724 Pyrenomycetese, Sphaeriaceae, Phaeodidymse, Tichothecium. 



rilheciis nigris, rnaculiformibus, sparsis, nucleo albofarctis; para- 

 physibus distinctis, laxis, flexuosis mucosisque; ascis brevibus, cy- 

 liudraceis, 4-sporis, ad utramque extremitatem sporidiorum con- 

 strictis; sporidiis subrotundis vel late oblongi;^, irregularibus, pro- 

 toplasmate obscure brunneo v. fuligineo farctis, indistincte bilocu- 

 laribus, 10 s 6. 



Ilab. in thallo Squamariae gelidae in Britannia. 



2. Tichothecium perpusillum (Nylander) Arnold Licheuol. Fragm. XVI, 296? 

 pag. 27 et in Wint. Hedw. 1886, pag 17, Endococcus perpusil- 



lus iNyl. Kxsposit. Pyrenoc. p. 64. — Peritheciis minutis, sessili- 

 bus, fere globosis, ostiolo haud impresso, indistincte pertuso, atris, 

 opacis, scabris, 0,1-2 mm. diam. ; ascis elongato-clavatis vel fusi- 

 formibus, 8-sporis; sporidiis ellipticis, medio haud constrictis, sa^pe 

 parum curvatis, utrinque attenuatis rotundatisque, dilute fuscis, 

 15-21 ^ 6-7. 



Hab. in Aspicilia cinerea et A. gibbosa in Germania et 

 Britannia. — Teste Cl. Leighton, Lichen. of Great Brit. Edit. III, 

 pag. 496, perithecia sunt niinutissima, immersa, deprewse globosa, 

 atra; sporidia octona, obionga, fusca, bicelluiaria, 14-19:^6-7, 



3. Tichothecium Stlgma Korber Parerga Licheaol. p. 468 et Wint. in 296.3 

 Hedw. 1886, pag. 16. — Peritheciis minutissimis, punctiformibus, 

 immersis, demum parum prominulis, atris, opacis, ostiolo indistin- 

 cto, supra thallum dispersis; ascis clavatis vel fusiformi-clavatis, 

 8-sporis; sporidiis ellipticis, utrinque acutiusculis, medio saepe sub- 

 constrictis, bicellularibus, interdura cellula superiori parum raajori, 

 fuligineis vel dilute rufo-fuscis, 14-20-5-6. 



Hab. iri thallo Rhizocarpi geographici et PsoraB lara- 

 prophorae in Germania. 



4. Tichothecium macrosporum Hepp in litt. sec. Arnold Lichenol. 2964 

 Ausfl. 111, p. 960 et Wint. in Hedw. 1886, p. 17. — Peritheciis 

 initio omniuo iramersis, demum vertice prominulis, globosis, atris, 

 poro distincto pertusis, circ. Vio "^"^- diam., plerumque gregariis; 

 ascis obloDgo-clavatis, deorsum longe attenuatis, 8-sporis, 60-65 ^ 

 17-21; sporidiis subdistichis, elliptico-oblongis. utrinque attenuato- 

 rotundatis, uniseptatis, haud v. vix constrictis, fuscis, 16-24^:6-8. 



Hab. in thallo Rhizocarpi geographici et R. alpicoli 

 in Germania. 



5. Tichothecium Arnoldi (Hepp) Korber Par. Licheuol. p. 469, Wint. 2965 

 Hedw. 1886, pag, 16. — Peritheciis miuutissimis, punctiformibus, 

 confertissime stipatis, immersis, globosis, ostiolo indistiucto, atris, 



