686 



CLXI. LICHENES. 



a m\ V*i#tfJK&0 j^ £ *? 



s — — V " -J Atytejnder 



^c. ^/^ k~'i hi ' ~V 



■ 5 )P T^». thill* \/ 



c.r.vjhii'Q. 



691. COLLEMA BYRSINUM, /2f/z. 



692. Myriangium Duri^ei, Mont. 



<a) Plants, (b) sect, of plant, (c) thin sect, thallus in fruit, (d) theca, (e) spores, 

 (a) and (b) nat. size ; (c) — (e) enl. 



693. Calicium hyherellum, var. validius, C. Knight. 



(a) Plants, (b) apothecium, (c) spore, (a) nat. size; (b) and (c) enl. 



694. Sph.erophoron compressum, Ach. 



695. Cladonia retipora, Flcerke. 



696. C. Flcerkeana, Fries. 



697. C. gracilis, Hoffm. 



698. Heterodea Muelleri, Nyl. 



