71 
GENUS 94, PERICHANA.* FR. 
Peridium simple, submembranaccous, persistent, naked, often 
splitting horizontally in the middle. Flocci few, not spiral. 
1.—Perichena quercina Fr. Syst. Myc. III, p. 192. On ash 
trees, Batheaston. 
2,.—Perichena populina Fr. Grey. t 252. On fallen poplars, 
Langridge. We have 2 out of 3 British species. 
GENUS 95. LICHA.t SCHRAD. 
Peridium thin, membranaceous, even, bursting irregularly, spores 
not mixed with flocci. 
1.—Licea fragiformis Fr. Grev. t 308. Bowood. On very 
rotten wood. 
2.—Licea applanata B. Batheaston, on sloe bushes. Berk, in 
“* Hooker’s Journal of Botany,” IV., p. 67. Two out of four 
British have occurred here. 
GENUS 96. PHELONITIS.{ Chev. 
Peridium papyraceous, persistent, commonly splitting hori- 
zontally in the cantre. Spores large, rough. Phelonitis strobilina 
the only British species grows on fallen fir cones. It has not 
been found in this district. 
From the foregoing list it appears that only 45 species have 
been found in this district out of 103 recorded as British in Mr, 
Cooke’s Handbook. Much, then, remains to be done, although 
many species which occur on fir wood, especially in the old Scotch 
forests, can scarcely be expected here. Another reason for the 
paucity of our numbers arises probably from insufficient data to 
goon. I mean the paucity of good figures, especially of minute 
details, which is essential to the determination of plants so 
diminutive and nearly related in the present state of natural 
science. 
* Perichzena, from peri around, and chaino to gape. 
+ Licea of uncertain origin. 
~ Phelonitis, perhaps from phainoles a cloak. 
