PATELLABIA. 105 



On decorticated wood, old sacking, &c., and according to 

 Rehm, on stems of Lappa and Centaurea. 



Specimen examined from Kehm's Ascom., n. 574, and 

 Phillips' Elv. Brit., n. 90. The specimen in the Kew copy 

 of Fries' Scler. Suec., n. 336, labelled " Patellaria atrata /3, 

 Fr.," is Biatorella resinae, Mndd. 



** Spores more than 3-septate when mature. 



Patellaria atro-alba. Cooke, Hdbk., n. 2168; Phil., 

 Brit. Disc., p. 369. 



Gregarious or scattered, about f mm. across, concave then 

 plane and applanate, orbicular, externally and the margin black, 

 disc white ; asci clavate, apex narrowed, 8-spored ; spores irre- 

 gularly 2-seriate, hyaline, 5-7-septate, narrowly elliptic-fusi- 

 form, straight, 27-33 x 5 //. ; paraphyses slender, hyaline. 



Lecanidion atro-album, Sacc., Syll., viii. n. 3275. 



On decorticated branches. 



Type specimen examined. 



A very distinct and remarkable species, possessing all the 

 morphological features of a typical Patellaria, but unique 

 in the white disc. 



Patellaria subtecta. Cke., in Phil., Brit. Disc., 

 p. 365. 



Scattered or gregarious, at first almost conical, then 

 clavate, finally expanding and becoming discoid, about 

 ^ mm. across, black; substance soft, collapsing when dry; 

 excipulum parenchymatous, cells irregularly polygonal, 5-8 ft 

 diameter, olive; paraphyses broadly clavate, often curved 

 more or less, apex rounded, 8-spored; spores irregularly 

 2-seriate, elliptical or narrowly elliptic-oblong, hyaline, 

 smooth, 2-4-guttulate, ultimately 3-septate, 20-25 X 5-6 /t ; 

 paraphyses numerous, slender, branched above and agglu- 

 tinated together with olive mucilage ; excipulum thin, 

 colourless. 



Lecanidion subtectum, Sacc., Syll., viii. n. 3268. 



On inner bark of Cistus laurifolius. 



Type specimens examined. 



Cooke says, " Stylospores in the same hymenium, elongated, 

 cylindrical, 5-8-guttulate, curved, on short sporophores 

 seated amongst the asci, 30-50 x 5 ft." 



