332 REVISION OF THE BRITISH COLLEMACEI. 
and the gonimia in globular cells. Sp. 1. P. hematopis (Smmrf.), 
distinguished very readily from the following by its urceolate apo- 
thecia. Sp. 2. P. 
and its ridges, and formerly not rightly distinguished by me from the 
, preceding. « 3 : ; 
protracted search. Sp. 4. P ; 
rightly-developed fructification, my specimen from Ben-y-gloe (vid. — 
‘*G 
3revillea,” I., p. 170), though sufficiently resembling this species 
llema, a 
ture of the thallus it approaches to Phyllis id 
I. Collemopsis, Nyl. This is sufficiently distinct from the preced- 
ing in having the thallus internally glaucous-green, and the gonimia 
Ex | j 
submoniliformly arranged. . C. Schereri (Mass.); beautifully 
developed on limestone of Craig Tulloch in Blair Athole, and muc 
less so on chalk pebbles near Shier rrey, whe 
the Irish or Pyrenean plants. Sp. 3. C. furfurella, Nyl., removed 
ime Collema to the present genus, with the characters of which it 
agr 
_“*Grevillea,” IIT., p. 22), a very interesting, though somewhat pecu- : 
liar-looking species, allied to C. Arnoldiana (Hepp.) Sp. 5. C. ie 
. diffundens, Nyl., apparently an extremely rare plant, for which we tag 
have searched in vain the neighbourhood of Maidstone, where it was a q 
originally gathered very sparingly by Admiral Jones. 
III. Synalissa, DC. Sp.1. 8. symph C 
now to be extinct in both the recorded British localities. 
IV. Collema, Ach. This enus is now somewhat limited by the 
abstraction of some species formerly included in it, not merely to the 
preceding but also to the following genera, in which they find a more 
natural place. It may be divided into these sections :— 
a ra eas ee 
ae 
A, Lichinopsis, Cromb.=stirps C. lichinodet. 
bapa d lichinodeum, N yl. Probably this species belongs to a 
distinct genus, which may be named as above, though as the fructifi- 
cation is at present entirely unknown, it is best retained as constitutimg 
4 separate section of Collema, 
B. Physma, Mass. a, stirps C. myriocoect. : 
Sp. 2. @. chalazanum, Ach.., distinguished from its allies ¢ “73 
by its ellipsoid spores ; rather local and not common where it oie 
in W. Britain and 8.W. Ireland. Sp. 3. 0. chalazanodes, Nyly it~ 
