440 Dr. E. Stizenberger on the Saxicolar Species of Opegrapha. 
ageregata, sessilia, minuta, linearia (0°3-1 millim. longa, 0:2 mil- 
lim. lata), seepius trifurcata, recta v. curvula, nigra; epithecio 
angusto, margine tumido, inflexo, splendente. Hymenium (ca. 
50 mik. altum) vel hyalinum vel viridi-flavescens e paraphysibus 
dilutis et ascis pyriformibus pariete apicali incrassato (40-45 mik. 
longis, 18 mik. latis) compositum. Sporze 8°, 3-septatee, hya- 
linee (14-16 mik. longee, 5-7 mik. crassee). Hymenium tinctura 
iodii vinose rubens. Spermogonia non reperta. 
In rupibus Italie superioris, Helvetize, Franconiz. 
Var. Chevallieri (Leight.). 
O. Chevallieri, Leight. Brit. Graph. p. m. p., minime O. sazatilis, B. prui- 
nosa, Korb. Pg. Exs. Leight. 67. 242; Anzi, Etr. 37. 
Thallus effusus, tenuis, tartareus, interdum rimulosus, albus vel fla- 
vescens, raro deficiens. Apothecia sessilia, insulari-aggregata, 
lineari-cylindrica (0°1—0°2 millim. latze, longitudinis varie), cur- 
vula, utrinque obtusa, simplicia vel ramosa vel stellatim conferta, 
nigra; epithecio anguste rimiformi, margine tumido splendente. 
Hymenium (ca. 55-60 mik. altum), hyalinum e paraphysibus sat 
distinctis et ascis pyriformibus (40-50, raro 60 mik. longis, 
18 mik. latis) compositum. Spore 8®®, elongato-ellipticee, 3-sep- 
tatee, hyalinee (14-18 mik. longze, 4-6 mik. crassee). Hymenium 
tinctura iodii vinose rubens. Spermogonia nigra, punctiformia. 
Spermatia cylindrica, recta vel curvula (8 mik. longa vix 1 mik. 
crassa). 
In saxis calcareis Italie, Dalmatiz, Galliz, Angliz, Cypri. 
f. heteromorpha, Hepp. 
O. Chevallieri, Leight. et Mudd, p.p. O. Chevallieri forma Ny]. Armor. 
Thallus obsoletus. Apothecia majora (3 millim. longa, 0-4 millim. 
crassa) utrinque subacuta, simplicia vel ramosa, recta vel curvata, 
interdum congesta, nigra. Epithecium nonnihil dilatatum. Struc- 
tura interna sicut in var. Chevallieri. Spermogonia crebra. 
In saxis schistosis Gallize et Hibernize ad litora maris. 
6. Opegrapha confluens (Ach.). 
O. dege, B. confluens, Ach. Univ. O. vulgata v. steriza, Nyl. Gall. 
O. tesserata, Bagl. O. conferta, Anzi. Exs. Nyl. Paris, 144; Anzi, 
Etr. 36; Rbh. 339; Erb. Critt. 396, 695. 
Thallus effusus, tenuissimus, griseo- -viridis, seepius obsoletus. Apo- 
thecia sessilia, simplicia, nigra, opaca, crasse cylindrica (1-2 mil- 
lim. longa, 0°25-0°5 millim. crassa), recta vel seepius curvata vel 
contorta, rarissime solitaria, sparsa, vulgo conferta vel conglobata ; 
epithecio anguste rimiformi, ztate subdilatato, margine primum 
rotundato, inflexo, mox acuto. Hymenium (ca. 60 mik. altum) 
hyalinum, in hypothecio nigro, e paraphysibus liberis septatis 
ramosis superne capitatis infuscatis et ascis crasse claviformibus 
(55 mik. longis, 18 mik. crassis) compositum. Spore 88, 
elongato-ovales vel solezeformes, 3-septatze, vulgo hyalinze (15-20 
