( ns ) 
XVIII.— Description of two New Plants of 
the Order Alg^, found in Scotland. 
R. K. Grbville, Esq. F.R.S.E. M.W. S. &c. 
(Read 26th Jmimry 1822.) 
EcHiNELLA, Lyngbye. 
Oen. Char. Massa sub-gelatinosa, granulis solitariis, 
cjtineatis, elongatisve, farcta. Lyngb. 
Echinella circuiaris, mihi. 
tlcMnella^ Jills simplicibus, strictis, hngitudinaliter w- 
gualibus, compactis, cuneatis, in circulo piano dispositis. 
Tab. viii. %. % 
Hab. In paludibus et rivulis lente fluentibus, sgepe ad 
folia mortua, &c. 
Individual plants very minute, but, from generally grow- 
ing in considerable quantities together, the species is suffi- 
ciently conspicuous. It exists, either in dense masses, of ^ 
dull-green colour, with a slight submetallic lustre, or occa- 
sionally dispersed and attached to the stems of rushes and 
