— 16 — 



(Barb.), in Djebel Mokattan prope Cahiram (Barb.), in Gebel Gha- 

 rebiin deserti Aegypt. med. (Sehwf.), ad Koubla de Bir El Magara 

 (Barb.), prope Alexandriam (Aschers.). — Forma haec in Aegypto 

 med. et int'eriore vulgatissima est. 



10. PlacocUiim crassnm v. deserti ; Squamaria lentigera f. deserti 

 Nyl. Lich. Ehrenb. p. 63; e squamis crassiusculis Placodïo crasso 

 potins quam PL lentigero adscribendum est. — In Cyrenaica ad Ben- 

 ghasi recenter a Cl. G. Ruhmer lectum est (specim. dédit D"" As- 

 cherson). 



11. Diploicia cayiescens M&ss. Rie. p. 86 ; ad Marabout Kaiyeh, 

 sterilis (Barb.). 



* 12. Thalloidima Barbeijanum MùU. Arg. Thalli squamae 1|4 — 

 1{4 mm. latae aut minores, orbiculares, ambitu crenato-lobulatae v. 

 snbcrenatae, convexiusculae, laeves, demum rimoso-fissae, saepe fere 

 crustaceo-aggregato-confluentes, monocarpicae ; gonidia giobosa, 

 diametro 12-18 p. lata ; apothecia IfS-l^S mm. lata, modice emer- 

 gentia, nigra aut nigro-fusca, novella nonnihil extus thallodice ves- 

 tita, mox undique nigra sed tola caesio-pruinosa, margine tennissi- 

 rao vix émergente magis nigrato praedita, ambitu regulariter orbi- 

 cularia, intus infra epithecium alba ; disons planus, demum conve- 

 xiusculus ; lamina praeter epithecium olivaceo fuscum undique cum 

 hypothecio hyalina, parnphvses facile separabiles, apice fusco-cla- 

 vatse et nonnihil torulosse ; asci subangusti, 8-spori ; sporse 12-15 p. 

 longae, 4-5 p. latse, eilipsoideo-dactjloideae. — A proximo Th. geo- 

 leuco Mùll. Arg. Lich. Aegjpt. n. 19, s. Lecidea geoleuca'Nyl. Lich. 

 Ehrenb. p. 65 prœsertim apotheciis parvulis, pruinosis, intus albis, 

 et colore hypothecii differt. — Calcicolum in deserto parvo (petit 

 désert) Aegypti inferioris (Barb.). 



13. Lecanora subsimilis {Caloplaca subsimilis Th. Pries Scand. 

 p. 189 V. décolorons; hic etiam pertinet Lecanora epixantha Nyl. 

 Lich. Ehrenb. p. 62, et MûU. Arg. Ennum. Lich. Aegypt. p. 12 ; 

 Thallus bene evolutus, areolato-granulosus, mox e vitellino argil- 

 laceo-pallidus (demum nigrescens). — Prope Pyramidem Chephren, 

 ad Abusir et in deserto Galala, et dein etiam in Aegypto submedi- 

 terranea (Barb.). — Species hodie a cl, Nyland. Lecanora epixan- 

 tha nominatur, sed Acharii Lecidea epixantiia (Lichenogr. Univ. p. 

 208) gaudet margine integro (ex Ach. 1. c.) et hanc ob causam ve- 

 risiniiliter ad L. vitcllinam pertinet, at specimina in hb. Achar. et 

 Swartz. (fide Th. Fr. Scand. p. 189) nunc desunt. — Subiimilis 

 (1860, dein pro specie prioritate gaudet. 



14. Lecanora Cheresina Mûll. Arg. Enum. Lich. Aeg, p. 14 ; etiam 

 in Gebel Gherebun deserti Aegypt. médise (Schwf.). 



* 15. Lecania enjsibe Mûll. Arg. 1. c. p. 15, calcicola in Gebel 

 Gharebun (Schwf.), et in deserticis Aegypti sabmediterraneai 

 (Barb.). 



— — V. incusa (Kœrb.) Mûll. Arg. 1. c. n. 37, 

 calcicola in Gebel Gharebun versus mare rubrum (Schwf.). 



— — V. pinguiuscula Mûll. Arg. 1. c, in deserti- 

 cis Aegypti infer. (Barb.), prope Alexandriam (Aschers.). 



* 16. L. albariella (Nyl.) Mûll. Arg. 1. c. n. .38; calcicola prope 

 Alexandriam (Aschers.). 



— — V. subcaesia (Nyl.) Mûll. Arg. 1. c. ; in Aegypto 



submedit. hinc inde (Barb.), prope Alexandriam (Aschers.). 



