280 1.Vaginaria. 1. HYDROPHYTH. Pl. cell. aph. 
A. OscmtaroripEx. Thallus cylindrical, tubular, 
jointless, membranaceous, gelatinous, or rather leatherlike, 
mostly unbranched ; sporidia ringlike, often becoming glo- 
bular, in a single, parallel, transverse series within the 
tube, so that the tube appears annulated, with a pellucid 
border and interstices. ’ 
Gen. I. 1. VAGINARIA. Sheath-moss. 
Threads simple, gelatinous, parallel, decumbent, enclosed 
several together in a slippery membranaceous sheath; ends 
exserted, radiating, oscillating—Green. 
Vaginaria vulgaris. Common. sheath- moss. 
Sheath simple or branched, glaucous green, slippery; 
threads equal, rings weak. , 
Oscillatoria vaginata, Vaucher, 202. 
Conferva vaginata, Dillwyn Syn. 40; Engl. Bot.1995, 
Oscillatoria autumnalis vaginata, 4gardh Syn. 107, 
Oscillatoria chthonoplastes 8, Lyngbye Hydr. Dan. 92. 
Damp gravel-walks, garden-pots. 
Tuft blackish or bluish green; sheath twining, attenu- 
ated; when cut or pressed, it divides into smaller plants of 
the same kind, these interior plants being thrust out at the 
end or bursten sides gives it a branched appearance ; 
grows very quickly.—Another species of this genus grows 
at the bottom of the sea, where, by fixing the sand, it fa- 
vours the deposition of mud. ; 
IJ. 2. OSCILLATORIA, Vaucher. Quick-moss. 
Threads simple, membranaceous, gelatinous, straight, 
decumbent on a gelatinous, slimy bed; oscillating —Plant. 
aquatic, 
1. Oscillatoria limosa. Mud quick-moss. 
Bed blackish green, slippery, very compact; ¢hreads ra~ 
diating, very long, stiff, straight, bluish green. 
Conferva limosa, Roth Catal. 3,197. 
Conferva fontinalis,. Dillwyn, 64, partly. 
Oscillatoria Adansonia, Vauch. 194. 
Oscillatoria limosa, Agardh Disp. Alg. 33. 
Bottom of still waters; becoming free in the spring. 
Threads entangled; radii an inch long, blunt, oscillate 
very lively; rings very close. 
