VERRUCARIEiE. 68 



Thallus tolerably thick, crustaceous, of a tawny-black, 

 cracked, with an uneven, loose, crumbly surface, raised 

 into low, warty, elevations around the apothecia. Apo- 

 thecia large, nearly double the size of those of V. umhrina, 

 more or less numerous and crowded, hemispherical, their 

 apices generally visible (though sometimes covered by the 

 thallus), their basal circumferences surrounded by the 

 scaly elevations of the thallus. Perithecium dimidiate, 

 spreading at the base, the interstices between the peri- 

 thecium and the tunic filled up with a dark substance ; 

 nucleus white, when moist, inclosed in a dark brown 

 inner tunic, which separates it from the rock. 



42. V. EL^iNA, Borr. Sporidia in asci 8, linear-oblong, 

 uniseptate, pale, hyaline. Plate XXVII. fig. 2. 



Lichen viridulus, Sni. E. Bot. 2455. {excl. s^?i.) (1812.) 

 Verrucaria el^ina, Borr. under E. Bot. Suppl. 2623, fig. 2. (1830.) 



Sent from Ireland by Miss Hutchins ! Mr, Borrer, 



The perithecium is singularly flattened and spread out 

 at the circumference, and is bent in very acutely at the 

 base, nearly enveloping the nucleus, except a small round 

 space in the very centre of the base. 



The specimens of V. Gagei, Borr. ! (see Plate XXVII. 

 fig. 8) and V, Harrimanni, Ach. ! (see Plate XIX. 

 fig. 4) in herb, Borrer, showed only on section a black 

 flat perithecium, with a roundish yellow spot underneath, 

 no trace of asci or sporidia being discernible. 



V. lithina, of Fl. Hib. 92, (which is not identical with 

 V. lithina, Ach. according to a specimen from Swartz in 

 herb, Borrer,) and V. inollis, Fl. Hib. 97, are referable to 

 the genus Pyrenothea. 



V, circumscripta, Fl. Hib. 96, belongs to the genus 

 Sagedia; and V, fissa, Fl. Hib. 95, to Endocarpon, 

 V, rubiginosa, Fl. Hib., I have never seen specimens of. 



