VERRUCARIEiE. 37 



with a paler or cream-coloured thallus, was V. cinerea, 

 Fers, ; the darker yellow one alone being dermatodes. 



2. V. RHYPONTA, Ach. Sporidia in asci 8, very minute, 



linear-oblong, uniseptate, pale yellow. Plate XVI. 

 fig. 1. 



Verrucaeia RHYPONTA, Ach. L. Univ. 282. (1810) ; Syn. 89. 



Borr. E. Bot. Suppl. 2597. fig. 2. 

 _ _ Fries. L. Ref. 448. 



Sussex ! Mr. Borrer. 



Distinct from V. oUvacea, Pers., and the intermediate 

 plant found on beech bark, in the New Forest, by Mr. 

 Lyell (which it is proposed to call F. Lyellii), both of 

 which range in the section with dimidiate perithecia. 



3. V. BiroRMis, Borr, Sporidia 8 in asci, oblong, more 



or less pointed at each extremity, sometimes one end 

 rounded, and the other pointed, uniseptate, the cells 

 unequal in size, containing one, two, or sometimes 

 three round ultimate spores in each cell. Plate 

 XVI. fig. 2. 



Verrucaria biformis, Borr. in E. Bot. Suppl. 2617. fig. 1. (1829.) 



Tries. L. Ref. 446. 



Ilooh. Br. El. ii. 150. 



Tayl. El. Hib. pt. ii, 89. 



Sussex ! Mr. Borrer. Shelton Rough ! Weir Coppice ! 

 Haughmond Hill ! all near Shrewsbury. Loppington, 

 Shropshire ! 



Asci linear, very narrow and slender, rounded at the 

 apex. Sporidia in single series. Perithecium globose, 

 entire, subtending the base of the nucleus, not more than 

 one fourth or one third the size of those oi gemmata, with 

 which it not unfrequently grows on the same tree ; they 

 are also more numerous and crowded than in gemmata. 

 The very white thallus is limited by a black line. " Not 



