27. T O L Y PO T H R IX Kützing.
Char. Filaments o f nearly equal diameter, tufted, tenacious.
Branehes few, continuous with the main filaments, annulated
at the base. Cells indistinct, rarely moniliform.
Sporules escaping at the extremities o f the filaments.
Derivation. From ToXwiry, wool, and 6 p f, hair.
Kiitzing, in his “ Phycologia Generalis,” has established
the genus Tolgpothrix, which I here adopt. In the genus Calothrix
Ag. Kiitzing describes only C. mirabilis, a production
Avhich differs essentially and generically from the proper
Calothrices, all of Avhich Kiitzing refers to his new genus.
A preferable arrangement I conceive would have been to
have constituted a new genus for the single species C. mirabilis,
and to have alloAved the Calothrices to have remained in
the genus in which they have been so long placed, and the
nature of which is so Avell understood hy algologists.
a. Branches discrete.
1. T o ly p o th k ix p u n c t a t a Hass.
Plate L X IX . Fig. 3.
Char. Filaments somewhat irregular, very sparingly branched,
diameter considerable. Cells not quite so long as broad,
nucleated.
Hab. Under a cascade, co. Wicklow: Mr. Moore.
This species is larger than T. distorta, and the filaments
less uniform ; the branches are rarely formed, and the cells
punctated.
2. T olypothkix distorta Kutz.
Plate L X IX . Fig. 4.
Char. Filaments elongated, bluish green, forming large tufts,
mucous, somewhat rigid, branched. Branches erect,flexuous.
Conf. distorta Dillw. t. 22. ; F . Bot. t. 2577. C. distorta
Harv. in Hook. Brit. Flor. p. 369. ; Harv. in Manual,
p. 1 5 8 .
Hab. Adhering to sticks, stems, &c.; common.
This species forms tufts of from half an inch to an inch in
height, of a dark green hue, which on drying becomes of an
ntense v e r d ip s or blue green colour; the filaments are slen-
dei, and the branches elongated and simple.
3. T o l y p o t h r ix B e r k e l e y a n a Carm.
Plate L X IX . Fig. 5. ?
Char Filaments minute, bright grass green, flaccid, flexuous,
tufted. — Harv.
Calothrix Berkeleyana Harv. in Hook. Br. Fl. p 367 • also
in Manual, p. 157. ’’
“ T ufts scattered, about a Hue in diameter, of a vivid
green eolour. F.lame„ts twenty to th irty iu each tuft, ra-
diatmg honzontally from a central point, enoeedingly slender,
flaccid, tapering to a hyaline point, variously curved or fleia
/m n e l f T T ' “ J ‘« ‘/ • ''’’¡cota; but the filamouts
» e much shorter and more slender, and possess nothing of
e rigid, erect habit of that species.” — Carm. M S rum
icone,
4 . T o l y p o t h r ix n iv e a Hass.
P late L X IX . Fig. 6.
Char. “ Filaments exceedingly slender, rigid, white, formmq
dirty yellow continuous tufts.” — Harv.
C m f.m r ra Dilhv. t. c , ; E. Bot. 2529. Cal. niu.a Harv.
in Hook. B n t. F l . ; also in Manual, p. 157.
/M5 In sulphur springs, Yorkshire and D u rh am : Dr.
Willan. Near Darlington; Mr. W. Backhouse. Plentiful
in sulphur springs, Llanwrtyd, and other similar springs
in Great Britain : Dillw. ®
“ Dr. Willan assures ns that this species is found below
spi mg no further than as the water retains the sensible
R