44 NOUVELLE CLASSIFICATION 
Trib. XV. Lecidinceæ. 
Apothecia biatorina vel lecideina. 
Homalea, Nyl. — Biutora, Fr. — Gyalecta, Ach. 
— Lecidea, Yr. — Gyrothecium, Nyl. (Psoram, 
Fiot. includens). —Abrothallus, DN. — Scutula, 
Tul. — Celidium, Tul. — Phacopsis, Tul. 
"Trib. XVI Graphideæ. 
Apothecia difformia lirellina, thalamium vel e paraphy- 
sibus veris vel indistinctis formatum. Sporæ septatæ, raro 
simplices. 
Xylographa, Fr. (salt. pr.p.) — Opegrapha, 
Humb. — Stigmatidium, Mey. — Glyphis, Ach. 
— Chiodecton, Ach.—Arthonia, Ach. pr. max.p. 
(huc quoque Coniangium, Fr. et Contocar- 
pon, Fr.). 
Series VI. NUCLEIFERE. 
Thallus peltatus vel crustaceus (squamosus, areolatus, 
granulosus, pulvereus) vel in formis inferioribus hypo- 
hlæodes (sive Some h.e. gonidiis inter particulas 
superficiei saxi immixtis) vel rarius nullus. Apothecia nuclei- 
formia vel thallo inclusa vel emersa, thalamium vel para- 
physibus nullis vel distinctis. 
Trib. XVII. Porincæ. 
Thallus crustaceus. Apothecia thallo inclusa, epithecio 
poriformi. Sporæ maximæ episporio crasso cinctæ, paraphyses 
longissimæ ramosæ. Mucilago hymenea iodo cærulescens. 
Pertusaria, DC. 
Trib. XVIII. Endocarpew. 
Thallus peltatus, crustaceus, hypophlæoïdes vel nullus. 
Apothecia nucleo consistens in sicco pallido vel albo, peri- 
