BATRACHOSPERMEE. 291 
var. helmintosum. Bory Ann. d. Mus, t. 29, f. 2. 
Filaments branched, pyramidal, naked below, branches simple, 
subpinnate, acute whorls contiguous, compressed. 
Batrachosperma helmintosa, Bory Ann. Mus, xx. p. 33. 
Batrachospermum helmintosum, Hass. Alg. p. 105. 
“The stems of this beautiful species scarcely exceed 2 inches in length. 
They are fine, and denuded at their base, which appears yellow. 
Numerous branches proceed from it; they are somewhat subulate, and 
diminish in length in such a way that they incline from the extremities 
of the plant, and give it a pyramidal appearance. The whorls are com- 
pressed, voluminous, horizontal, and so approximated that they cannot 
acquire the globular form; they become confused, and form round the 
stems a continuous cylinder of mucosity. The diameter of this cylinder 
equals often that of the plume of a little bird. The branches are not less 
thick at their insertion. The colour of the plant is obscure, of a bluish 
and uncertain green.”— Bory. 
var, bambusinum, Bory, Ann, d. Mus. t, 29, f. 1. 
Filaments sparingly branched, branches simple, cells much 
elongated, whorls minute, distant. 
Batrachosperma bambusina, Bory Ann. Mus, xx. p. 82. 
Batrachospermum bombusinum (Bory). Hass, Alg, 108, t. 
13, f. 3. 
“Tts colour is of the most elegant green; but if the specimens be not 
quickly prepared they very soon turn black upon the paper. From a 
principal filament, 2-4 inches long, proceed many long, slender, loose 
branches, simple, or having sometimes here and there scattered, very 
smail branches, which are never divided. The articulations of the 
principal stem, and of the larger branches, are for the most part naked; 
their point of contact is dilated in such a manner as to resemble the rods 
of bamboos. As to the whorls, they are rounded, smaller than those of 
the neighbouring species, composed of very compact branchlets. Their 
simple ramuli are likewise shorter than in the other Batrachosperms; 
three or four rounded joints compose them; the ciliform appendage 
which terminates them is remarkable. Someramuli, shorter than those 
of the whorl, cover also the inferior part of the articulations, which have 
the appearance of reversed cones.”— Bory. 
Batrachospermum vagum. (Roth.) Ag. Syst. 52. 
Vaguely branched, 1-3 inches long, brownish or bluish-green ; 
inferior internodes covered with a dense mass of branchlets, the 
superior naked, or nearly so, apical joints of the branchlets 
attenuated into-a long bristle. 
Size. Cellules 025 x ‘012 mm. 
Rabh. Alg. Eur. iii., 406. Kirch, Alg. Schles. 46. Eng, 
Fl. v.,388. Eng. Bot.ii.,197. Harv. Man. 119. Hass. Alg. 
109, t. 63, f.2. Kutz. Spec. 536. 
Batrachosperma turfosa, Bory Ann, des Mus. xx., t. 82, f. 1, 
