16 
coral’linus. 
Perellus. 
CRYPTOGAMIA. ALG, Lichen. B. (2) Crustaceous, 
with TUBERCLES. 
Dicks. h. s—Hoffm. lich. 11. 1-E. bot. 225—Dieks. 2. 1. : 
Differs from L. ventosus in the crust being mealy, not warty, 
hard and smooth, and in the tubercles being immersed ; of a 
very bright red with mealy edges..Dicxs. ‘The greenish brim- 
stone colour of the crust is not permanent. __- 
On the stones of Stone Henge, Wiltshire. [On sandstone ~ 
in Roslin wood. Mr. Brown. | 
B. (3) Crustaceous, with Saucers. 
L. Saucers white, very minute: crust forming cylindrical 
level-topped bundles ; the extreme edge rather leaf- 
like. oo = 
= Hoffm. enum. 4. 2-Facq. coll. ti. 13. 2. 
Similar to L. calcareus. Crust very thick, and when broken 
appearing composed of threads resembling coral ; the ends round- 
ed, without tubercles. Linn. Crus¢ thick, white, broad spread-__ 
ing on the rocks, appearing as if composed of small branches, 
and when broken the branches appear distinctly, their tops form- 
ing the surface of the crust. Tubercles only on the old speci- 
mens, hardly visible to the naked eye, alittle hollowed. Besides 
these tubercles there are minute convex black dots on the crust. 
Weser. Crusta line in thickness, snow white, greyish with 
age, bearing on its surface little pillars like coraline, 2 a line 
high, convex at the ends. Jacg. coll. ii. 180. 
Rocks, stony places, and mountainous heaths in Wales, the 
north of England, and in Scotland, P. Jan.—Dec. 
L. Saucers white, Mealy, with ycllowish white, thick, 
blunt borders : crust yellow white. fg ae 
Dicks. b. s—Hoffm. enum. 6. 2=Dill. 18. 10-Hoffm. lich. i. 
12. 5-8. bot. 727—-Pet. muse. f. 79. as i. 
Crust thick, warty, white in its fracture, reddish when wet 
and rubbed to powder. Saxcers numerous, whiter than the warts, 
bular but depressed in the centre, larger and flatter with age. 
OFFMAN. Crust wrinkled, ‘granulat stony to appearance, 
net gritty, when chewed, but rather tough ; yellowish when cut. 
Saucers like crab’s eyes, whitish. Ditt. ote 
_ Rocks, walls, stones, trunks of trees. [Malvern Hills, Wor- 
cestershire, St. On the smooth bark of a beech in Hertford- 
shire. Mr. Woopwaro. Saltash Ferry near Plymouth, on slate, 
1D SIME QOS) ote iesld deanna do. REPO Oe 
* Litmus is prepared from this species. "For thi it is ga- 
pat from the aus in the north phniianl, ma core en 
