76. 
fluviatilis. 
al’bida. 
Alii. 
-CRYPTOGAMIA. ALG. Lichen. L. Gelatinous. 
rigid.» Segments lobed, blunt, oblong, thick, surface not 
-wrinkled. Tubercles rare, dull brown green; globular or flat ; 
in the extremities, or on the disc. Dini. L. submarginalis. 
Jac. coll. iti. 132. 
Marston near Oxford. 
L. Saucers globular, hollowed at the top; blackish green : 
foliage blackish, gelatinous, convex, lobed, some- 
_ what scolloped. a ai sig 
Dill. 19. 28. : 
Fix by the centre. Leaves or shoots variously divided, con- 
vex above, concave below, the ends with small indentations ; 
hardish, gelatinous and pellucid when viewed against the light, 
dirty green, black above when dry and grey underneath. ‘The - 
leaves are proliferous, but not jointed. Ditt. Lot L. fuviati- 
lis, Gmel. syst. veg. 
_ On stones under water in alpine rivulets. Ina stream coming 
out of Malham Cove, Yorkshire, and in the rivulets on Snow- 
don. Ditz. [On stones in the river Elwy, about half way from 
the ford opposite the cave to Pont-newydd, four miles from Den- 
bigh. Have but lately found it in fruit. Mr. Garverre. On 
stones under water in the River Isla, Angus-shire. Mr. Brown. ] 
. re Jan.—Dec. 
TREMEL'LA: Substance gelatinous, transparent, 
uniform, lobed. a 
Seeds dispersed through the jelly-like sub- 
_ Stance, : 
Oss, it differs from the Gelatinous Licuens in having neither 
Tubercles nor Saucers. 
Tr. Whitish ; sitting, jelly-like, of various shapes. Huns. 
565. Se 
Bull. 386. 
Sometimes with a tinge of sea-green, and yellowish, some- 
what wrinkled, solid, semi-transparent.. Huns. 
On the half rotten, fallen branches of trees, in thick woods, 
and on moss, _ A, Sept. —May. 
Tr. Grey; white within ; sitting, membranaceous, laby- 
; rinth-like. Dicks. 14. : 3 
Act. nov. Helm. dan. p. 286. f. 1. 
_ Becomes hard when dry. Dicxs. 
On rotten roots of Allium Cepa; A, fistulasum, &e. | : 
