62 CRYPTOGAMIA ANTARCTICA. [Auckland and 
Has. Lord Auckland's group; on the leaves of Panas simplex, Forst. 
Macule omnino superficiales, orbiculares, epiphyllee, 2 lin. late, opacee, olivaceo-nigre, Lichenem parvum Fu- 
cumve referentes, lobate, lobis apice dilatatis e filamentis approximatis constantibus. 
This pretty species, which was unfortunately not found in fruit, resembles somewhat Rhytisma quercinum, 
Rudolph, for which I am indebted to Dr. Montagne. That species, however, originates beneath the cuticle, while 
this is, I believe, entirely superficial. The ramification is different, the tips of the branches being dilated in a fla- 
bellate form. The stroma, also, consists of approximated threads, not of an irregular cellular membrane. This struc- 
ture is almost identical with that of Myrionema punctiforme, Harv., except that the filaments are there much branched, 
which I do not find to be the case here. 
This species is accompanied with another in a very imperfect state, and which may be a species of Dothidea. 
Prare LXVIII. Fig. VIT.—1, leaf of Panag, with fungus, of the natural size; 2, portion of the same, magni- 
fied; 3, filaments, very highly magnified. 
8. HYSTERIUM, Tod. 
1. Hysrerrum dreve, Berk.; peritheciis brevibus ellipticis nigris prominulis, rima angustissima, ascis 
linearibus elongatis. (Tas. LXVIII. Fig. VIII.) 
Haz. Campbells Island; on the dead leaves of Uncinia: Hookeri, Boott. 
Perithecia minuta, nigra, nitida, prominula, breviter elliptica, raro utrinque apiculata, rima angustissima. 4sei 
elongati, lineares, paraphysibus filiformibus rectiusculis immixti, sporidiis filiformibus. 
This species is manifestly different from the small form of H. culmigenum, and the nature of the asci and para- 
physes are further distinct, being in the latter plant shorter and of a different form, with the apices'of the paraphyses 
curved or curled. The apiculate extremities may not prove to be a constant character, though the probability is that 
it will, at least in full grown specimens. 
Prate LXVIII. Fig. VIII.—1, leaf and fungus of the natural size; 2, portion of the same; 8, perithecium 
shewing the contained asci; 4, ascus; all more or less magnified. 
9. AYLOGRAPHUM, Libert. 
1. AxrocnaAPHuM Bromi, Berk.; peritheciis simplicibus filis arachnoideis comitatis, sporidiis oblongis 
uniseptatis medio constrictis. (Tas. LXVIII. Fig. IX.) 
Has. Lord Auckland’s group; on the leaves of Bromus antarcticus. 
Mycelium arachnoideum, fuscum, quandoque abundantius et sterile, in maculis autem fertilibus parcum. Peri- 
thecia minima, oblonga, brevia, recta v. curvata, simplicia, atra, nitida. sci brevissimi, obovati, tenerrimi. Spore 
octone, oblongo-elliptieze, medio constricte, uniseptatze. 
The species of this genus, which has principally been investigated by Madame. Libert, resemble extremely mi- 
nute Opegraphe. The present individual approaches the 4. junceum, but differs from it and from all others by the. 
septate sporidia. The perithecium easily breaks up into its elemental cells, and such 1 find to be also the case with 
some of Madame Libert's species; while, in others, the cellular structure is more permanent and forms a beautiful 
microscopie object. 
PravE LXVIII. Fig. IX.—1, a portion of leaf and fungus, of the natural size ; 2, perithecium, magnified, showing 
the contained asci; 3, ascus; and 4, sporidia :—highly. magnified. 
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