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POROCYPHUS | EPHEBACE® 
Orprr Til. KPHEBACEA. 
Thallus more or less gelatinous when moist, minutely fruticose 
or filamentous, crustaceous or partly squamulose, corticated or 
non-corticated. Algal cells Myxophycez (Scytonema or Stigonema). 
Apothecia rather small, discoid, with a proper margin (lecideine) ; 
spores 8 in the ascus, colourless, simple or septate. Spermogones 
partly immersed in the thallus, with simple or septate sterigmata 
and minute ellipsoid acrogenous or pleurogenous spermatia. 
The lichens of this Order belonging to the British Flora are 
crustaceous, minutely shrubby or filamentous, and slightly gelatinous 
when moist. The alga is a species of Scytonema, with cell-rows in 
one series, or of Stigonema, with the cell-rows in several series. 
The resulting lichen is of a somewhat stouter texture than the 
alga. They are all somewhat uncommon. The crustaceous lichen 
Magmopsis argilospila Nyl. included by Crombie among Ephebacei 
(Monogr. i. p. 29) should be classified among Pyrenidiacee. The 
following genera are British :— 
Thallus with Scytonema. 
MFA TE CHUBUACCOUG. .« ssscnpseceaes eevebeseesis aan en 8. Porocyphus. 
Thallus minutely fruticose. 
Filaments without a cortex ..............4 9. Thermutis. 
Filaments with cellular cortex. 
Apothecia moderate in size, spores 
E-REDUBUC esto nance nse ccnsesedowseneawsl« 10. Polychidium. 
Apothecia minute, spores simple.... 11. Leptogidium. 
Thallus minutely squamulose - coralloid ; 
spores 1- or more-septate .........0ccceccscese 12. Placynthium. 
Thallus of larger Lichina-like fronds, fructi- 
PeeOM UT MMOWD Ss o253seiepccscenatsies sencavesccees 13. Schizoma. 
Thallus with Stzgonema, fruticose. 
Filaments minute, apothecia black............. 14. Spilonema. 
Filaments somewhat elongate, apothecia 
pale. 
Thallus not spiny, apothecia without 
SIE PEECVEOR 2.08 5cct chin cron sive onthe te dckoie te 4p 15. Ephebe. 
Thallus with spiny branchlets, apothecia 
WEL DEtADNVSOSy< 4... seanietse wan seneanad- 16. Ephebeia. 
8. POROCYPHUS Koerb. Syst. Lich. Germ. p. 425 (1855). 
(Pl. 8.) 
Thallus crustaceous, continuous or areolate or granular, non- 
corticated, slightly gelatinous. Algal cells Scytonema. Apothecia 
very small, immersed, closed then open, with a stout thalline 
margin; paraphyses slender, discrete ; asci rather irregular in 
form, often bent or twisted, 8-spored; spores ellipsoid, simple, 
colourless. Spermogones immersed, almost globose, with acro- 
genous short or elongate ellipsoid spermatia. 
1. P. areolatus Koerb. Syst. Lich. Germ. p. 425 (1855).— 
Thallus granular-areolate or somewhat continuous and thinnish, 
