268 Prof. Dr. C. Mcresclikovsky's Diagnoses 



Var. incis't, Mer. 



Merescliliovsky, I. c. (cum fig.). 



Apotheciis minoribus, immersis, crateriformibus, margine thallino 

 acuto, inciso, saepe fere totum discum obteclo. i'orsan potius 

 species peculiaris sit. Saxicola. 



Spec. orig. (1) in lierb. meo Kazani, (2) in Meresclikov.sky, 

 Tabulae Gen. Lich. Kazan, 1913, Aspiciliaj i. (Sphierothallia) 

 no. 4. 



Gubernia Astraclian. Asia Media. 



Var. nigrescens, Mer. 



Mereschkovsky, I. c. (cum fig.). 



Thallus crustaceus, effusus, crassus, e tuberculis mastoirleis, 

 2-3 millim. (vel plus) longis, circiter 1-2 millim. latis, confertis, 

 contextus ; nigrescens vel olivaceo-uigrescens, cyphellis albidis 

 orndtus. Sterilis. In rupibus arenaceis. 



Spec. orig. in herb, meo Kazani. 

 Gubernia Astrachan. 



Var. semivaganSj Mer. 



Meresclikovsky, /. c. (cum fig.). 



Thallus pro parte crustaceus, pro parte glebulos minutos formans 

 statu libero viventes. Areolae thaUi sat similis species sed super- 

 ficie paullo nitidiusculo et cyphellis magis immersis. 



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

 Tabulse Gen. Lich., Aspicilia, i. no. 5. 



Aspicilia diibia, Mer., var. micropht/Uina, Mer. 

 Mereschkovsky, Addit. ad Lichenogr. Ross, i., in Oesterr. Bot. Zeitschr. 

 1921. 



Tuberculis thalli minutis. 



Spec. orig. in Mereschkov.sky, Tabulae Gen. Lich. Kazan, 

 1913, Aspicilia, i. [SplicerotJudlia) no. 16 (e Tian-Schan). 



The type of the species is represented in my ' Tabulae 

 Generum Liclienoruni ' by no. 15. Tiie var. microphyllina 

 (no. 16) has the tubtrculse one-half or one-tliird the size of 

 those in tlie type. 



Aspicilia esculenta, forma retusa, Mer. 



Thallo minore, vulgo 10 millim. (8-15 millim.) late, sordide griseo- 

 albescente, squamulis minoribus, minus prominuUs, retusis, 



