— 75 — 

 ambitu multo latiores, epithecio nonnihil coerulescenti-fascescente 

 (nec olivaceo) , margine apotheciorum tenuiore et colore disci. Sporse 

 ut in L. Aganlhianoide sed discus apotheciorum madefactus statim 

 pallidior sublividus. Apothecia in speciminulo aegyptiaco tantum 

 î/5 - 1/4 mm. lata et tliallus fere obsoletus. 



31. L.. uiiibrina v. eyaneseeiis Nyl. Lich. aegypt. Larbal., 

 p. 283, supra truncos arborum in Delta parce : Larbal. 



32. L. (sect. Aspîcilîa) subcoerulea MùU. Arg.; Urceolaria 

 subcoerulea Del. Flore d'Egypte, p. 154. t. 59, fig. 1, et Florae aegypt. 

 Illustr., .p. 32, n. 977. Sporse in ascis octonse, 12-15 pi longœ et 7-8 pi 

 lataB. — Affinis est L. Cheresinse sed tota longe minus albida et apo- 

 thecia nuda, cseterum consimilia, i. e. similiter a«picilioideo-innata, 

 demum niodice emergentia ; sporarum anibitus dein alius, se. ellip- 

 ticus ut in Placodio radioso habitu accedente , a quo jam thallo non 

 vere placodioideo et omnibus partibus gracilioribus et apotheciis 

 aspicilioideis differt. — Crescit ad saxa dura silacea in Vallée de 

 l'Egarement. Del. (hb. Del.). 



33. L. (sect. Aspicilia) Clieresiiia Mûll. Arg., thallus 

 crassus (1-2 mm.), albus v. nonnihil coerulescenti — v. etiam sub- 

 flavicanti-albus, orbiculari-evolutus sœpeque sat regulariter radiatim 

 simulque concentrice rimoso-diffractus, ad marginem extenuatum et 

 subadplanatum spurie effigurato-lobatus, areoko plano-convexaj , 

 primum Ipevigatœ; apothecia innata, haud depressa, priraum rimu- 

 liformia, mox regularia v. geminatim ternatimque confluentia, sim- 



plicia cire, r^ mm. lata, evoluta coerulescenti - v. intense caesio-nigra, 



demum margine tenui interiore atro zeorina facta , novella farinoso- 

 velata, margo thallinus non v. vix perspicue emergens ; epithecium 

 fuscescens v. pallide nigricans, lamina et hypothecium hyalina ; sporte 

 subglobosae v. late ellipsoidese, in ascis octonœ;, 8 - 13 p>. longge, 7-8 

 pi latae. — Similis L. subcalcareœ, sed thallus margine eleganter 

 subeffigurato- lobatus et sporarum juniorum et simul evolutarum 

 forma oninino alia. Thallus quoad formam simulât illum Urceolariœ 

 subcoeruleaî Del. Flore d'Egypte, t. 59., f. 1. Ab Aspicilia calcarea 

 V. microspora Arn. Flecht. Krain , p. 20 dilïert apotheciis et sporis 

 minoribus et a L. subcinerea Nyl, in Flora 1869, p. 82 colore et 

 forma thalli et colore apotheciorum dislat. — Crescit calcicola et 

 silicicola in desertis VVadi Cherese, Wadi Na-umieh superiore et in 

 summo Gebel Cheschen in Wadi Gendel inter Cairo et Sues : 

 Schweinf. 



34. L. (sect. Aspicilia) siibcalcarea Mûll. Arg , thal- 

 lus crassiusculus, albus, diffraclo-areolatus, aerolae subconvexae , 

 margo non effiguratus ; apothecia 1/3-2/3 mm. lata, orbicularia, 

 plana, minuta, a margine thallino tamen haud superata, demum 

 subinde margine thallode ci'enato cincta , ab origine subcoerulescenti- 

 nigra, epruinosa, madefacla demum obscure livida ; epithecium olivaceo- 



