Vcrrucaria.] LICHENES. 153 



Bot. Suppl. after t. 2623. /. 2. — Lichen riridulus, E. Bot. 

 t. 2455, (excluding the synonyms). 



On fissile slate rocks, in shady situations in the west of Ireland, Miss 

 Hutchins. — The black ■ apothecia burst through an irregular star-like 

 crack in the crust and rise above the surface. 



17. V. Icevdfa, Ach. (greyish Water Verrucaria); crust thin 

 tartareous cracked smooth dirty- white or brow r nish-grey, apo- 

 thecia small partially emerging - somewhat conical black. Ach. 

 Syn.p. 94. Borr. in E. Bot. Svppl. t. 2623./ 2. 



Rocky beds of streams in mountainous districts, in the north of Eng- 

 land, Mr. Teesdale, Rev. J. Harriman. Killarney, Sir T. Gage. 



18. V. Harrimdni, Ach. (Mr, Harriman s Bock Verrucaria); 

 crust tartareous continuous limited mouse-coloured with very 

 minute depressed dots, apothecia minute immersed globose with 

 a prominent bordered orifice dirty white within. Sm, — Ach. 

 Syn. p. 93. — Lichen Harrimani, E. Bot. t. 2539. 



On hard grey calcareous rocks, in Durham, Rev. J. Harriman. — " Its 

 patches, though inseparable from the stone, are very distinctly limited 

 and visibly prominent above its surface, of a hard tartareous texture, 

 white within, greyish or pale mouse-coloured on the outside, which is 

 thickly besprinkled with innumerable depressions or dots. The tuber- 

 cles are deep sunk in the crust, blackish, their little bordered orifices only 

 projecting slightly above its level." Sm. 



19. V.plumbea* Ach. (lead-coloured Roch Verrucaria); crust 

 tartareous minutely cracked and rugged lead-coloured limited, 

 apothecia half-immersed globose black pale within. Sm* — 

 Ach. Syn. p. 94. Schcer. Lich. Helv. p, 54. n. 102. — Lichen 

 plitmbosus, E. Bot. t. 2540. 



Limestone rocks, near Cheddar, Somersetshire, Mr. Borrer. " This 

 species differs sufficiently from V. Harrimani ,■ not so much in the bluer 

 colour, as in the tessellated configuration of its crtal, which moreover is 

 destitute of minute dots. 



20. V. Gdgei* Borr. (Gagean Rock Verrucaria); crust 

 continued calcareous smooth brownish-white irregularly cracked 

 when dry. apothecia very minute blackish sunk in the crust. 

 Sm. — Lichen Gagei* E. Bot. t. 2580. 



Rocks of Glena and Glen Flesk, near Killarney; but not common. — 

 Sir Jas. B. Smith referred this to the Aeliarian Genus Urceolaria: but 

 Mr. Borrer ranks it with Verrucaria* 



21. V. viridula. Ach. (Mosaic "Rock Verrucaria); crust of 

 polygonal granulato-crenate scales thickish tartareous rugose 

 greenish olive-brown, apothecia largish black partially immersed 

 conical. Borr* — Ach. lack, Univ. .Ltd. />. (>7.~>. aorr, in E. 

 Sot. SuppL after t. l'<>- ; 5. f. 2. — Endocarpon viriduium t Schrad. 

 Spied. i>. 192. /. 2./ i.—Pyrenula teeeeUata* Ach* Syn.p. 126. 

 — Lich, a teeeeOatus. /■/. Bot* t. .">:::■>, (bad as tojiaurt andde- 

 st ription* ) 



< )n bricks and tile-. — A common and \ cr\ \ ari;ili!c Bpe< lies, P Inch has 



been involved in much obscurity ; parti} on account ofthe indifferent 



