LICHENS. 165 



latse. — Extus perfecte Lecideam parasema simulât, sed tliscus macle- 

 factus livido-pallidus (margo niger remanet) et sporarum longiorum 

 ambitus omnino alius. 



Corticola in v&mhFagi betuloiclis in baie Orange (Hariot, n° 52 pr. p., 

 et D r Hyades, n° 1535 pr. p.), nec non ad corticem Drimydis Winteri 

 in insula Wollaston (Hariot, n os 36 et 38 pr. p.). 



p. expallens Mûll. Arg. 



Apothecia jam statu sicco in disco undique vel pro parte livido-pallida v. 

 albescentia, margine lamen nigro cincta. 



In cortice Fagibetuloidis, île L'Hermite (Hariot, n° 34) et ad corticem 

 Fagi antarcticœ, baie Orange (Hariot; specim. sporis destituta). 



72. Lecidea (Sect. Eulecidea) ijipolita Mùller Arg. 



Tballus plumbeo-cinereus, mediocris, subdiffracto- v. rimoso-areo- 

 latus, areolse convexulse, ssepe gibboso-inœquales; apothecia ^ mm lata, 

 nigra, sessilia; discus planus et nudus, madefactus concolor et non- 

 nihil cum margine ruguloso-insequalis; margo tenuis, semper promi- 

 nens et obsolète rugulosus v. subplicatilis; epithecium virenti-atrum 

 aut obscure virens; hypothecium superne hyalin um, inferne crasse 

 fusco-nigrum v. rufesceoti-fuscum ; lamina hyalina ; sporse in ascis 8-nse, 

 late ellipsoideae, i i^-iSHongse, cire. S^latœ. — Juxta L. conflueniemNyl. 

 locanda, cujus apothecia multo majora et minus prominenter mar- 

 sinata. 



Ad saxa, Terre de Feu (Hariot). 



73. Lecidea (Sect. Eulecidea) azurella Millier Arg. 



Thallus albus, tenuissimus, leprosulus, margine ssepe linea nigra 

 cinctus; apothecia ^~ mm lata, adpresso-sessilia, tenuia, plana, niger- 

 rima et nuda, discus semper planus, margine tenui integro concolore 

 cinctus; epithecium viridi-nigrum; hypothecium atro-fuscum, cras- 

 sum; lamina amœne azurea; sporse in ascis superne latiusculis 8-nse, 



Mission du cap Horn, V. 22 



