VERRUCARIE.E. 59 



Not to be confounded with Lecidea alhO'Ccerulesce'iia 

 /3. immersa (Fries, L. Ref. 296), Lichen immersus, E. Bot. 

 1. 193, which grows on the same description of rocks, not 

 unfrequently together, and which it resembles in general 

 external appearance. Lichen imrnersuSy however, is a 

 true Lecidea. (See Plate XXIV. fig. 5.) 



36. V. Maura, Jch. Sporidia in asci 8, oblong, mar- 

 gined, pale. Plate XXV. fig. 3. 



Veerucaria MAURA, ^(7A. Mctli. Suppl. 19. (1803); L. Univ. 291; 

 Syn. 95. 



Fries, L. Ref. 442. 



ZToo/J:. Br. n. ii. 154. 



Ta^l. n. Hib. pt. ii. 93. 

 Lichen maurus, Sm. E. Bot. 2456. (good) (1812.) 



Dunbar ! Mr. Borrer, Barmouth ! Bev. T. Salwey. 



Thallus thick, very compact, of a very dark reddish- 

 black, coarsely cracked, smooth, somewhat polished and 

 shining, the plane of the areolae covered with very minute 

 papillae, or elevated points, scarcely visible to the naked 

 eye, their margin somewhat raised into a very narrow, 

 sharp, elevated rim. Young entire plants, having the 

 margins of the thallus visible, have very much the ap- 

 pearance of a thick olive-black oily substance dropped or 

 poured out upon the rock, and are frequently uniform, 

 or without cracks. Apothecia scattered, not very nume- 

 rous, tolerably large, hemispherical, entirely immersed in 

 and covered by the thallus, their situation only recog- 

 nisable by their elevating the thallus, and their distinct 

 large pore. Peritheciiim spreading widely at the base, 

 dimidiate; nucleus white, enveloped in a black tunic 

 which separates it from the rock. Sometimes a dark 

 substratum, or portion of the thallus, intervenes between 

 the nucleus and the rock, causing the perithecium at first 

 sight to appear entire. 



