CHZTOPHORACER. 191 
Stigeoclonium fastigiatum. Pei Kutz. Tab. Phye. 111, 
t 8, fil. 
2 
Pale green, small, thread very much branched, fastigiate, 
radiately disposed, mucous, upper branches alternate, fastigiate, 
moniliform, somewhat pinnate, a little spreading, extended at 
the apex in a long bristle; cells of the filament three times as 
long as broad, the branches equal or twice as long, swollen, 
constricted at the joints, 
Size. Cells -012 mm. diam, 
Rabh. Alg. Eur. iii., 380. 
Chetophora fastigiata, Ralfs. Alg. Exs., No. 9. 
Attached to aquatic plants. 
Plate LXXIV. fig. 3. Filament of Stigeoclonium fastigiatum xX 
400 diam, 
Genus 72. DRAPARNALDIA. 4g. (1824.) 
Articulate thread simply branched, formed of large cells, for 
the most part hyaline, with a broad chlorophyllose band, always 
sterile; more or less densely furnished with penicellate fascicu- 
late branchlets, alternate or opposite, composed of smaller 
fertile cells. Terminal cells of all the branches empty, hyaline 
and sterile, more or less elongated into a bristle. 
Propagation by resting spores or zoogonidia. 
Draparnaldia glomerata. dg. Syst. p. 59. 
Filaments and primary branches colourless, or nearly so; 
lower cells equal, or a little shorter than their diameter, dis- 
tinctly constricted at the joints ; chlorophyllose bands narrow, 
pale green, primary branches spreading at right angles, some- 
times opposite ; fascicles of the branches crowded, alternate or 
opposite, densely branched, obtuse, oval. 
Size. Cells of main thread ‘035 mm., of fascicles 008 mm. 
Eng. Fi. v., 888. Jenner Tunb. Wells 176. Eng. Bot. ii., 
t. 2545. Harv. Man. 121. Grev. Fl. Ed. 3821. Mack. Hib, 
222. Flor. Dev. ii., 50. Hook. Fl. Scot. ii, 77. Gray. Arr, 
i., 302, Hass. Alg. 120, t. 13, f.1. Rabh, Alg. Eur. iii, 381. 
Kirch. Alg. Schles. p. 67. Kutz. Tab. Phye. iii, t, 12. 
Conferva mutabilis, Dillw. Conf. t. 12. Eng. Bot. i. t, 
1746. 
Batrachospermum conglomeratum, Vauch. Conf. t. 12, f. 1. 
In clear pools or slow streams. 
