con’ fluens. 
¢ 
CRYPTOGAMIA. ALG, Lichen. B. (2) Crustaceous; 
with TuBERCLEs. 
Var, 2. Tubercles larger, more elevated, white within, 
border grey white, scolloped, crust grey white. 
Facq. call. ti. 14. 5. bd. . 
imens from Mr. Griffith, agreeing well with the fi s 
of Foci but without the leaf-lik € appearance represented at 
the edge of it. ser : 
On fine grained granite. : is 
L, Tubercles very black, not bordered, distinct when 
young, confluent when old: crust blue grey, pale 
rown or white. | 
Web. 2-Hoffm. lich. 19.1. 
Crust grey, a line or more in thickness, wide spreading, 
cracked, white when broken. Tudercles very black, coalescing, 
so as often to cover the whole of the crust. Horrman. Tuber- 
cles cracked on the surface, sunk in the crust; oftener rather hol- 
lowed than raised, and then obscurely bordered with a smooth 
black edge. Crust grey throughout, sometimes growing on a 
‘thin-spread black ground. 
Var. 2. Surface reticulated. 
Mich. 54, ord. O14 fess 
Rocks, England. Dicxs. 9.—Scotland. Dr. J. E. Smrra. 
[ Garreg. wen, on limestone rocks; not common. Mr. GrirrFitu. | 
Var. 3, Tubercles globular; crust grey white. 
~ Lich. pilularis, (which see.) ae 
_ Var, 4. Crust rough, brown, much cracked: tubercles flat 
topped, , 
Ss stones upon Bettws mountain, Denbighsh. Mr. Gris- 
FITH, = 
Var. 5. Fructifications saucer-like, changing to large black 
tubercles ; crust brown, granulated; granulations large, resem- 
bling tubercles, i ; 
Specimen from Mr, Griffith; growing on Schistus. The 
crust has a pale brown outer coat, which within has a greenish 
cast, covering a white matter which forms the principal substance 
of the crust. It is granulated and cracked on the surface; the 
granulations large, somewhat elevated, and not unlike tubercles. 
‘The fructifications are at first like saucers with a brown border ; 
this soon disappears, and they rise up in the form of large black 
nearly globular tubercles; = st peat yt 
‘This curious specimen seems to shew that the Lichens confluens, 
and pilxlaris are the same plant under somewhat different cir- ~ 
cumstances of growth. Mr. Griffith also suggests, that our 4th 
var, may be the L. piznatus of Dickson, which I think pro- 
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