VERRUCARIE.^. 35 



nucleus, properly speaking. The ascigerous disk (a) 

 rests indeed upon a thin tunic (/j), somewhat similar to 

 that of Pertusaria, but it docs not surround it, merely 

 subtending the base. Neither is there any pore ; on the 

 top of the asci and paraphyses is a roundish, dark brown 

 layer (c), occupying the centre, around that a paler 

 portion {d), as if the layer was there thinner through 

 disruption, then a darker ring (e), and beyond that again 

 a paler disrupted ring (/), outside of which is the thick 

 margin of the thallodal wart (y). (See Plate XV. 

 fig. 2.) The asci were in a young state, and with diffi- 

 culty seen ; they contained 8 sporidia, also in a young 

 gelatinous condition. 



I incline to think that there is some foundation for 

 hazarding a conjecture that this genus is improperly 

 placed among the Angiocarpi. 



Genus II. Verrucaria, Fers. 



Perithecium solitary, corneo-carbonaceous (black), osti- 

 olum simple, papillceform, or perforated; nucleus gela- 

 tinous, fluid or deliquescing, sub-hyaline; thallus crus- 

 taceous. 



^CoRTICOLtE. 



\Peritheciu7)i entire, completely enveloping the nucleus, 



1. V. NiTiDA, Schrad. Sporidia in asci 8, elliptical or 

 oblong, slightly tapering towards each extremity, 

 triseptate, brown. Plate XV. fig. 3. 



Sph^ria NITIDA, Weig. Sow. E. Fungi, t. 275. (1800.) 

 Verrucaria nitida., Schrad. Journ. 1801. fasc. i. p. 79. 



Ach. L. Univ. 279. 



Borr. E. Bot. Suppl. 26Q7. fig. 1. 



Fries. L. Ref. 443. 



Hook. Br. ri. ii. 149. 



Tai/l. Fl. Hib. p. ii. 87. 

 Ptrenula nitida, Ach. Syn. 125. (1814.) 



