20 ANGIOCARPOUS LICHENS. 



Bodlyn plant there was only one well-marked septum, 

 with numerous other horizontal divisions or reticulations 

 (see Plate VI. fig. 2). There is little doubt, however, 

 that all are identical. 



16. E. FissuM. Sporidia in asci, number unascertained, 



(probably 2,) lineari- oblong, rounded at each ex- 

 tremity, dark bright-brown, the internal spores ar- 

 ranged in regular horizontal rows, so as to give the 

 appearance of many septa. Plate VI . fig. 3. 



Vebrucaria pissa, Tayl. Fl. Hib. pt. ii. 95. (1836.) 

 Carig, County Kerry ! Dr. Taylor, in herb, Borrer. 



17. E. isiDioiDES. Sporidia in asci 8, very large, narrow- 



oblong, tapering towards each obtuse extremity, en- 

 tire, without septum, bright brown. Plate VI. fig. 4. 



Verrucaria ISIDIOIDES, Borr. E. Bot. Suppl. 2622, fig. 1. (1830.) 

 Pertusaria ISIDIOIDES, Hook. Br. Fl. ii. 160. (1833.) 

 PoRiNA ISIDIOIDES, Tai/l. Fl. Hib. part ii. 102. (1836.) 



Glengariff", near Bantry ! Mr. Borrer. 



The very large sporidia, although differing in number, 

 lead me to conclude that the affinity of this plant is with 

 the preceding three species, together with which, from 

 the natm-e and number of the sporidia, it ought perhaps 

 to be arranged correctly in a distinct and separate genus, 

 could sufficient external characters be found to render 

 such a division desirable.* The sporidia are of a bright 

 brown colour, marked very regularly in horizontal series, 

 with wrinkles or network appearance from the enclosed 



* Though foreign from the present work, I may, as well record here that 

 an examination of authentic specimens ! of Verrucaria gelida, Tayl. (Crypt. 

 Antarctica, Plate cxcviii. fig. 4) in the herbarium oi the Rev. Churchill 

 Babington, St. John's College, Cambridge, has shown me that that plant is 

 really an Endocarpon belonging to the present section of the genus. Each 

 ascus contained only one large sporidium, Hneari-oblongj rounded at each 

 extremity, bright brown, triseptate, impressed with intervening reticulations 

 or wrinkles from the granular contents. In the above work the sporidium 

 is represented as still enclosed in the ascus, hence the peculiar shape and the 

 hyaline margin. 



