S88 8. Lemania. 1. HYDROPHYTE PLcelLaph. 
C. Lemanide.®. Thallus tubular, cylindrical, not 
jointed, torulose, inflated at intervals, cartilaginous, mem- 
branaceous, regularly cellular; sporidia in branched, beaded 
filaments in pencilshaped tufts, scattered on the inner sur- 
face of the tube, afterwards free and filling the tube. 
VIII. 8. LEMANIA. B. de St. Vincent. Leman . 
Thallus simple or branched, olive green, papillose on the 
outside; sporidia elliptical. — Fresh-water. 
1. Lemania Jluviatilis . River leman. 
Threads olive-colour; internodes cylindrical, 5 times as 
long as broad; papillse mostly 3 together; branches and 
.second branches narrower at both ends. 
Conferva fiuviatilis lubrica setosa equiseti facie, Dillen Muse. 7, 47. 
Conferva fiuviatilis, Lin. S. P. 1635; Engl. Hot. 1763. 
Polvspermum fiuviatilis, Vaucher , 99. 
Chantransia fiuviatilis, De Candolle FI. Gall. 2, 50. 
Lemania corallina, Bory in Berl. Mag. 1809, 277. 
Nodularia, Link in Schrad. Journ. 1809, 9. 
Lemania fiuviatilis, Agardh Syn. 70. 
Nodularia fiuviatilis, Lyngbye Hydr. Dan. 99. 
On stones in rapid rivers; summer. 
Holdfasts callous, blackish ; threads numerous, simple 
or branched, 6 inches long, each knot is composed of 2 or 
S papillae, brittle when dry. 
2. Lemania torulosa. Swollen leman . 
Threads mostly simple, narrower at bottom, generally 
thicker at top, olive-colour ; internode about 3 times as long 
as broad. 
Conferva fiuviatilis nodosa, fucum semnlans, Dillen Muse. 39. 
Conferva torulosa, Mohr in Schrad. Journ. 1801, 324. 
Conferva fiuviatilis jS, Engl. Bot . 1763. 
Lemania torulosa, Agardh Disp. 28. 
In mountain-streams. — -A doubtful species. 
D. Vauchekideje. Thallus threadlike, tubular, not 
jointed, mostly branched, cartilaginous, membranaceous, 
regularly cellular; branches vesicular, clubshape or linear; 
sporidia globose, scattered in the tubes of the thallus, or 
in the branches or ends of the thallus. 
IX. 9. BRYOPSIS. Lamouroux. Moss-weed . 
Thallus pinnate, tubular, not jointed, membranaceous, 
gelatinous, cellular ; branches linear ; sporidia globose, 
green, scattered in the stem and branches. — -Marine. 
