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iri
curved, obliquely directed outwards and upwards ; end view
witb three inflated awned lobes ; sides concave at the centre.
Siz e . About 30 x 25 p.
Arcber in Prit. Inf. (1861), p. 738. Nordstedt Norges
Desm. (1873), p. 28. Eabh. Alg. Eur. (1868), p. 221.
H ab. In pools.
Cornwall, Norway.
Plate L ., fig. 5. a, living frond ; h, empty frond; e c d, end views.
I I . Segments in front view with each of the opposite
lateral extremities furnished with a mucro or simple
subulate spine, which in end view terminates the angles,
and is accompanied by others intermediate of a similar
character.
Stauzastzum p u n g en s. Brel, in Ralfs. Desm. (1848), p. 130, t. 34,
/. 10.
Frond smooth, each end with about six subulate spines,
directed outwards ; each angle in the end view tapering into
a spine which has two smaller ones at the base ; segments
in front view externally Innate, the inner margin curved, the
outer truncate.
Siz e . Length and diam. 26 p (L.).
Archer in Prit. Inf. (1861), p. 738. Lundell Desm. Suec.
(1871), p. 64. Nordstedt Norges Desm. (1873), p. 31.
P e tit Liste Desm. Paris (1877), p. 31. Brebisson Liste Desm.
(1856), p. 137. Eabh. Alg. Enr. (1868), p. 214. Jacobsen
Desm. Denm. (1874), p. 209. Scliaarsobm. Magy. Desm.
(1883), p. 273.
Hab. In ponds.
Sussex, Cornwall ; Prance, Sweden, Norway, Denmark,
Hungary, United States.
Plate L ., fig. 6. a, living frond ; h, empty frond; c c d, end views.
Stauzastzum c z is ta tum . Nag. Him . Alg. (1849), p. 127, t. 8,
/ . c. 1.
Frond rough at the ends with a series of papilla-like
granules ; segments broadly elliptic, inner margin somewhat
more turgid than the outer ; end view triangular ; sides
convex, with a submarginal series of papillæ ; angles not inflated,
mncronate.
Siz e . Length 40 p ; diam. 40 p (N.).
Arcber in Prit. Inf. (1861), p. 738. Micr. Journ. (1866),
p. 189. Cleve Sver. Desm. (1864), p. 490. Lundell Desm.
Suec. (1871), p. 64. Nordstedt Norges Desm. (1873), p. 31.
Eabb. Alg. Enr. (1868), p. 215. Nordstedt Desm. Spitz.
(1872), p. 12. Jacobsen Desm. Denm. (1874), p. 208. WiBe
Norges Desm. (1880), p. 44. Lemaire Desm. Vosg. (1883),
p. 23. ..
Phycastrum (P achy actinium) cristatum, Nag. Emz. Alg-
^^^S^urastrum’ nitidum. Archer. Nat. Hist. Rev. (1859), p.
463, t. 33, f. 3, 4.
H ab. In ponds, &o.
Cornwall; France, Germany, Sweden, Norway, Denmark,
Spitzbergen.
Plate L„ f i g . l . a c, living fronds; I, empty frond; d e, end views.
S tau za stzum o lig o c a n th um . B rel, in litt.
Similar in size and habit to 8. cristatum.
In front view th e ends are flat, th e lateral extremities
snhacnte. In end view the sides concave a t the middle,
angles inflated, th en acute.
S ize. L en g th an d diam. 40 p (N.).
Archer Mior. Jonrn. (1866), vi., ms., pp. / / /
Nordstedt Norges Desm. (1873), p^ 31. N o / / e d t Desm.
Arct. (1875), p. 36. Wille Norges Desm. (1880), p. 44.
H ab. In pools.
Ireland, France, Norway, Spitzbergen.
Blate L., fig. 8. «, Hving frond ; I, empty frond; c, end view ; d,
semi-cell further magnified.
I l l Segments with each of th e opposite lateral extremities
■ famished w ith a bifid or forked spine, its snb-diyisions
snbnlate, acnte, in end view terminating th e angles and
appearing as amnoro-like spine with or without in te rmediate
spines.
S tauzastzum a v icu la . Breb. in R alfs Desm. (1848), p. 140, t. 23,
f . 11.
Segments in front view trian g u la r or o u n /te , with a
forked spine on each side; each angle, in end view, te r minated
by a mucro-like spine, with three inflated angles,
th e bifid spine appearing as a mucro ; sides concave.
S ize. Length 43 p ; diam. 50 p (D.) ; diam., without
spines, 25-30 p (W). . , ■ -o t r
Wille Norges Desm. (1880), p. 41. / c h e r in F rit. In .
n s f i l l n 738 t 3 f 18-19. Delponte Desm. (i» /o ) , t. xii.,
^ 2 2 -2 9 ^ L n ld e ll Desm. Snec. "(1871) p. 6L N o rd /e d t
Norges Desm. (1873), p. 28. Brebisson Liste Desm. (1856),
.; '■i , < 1
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