.).
Cosmarium attenuatum, Breb. in Ealfs. Desm. (1848), p. 110,
t. 17, f. 9. Archer in Prit. Inf. (1861), p. 735. Nordstedt
Desm. Arct. (1875), p. 27. Nordstedt Norges Desm. (1873),
p. 24. Wittrock Scan. Desm. (1869), p. 15. Brebisson Liste
Desm. (1856), p. 133.
Cosmarmn curtum var. C. majus, Eabh. Alg. Eur. (1868), p.
177.
Closterium Thwaitesii d. curtum form j., Klebs. Desm. Pruss.
(1879), p. 27.
H ab. In pools, &o.
Gloucester, Wales ; France, Norway, Spitzbergen.
Plate X L I I I . , fig. 12. a c, living fronds ; h d, empty fronds ; e, end
view.
C a locylindzus tu z g id u s . Kirch. Alg. Schles. (1878),g. 142.
Frond very large, in front view oval, tnrgid, rather more than
twice as long as broad ; constriction a shallow sinus ; segments
somewhat tapering, broadly rounded ; end view circular; empty
frond punctate.
Siz e . Length 187-216 g ; diam. 72-82 u (D .) ; diam. 100
g (K.).
Cosmarium turgidum, Breb. in Ealfs. Desm. (1848), p. 110
t. 32, f, 8.
Archer in Prit, Inf. (1861), p. 735. Lundell Desm. Suec.
;i, I
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I I