ENDOCARPEiE. ^ 19 



14. E. PALLIDUM, Ach. Sporidia in asci 2, very large, 



lineari-oblong, rounded at each extremity, uniseptate, 

 pale yellow. Plate V. ^^ 3. 



Endocarpon pallidum, Ach. L. Uiiiv. 301? (1810;) Syn. 100. 



Hook. Br. Fl. ii. 157. 



Tayl. Fl. Hib. pt. ii. 99. 

 Lichen pallidus, Sm. E. Bot. 2541. (1813.) 

 Endocarpon pusillum a. pallidum, Fries, L. Ref. 411. (1831.) 



Ireland ! from Sir Thomas GagCy in herb. Borrer. 



The structure of the apothecium is, in this species, 

 generally similar to the last. The sporidia are more 

 uniform in size, though similarly impressed by the 

 irregular granular contents. 



15. E. LiTHiNUM. Sporidia in asci 2, very large, lineari- 



oblong, rounded at each extremity, uniseptate (or 

 triseptate ?), dull green. Plate Vl. fig. 2. 



Verrucaeia lithina, Ach. Meth. Suppl. 18. (1803;) L. Univ. 287; 



(according to authentic specimen, from 

 Swartz ! in herb. Borrer.) See Plate VI. 

 fig.l. 



Pyrenula lithina, Ach., Syn. 127. (1814.) 



Llyn Bodlyn, Merionethshire ! Bev. T. Salwey. 

 Teesdale ? ! Bev. Mr, Harrimann, in herb. Borrer. 



Thallus tartareous or subcrustaceous, variable in colour, 

 either a dirty tawny white, or of a dull reddish hue, or 

 black, always recognisable by being white underneath 

 the surface when abraded, whatever the colour, smooth, 

 cracked, the areolas somewhat rugged and convex. Jpo- 

 thecia moderately large, very prominent, hemispherical, 

 slightly conoid, covered by the thallus which margins the 

 rather large pore. Perithecitim dimidiate, rufous- brown ; 

 nucleus pale yellow ; asci small, containing only 2 sporidia, 

 pale brownish-green, one larger than the other. The 

 sporidia were, in Swartz's specimen and the Teesdale 

 one, triseptate, with smaller and finer intervening reticu- 

 lations or veins (see Plate VI. fig. 1), whilst in the Llyn 



