7. D k a p a r n a l d ia n a n a l/ass.
ríate X. Fig. 3.
Char. Filaments highly mucous, very slender, sparingly
branched. Branches acuminate, not usually ciliated.
Cells rather broader than long.
Draparnaldia sparsa Hassall, in Annals of Nat. Hist. xi.
428. Conferva nana Dillw. Brit. Conf. t. 30.
Hah. Cheshunt and neighbourhood : A. H. H. Steven-
ston : Rev. D. Landshorough.
Tliis is by no means an uncommon sjAecies during the sprinfr
and early part of the summer, being found attached frc-
quently to dead leaves and sticks. In the fineness and mucosity
0Í Its filaments, as well as in the shortness of its cells, it seems
to exhibit some relation to the genus Choetophora (a had name,
since the species of the genera Batrachospermum and Draparnaldia
arc likewise choetophorous). From D . tenuis and D
elongata it m distinguished by the absence of cilia, shorter
cells, and from the former again by its smaller size.
9. C H Æ T O PH O R A Schrank.
Chur. Filaments imbedded in a gelatinous matrix, which is
either globose or lohed, rarely plain and crustaceous ; aggregated,
branched, articulated, sometimes setaceous, and
issuing from a common base. Branches nearly colourless.
Kamuh coloured. Capsular fructification has only been
noticed in C. pisiformis, C. pellita, and C. tuberculosa.
Derivation. From a bristle, and ijopsco, to bear.
Ctoop/ioraSchrank; Lyngb. p. 65,66.; Fl.Danica, 1.1728. ;
Agardh, Syst. xix. ; Grev. Scot. Fl. t. 150. Rivu-
laria Bonnemais, in Jour. Physic, xclv. p. 176 My
riodactfon^ Desv. in Jour. Bot. 1809, p. 307. Anhaltia
bchwahl, m Linnæa, ix. p. 127. t. 2. fig. 1. 2. Batrachospermum
sp. Vauch. Conf. t. 12. f. ] 2 t 13
fig. 1, 2. • • J • . .
Tlirough Draparnaldia tenuis and D. nana there is an
easy and natural transition to this genus.
Imbedded in the gelatinous matrix, are usually, in the
older specimens, a number of stony particles; these have been
supposed to be in some way or other connected with reproduction.
Vaucher regards them as the ruptured cells of tlic
plant, and destined to reproduce the species.
1. CniEToriiORA d ila ta ta Ilass.
Plate X I I I . Fig. 2.
Char. Filaments much branched, fastigiate. Fxtrcmitics
dilated.
Ilab. Ire lan d : Mr. Moore.
This species I discovered accidentally, mixed up Avith a
specimen of Nostoc muscorum. I t is very remarkable.
2. ClIÆTOPIIORA ENDIVIÆFOLIA Ag.
Plate IX . Figs. 1, 2.
Char. Mucous matrix somewhat compressed, suh-dichoto-
mously branched. Primary branches frequently parallel ;
apices o f ultimate ramuli ciliated.
Batrachospermum fasciculatum Vaucher, Hist, des Conf.
d’Fau douce, p. 116. pi. xiii. fig. 1.; Harvey in Hooker’s
Brit. Flor. ii. p. 389. Ulva incrassata, F . Bot. 967.
Choetophora endivioefolia Harv. in Manual, p. 122.
llah. Common in streams.
“ This Batrachospermum Is more rare than the preceding
species B. moniliforme, B. plumosum, and B . glomeratum : it
is met with In sloAvly running Avaters, covering stones, to which
it is attached, under the form of a little green protuberance
irregularly lohed at its extremities. I t is but little more
than a fcAV lines in length, and about half as broad. I t can
scarcely be distinguished Avith the unaided sight, but with
the microscope it appears curiously composed. I f but a veiy