(0) J. MÜLLER. LEGANOREiE ET LBCIDEEjE. # » - i T 



l ( .). Pertusaria (§ Leioplacae ) leucoxantha Müll. Arg.; 

 lhallus albido-flavicans, mediocris, continuus, demum leviter rimulosus, 

 superficie laevis; verrucœ i mm. lalœ v. leviter minores, hemisphaericae, 

 basi limitai», apice non depressae, Ueves aut obsolete gibberosas, cum 

 thallo concolores; ostiola 1-4, nigra, approximata, haud prominula oec 

 impressa; sporae umserialim 8-nœ, cire 60 [j. longa; et 127 jj. lata-, intus 

 laeves. — Inier P. socotrinam et P. xanthoplacam Müll. Arg. inserenda et 

 posteriori affinior est, at prima fronte colore omnium partium alio, fere 

 albido, at statu madefacto bene llavente, et tballo juniore conlinuo, nec 

 areolalo-rimoso distincla est. — Saxicola, in Tbursday Island Queenslan- 

 dia3 septentrionalis : Kuight, n. 280. 



20. Pertusaria (£ Leioplacae) schizostomella Müll. Arg.; 

 lhallus cinereo-albidus v. nonnibil flavescenti-cinereus, tenuissimus, 

 obsolete rugulosus; Verruca» Y-» ('A-l) mm. lata 1 , discret«, orbiculares, 

 nano-hemisphœricœ, subindistincte rugulosœ et Ueves, apice late rotuu- 

 dato haud truncalœ, 2-6-carpicœ, apice vulgo imi-osliolalae ; ostiola fusca 

 in unum exiguum stellari 3-4-lobulatum aut in rimulam exiguam trans- 

 versalem abeuntia; sporœ in ascis 2-nœ, cire. 105 \y. longœ et 37 u. latte, 

 intus tenuiter plicato-costulaUe. — Juxta P. Woollüanani Müll. Arg. 

 locanda est, cujus Verrucae aliter osliolatse et sporœ alia3. Ostiola con- 

 fluentia ut in § Pustulatarum, sed ostiolum commune non maculiformi- 

 dilatatum et verrucœ demum subtiliter astroidea apparentes. Yerrucœ 

 minores quam in P. tetrathalamia Nyl. — Corticola, New Soulh-Wales : 

 Knight, n. 31. 



21. Pertusaria (§ Leioplacae) leucothelia Müll. Arg.; lhallus 

 cum verrucis albus, punctalo-vesligialis aut evanescens; verrucœ 1 mm. 

 lala; et paullo minores, globoso-hemisphœrieœ, basi constrictœ, subregu- 

 lares, sparsim ostioligerae ; ostiola pallide fusca, haud impressa, nec 

 emersa; sporœ in ascis 4-nœ, cire. 75 u. long» et 33 jx lalœ, intus valide 

 plicato-coslulala 1 . — A subsiinilibus P. albissimn et P. Candida Müll. Ail;. 

 jam verrucis minoribus, basi constriclis, superficialibus et sporis intus 

 valide eoslulalis recedil. Proxima P. peliostoma (Ach.) Müll. Arg. dein 

 offert ostiola alia. — Corticola in prov. Victoria : Knight, n. 174. 



22. Pertusaria (§ Leioplacae) microspora Müll Arg.; lhallus 

 cum verrucis albidus v. levissime slramineo-albus. tenuissimus, laevis, 

 opacus, demum hinc inde subareolatim evanescens; verrucœ cire. 1 mm. 

 lata 1 v. paullo minores, discret», hemisphœricœ, reguläres, lœvigatœ, 

 subpolilœ, 2-o-carpicœ, apice non depressœ, uni-pauciostiolatœ ; ostiola 

 exigua, fusco-pallida, haud emergentia, demum paullo impressa ; sporœ 



