336 BRITISH DISCOMYCETES. 
base, as if arising from a common stroma. In Tympanis 
they approach Patellaria ; in Heterospheria they simu- 
late Spheria ; in Dermatea they have some likeness to 
Helotiwm ; but attention to the texture and fructification 
will prevent the possibility of error. 
Name—from the typical genus Dermatea. 
ARRANGEMENT OF THE GENERA. 
‘I. Encelia. Fries. IV. Tympanis. Fries. 
II. Dermatea. Fries. V. Crumenula. De Not. 
Ill. Cenangium. Fries. VI. Ephelis. Fries. 
Key To THE GENERA. 
Receptacles seated on an effused horny crust .. Ephelis, 
Receptacles corky or granular; flesh generally 
brown an ais as 8 BS .. Dermatea. 
Receptacles coriaceous; sporidia filiform .. «. Crumenula, 
Receptacles coriaceous; sporidia oblong .. .. Encelia. 
Receptacles horny or coriaceous, the base more or 
less prolonged below (so that they are not globose, 
as in Heterosphzria) we e . 1 
Receptacles black, very rarely mealy on .. Tympanis. 
: cone rarely quite black, generally mealy .. Cenangium. 
. oe 
Genus I—Encaia. Fries. 
Cups sessile, at first closed or nearly closed, at length 
Open, concave, more or less coriaceous; externally fur- 
furaceous or naked; sporidia 8, oblong; epiphytal. 
(Plate X. fig. 64.) 
Name—é», within, and xétAoe, hollow 
Only three British species. 
Key To THE Species. 
Externally blackish .. os si oe « 1 
Externally pale tan .. és ne on «. furfuracea. 
eae rugose.. on oe oe +. fascicularis. 
* (Externally verrucose .. ane os ae -» Bloxami. 
1. Encelia fascicularis. (A. and 8.) 
Ceespitose, rarely solitary, sessile, leathery mem- 
branaceous, irregular, rugose, blackish ; externally rather 
mealy ; hymenium concave, dark bay-brown, becoming 
paler; asci cylindraceo-clavate ; sporidia 8, oblong, 
