190 A. HUE. 



munis in Neuslria et in Britannia-Minore (ubi supra vctuslum corium, vilreum oviumque stercora 

 nata est), minus frequens in Lofharingia ac in Burgundiit' Comilatu, non rara in Lulelia; Pari- 

 siorum viciniis afque observata in Fonte Dellaqueo silva (Seine-et-Marne) et in regionibus 

 Limovicensi et Monspeliensi. 



**. — Thallus endolithicus. 



821. Lecidea albopruinosa Hue; Biatorina albopruiiiosn Ain., Lich. frcinkisch. 

 Jura, in Flora 1859, p. 15:2; Blastenia albopruinosa Th. Fr., Bidrag Skandinav. 

 Lnfflor., in Vet. Akad. Forhandl., 1864, p. 272, et Lichenogr. scand., p. 349 ; Lecanora 

 albopiniinosa Stizenb. Lich. helvet. (1882), p. 101 ; Placodium Agardltianum var. albo- 

 pruinosum Ain., loc. citât., 1860, p. 69. 



Thallus albidus velalbidocœsius, tenuis, opacus, continuus, in superficie rugulosus, epili- 

 thicus ac inferne endolithicus, liydrate kalico immutatus, plagulas determinatas œquatasque 

 inter alios lichenes efficiens ; intus simul cum apotheciis granulis calcariis ac parvis oxalatis 

 calcici cristallis omnino repletus. Cortex 20-40 [i. crassus ; in eo hyphœ intricatee, passim 

 verticales, arcte coadunatœ, articulatae articulis oblongis aut sphœroideis, lumine 2-4 [j. lato, 

 paiiete tenui et sursum indurato, atque strato cellulas protoplasmate orbatas, 10-20 a crasso 

 tectœ. Gonidia protococcoidea, obscure \iridia, 10-18 [x lata, membiana parum crassa, stra- 

 tum crassum sub cortice formantia ac in medullam descendentia. Hyphœ niedullares oblongo 

 seu sphœroideo articulafœ, lumine 2-4 \x lato, intricatee, meatus ac stratum crassum prae- 

 bentes. Apothecîa 0,5-0,8 mill. lata, vel dispersa et rotunda, vel pauca contigua angula- 

 taque, in petia paulum foveolata intrusa, in basi non constricta, perithecio atrato et laevi, 

 nudo aut thallo albo \estito, margine tenui, integro ac non prominente atque disco fusco 

 atro, madefacto pallido fusco, piano demumque convexo, sive nudo, sive albo pruinoso 

 instructa. Perithecium extrinsecus atrum, hydrate kalico violaceum et triplice D'''^ Guéguen 

 reagente sordide rubescens, in margine flabellatum, lateraliter 50 ac subtus 40-00 a crassum ; 

 in eo hyphœ fastigiatœ, arcte coalitœ et articulatœ articulis sphœroideis seu oblongis et peri- 

 pheriam versus paulum dilatatis, lumine 2-3 jx lato. Hypotheciumincoloratum, iodo cœruleum, 

 ex hyphis horizontalibus, in centro intricatis atque in ipso vincturœ puncto, ut solet, ver- 

 ticalibus, simul oblongo et sphœroideo, imo sphœrico articulatis constitutum. Gonidia intra 

 hypothecium nulla; sub eo hyphœ intricatœ stratum medullare crassum, in quo summo 

 pauca gonidia raro vigentia efficientes. Paraphyses hyalinœ, sursum pallido fiiscœ, hydrate 

 kalico violaceœ, 100 [jl altœ, 4-5 [i. crassœ, rectœ, arcte cohœrentes, articulatœ articulis 

 4-6 (JL longis, septis crassis et lumine 2 [x lato, ultimo articulo sphœroideo, 5-7 a crasso, 

 lumine 3-4 [i. lato et penultimo paulo angustiore, apicem versus passim furcatœ et iodo 

 cœruleœ. Theca sporas adhuc juvéniles continens, 70 ix longa, 16 a lata, in apice breviter 

 incrassata et in basi longe caudata ; bene evolutas autem habens, ventricosa, 60 jx longa, 

 22 [X lata ac breviter caudata, massa sporali sursum apiculata ; sporœ octonœ, hyalinœ, dis- 

 tichœ, simplices et polocœlœ, cavernulis 4-5 [x longis et tubulo angusto junctis, 12-16 (x longœ 

 et 7-10 (xlatœ. 



Hla diagnosis ex exsiccato Arn. n. 50 b., specimine supra sa\a calcaria prope Eischtiitt, in 

 Bavaria, anno 1803 ab eo lecto provenit. 



— var. Agardhiana Hue; Parmelia Agardhiana Schœr. Lich. helvet. Spicileg., II, 

 sect. VIII, 1839, p. 394; Lecanora Agardhiana Schœr. Enum. critic. Lich. europ. {ISoO), 

 p. 76, non Ach. Sgnops. method. Lich., p. 152; PgreJiodesmia Agardhiaria Mass., 

 Monograf. Lich. blasteniosp., p. 120, in Atti Istit. se. lett. ed arti, 3 ser., t. IV, 

 fasc. 2, 1852, Append. 3, et Kœrb. Parerg. lichenolog., p. 67; Callopisma Agardhiamim 

 Kcerb. System. Lich. Gcrm. (1855), p. 131; Placodium Agaj^dhianum Hepp, Flecht. 



