— 76 — 



nigricans v. obscure olivaceum , lamina et hypotheciutn hyalina ; asci 

 obovoideo-cylindrici, 8-spori ; sporœ oblongœ, 8-13 p. tantum longse, 

 4-6 pt. latse. — Primo inluitu vix nisi in eo a Lecanora talcarea v. 

 concreta (e. g. Fries exs. n. 397) clistinguenda quod thallus magis 

 diffractus, apothecia nascentia haud urceolato-impressa, evoluta 

 regularia et coerulescenti-atra. Sporarum minuties autem et ambitus 

 angustus omnino differunt. Ab affini L. bomaloplaca Nyl. Lich. 

 Angol. , p. 7 differt thallo crasso, colore apothecioruin et forma spo- 

 rarum. — Habitat calcicola in deserto Wadi Cberese : Schweinf. 



35. L,. (sect. Aspicilia) calcarea f. HofTiiianni Nyl. 

 Scand., p. 154, calcicola prope Alexandriam. Ehrenb. 



— — f. farinosa Nyl. Licb. Ehrenb., p. 63, calcicola ad Kas- 

 reschdaebi et Gasser : Ehrenb. 



36. L,. (sect. Aspieilia) rliizopliora Mûll. Arg., Urceolaria 

 riiizophora Del. Flore d'Egypte, p. 155, t. 59, fig. 3, et Florse aegypt. 

 Illustr., p. 32, n. 979, thallus pallide testaceus , areolato-diffractus, 

 areolis concavis, margine in zonam pallidiorem subinde dendritice 

 sublimbriatam quasi lavato-extenuatus; apothecia aspicilioideo-innata, 

 fusca, nuda ; asci cylindrici, 4 - spori ; sporœ 25-30 ^ longœ, subglo- 

 bosse. — Proxima Lecanorœ calcarese, prsesertim varietati ochraceae, 

 sed thalli colore et apotheciis nudis distincta. — Habitat ad lapides 

 silaceos in Vallée d'Egarement : Delile (hb. Del.). 



37. Lecania erysîbe Mûll. Arg., Lecanora erysibe Nyl. Scand. 

 p. 167. 



Var. încusa; Biatorina proteiformis v. Rabenhorslii *incusaKoerb. 

 Parerga, p. 140; Lecanora erysibe Nyl. Lich. Elirenbg., p. 62; ad 

 sccundam Pyraraidem Gyzeh : Del. (hb. Del. et hb. Deless.), prope 

 Columnam Pompeji et prope Abusir ad lapides oolithicos : Ehrenb., 

 nec non in calcareis montis Makkatan prope Cairo : Schweinf. — 

 Hujus thalus vulgo crassus, grossius gleboso-verrucosus, pallidus 

 V. fuscescens V. cervino-fiiscescens, plus minusve cœsio-pruinosus ; 

 apothecia pruina fugace adspersa. Grassities thalli valde ludit. 



V. piiij^iiiusciila Mfill. Arg. , Pai'melia pinguiuscula Del. 



Flore d'Egypte, p. 159, t. 59, fig. H et 11*, Florœ aei^ypt. Illustr., 

 p. 32, n. 982; Lecanora pinguiuscula Nyl. Lich. Ehrenb., p. 63. 

 A praicedente varielate non differt nisi thallo fusco v. nigro-fusco, 

 i. e. magis quam in illa obscurato. — Habitat in summitate Pyra- 

 midis seoundae Gyzeh : Del. , Ehrenb. , et ibidem supra residua coe- 

 iiientilia circa pyramides passim : Larbal. 



38. L.. albai'iolla v. corustaeca ; Lecanora albariella v. 

 ecrustacea Nyl. liich. Ehrenb., p. 63 ; ad lapides oolithicos frequens 

 pi'ope A.busir et Alexandriam : Ehrenb. 



V. siiltca'sia ; Lecanora albariella f. subc;esia Nyl. Lich. 



Ehrenb., p. 63, et Licii. aegyp. Larbalest., p. 283, n.9; prope Abusir: 

 Ehrenb., et supra calcem nummiliticam inter Pyramides et tumulos 



