194 NATURAL HISTORY OF LLANDUDNO PARISH. 



Lecidea vesicularis, Mr. Winch, 



liecanoTSL gelida. Mr. Winch. 



Lichen geographicus. This minute vegetable 

 presents, on the rocks of N. Wales, many re- 

 semblances of the outlines of a map. In the 

 ascent to Snowdon, from Llanberis, we found 

 an almost exact outline of Europe, with the 

 African coast, traced by this Uchen, on a flat 

 mass of grey wacke. 



A singular sponge-like substance, is found 

 growing from decayed wooden spars in the cop- 

 per mine. It nearly resembles AXeciondi jubata, 

 but I had no opportunity of examining its fruc- 

 tification. Similar substances occur in the Cum- 

 berland mines. 



The sea- weeds of Orme*s-Head are not nume- 

 rous nor plentiful. The tide occasionally throws 

 up, on the shore of the Conway, Fucus coccineay 

 and F. rubra, with several of the Ulvas. These, 

 however, are common on the Lancashire coast. 

 Fucus Jiagelliformis is very abundant in Llan- 

 dudno bay. 



