272 Prof. Dr. C. Meresclikovsky's Diagnoses 



Var. halophiluSj Mer. 



Thallus major et crassior quam in var. caspico, Mer., circitcr 3-5 

 centim. altus vel plus, pallidus, livido-lutescens vel livido- 

 albesceiis, cartilagineus, subtus concolor, nervoso-reticulatus, 

 arbusculos ramosos formaus, laciniis subdicbotomice divisis et 

 subdivisis, compressis, planis vel Icviter canaliculatis, circiter 

 2-3 millim. latis, sublinearibus vel apicem versus pauUum dila- 

 tatis, plus minusve furfuraceo-rugosis praesertim apicem versus. 

 Semper sterilis. 



Spec. orig. in herb, meo Kazani. 



Gubernia Astrachan. Asia Media (Djungaria). 



Xanthori I parieiina^ var. adpressa, Mer. 



Merescbkovsky, Schedulfe ad Lich. Ross, exsiccates, Kazau, 1913 ; vide 

 etiam Hedwigia, 1919, p. 209. 



Tballus rosulas usque ad 1 decim. formans, tenuior ut in typo, arete 

 ad substratum adpressus, lobis vulgo paullulum angustioribus. 

 Ad corticem arbor um. 



Spec. orig. (1) ill herb, meo Kazani, (2) in Mereschkovsky, 

 Licli. Uoss. exs. no. 40. 



Rossia Media. Esthlandia. Tauria. Gallia. Austria. 

 Helvetia. 



Var. aureola, forma isi'iiotgla, Mer. 



Thallus aureo-aurantiacus, centre minute papillato-isidiojjus ; apo- 

 thecia magna, margine isidiis brevibus oruato. Ad trabes. 



Spec. orig. in herb. Conservat, botan. Genevse (a Leveilld 

 in Tauria lectuni). 



Tauria. 



It is possibly the same as the var. isidioidea (Belts.), Zahlbr, 



Inch, however, cannot be ascertained v 

 with tiie original specimen of the latter. 



The following is a list of all known European forms of 

 Xanthvria pariedna : — 



1. Xanthoria parietina (L.), Th. Fr., type. 



2. , forma aurata (Mass.), Lich. ital. exs. no. 3.3. 



3. , forma chlorina (Chev.), Oliv. Meresclik. Licb. tic 



exs. no. 83, 

 4. , forma cinerascens (Leiglit.), Saudst. Crombie IJiit, 



Lich, i. p. 298. 



6. , forma dhpersa, Oliv. Bull. Soc. bot. d. Fr. 1894, p. 94. 



G. , forma iinbricata (Mass.), Zahbr. Crypt, exs.no. 1979. 



