2 



Proceedings of the Royal Irish Academy. 



The immediate neighbourhood of the lake is undulating ground, 

 with marshy meadows in the hollows. Woods are common, and 

 gentlemen's residences occur at intervals along the shore. 



Shean JS'orth rises to the height of 1135 feet within one mile 

 of the shore, between Derrygonnelly and Belleek on the lower lake, 

 and from the upper lake, Knockninny, 628 feet in height, is about 

 the same distance. With these exceptions, the land near the water's 

 edge nowhere rises to any considerable height. K"one of the localities 

 for species extend further from the lake than the cliffs of Shean 

 North, at Pollaphuca, which are about half a mile distant. 



The district is entirely limestone, except a portion of the east 

 side, between Enniskillen and Kesh, where the new red sandstone 

 borders the lake for about nine miles. Boa Island also belongs to 

 the sandstone formation. Everywhere the rocks are deeply covered 

 with boulder clay, and they are rarely, if at all, exposed along the 

 shore. 



As my examination of the flora did not extend more than half 

 a mile inland, the species observed were mainly lowland forms. At 

 Pollaphuca a few mountain species were gathered, eleven of which 

 (marked with an asterisk) go to swell the species, which deviate 

 from Watson's British and English types. These number only 

 twenty-six, and are arranged after Watson's compendium of the 

 "Cybele Britannica," 1870, thus :— 



Scottish. 



*Gymnadenia albida. 

 Potamogeton filiformis. 



ScOTTISH-HlGHXAND . 



*Saxifraga hypnoides. 

 "^■'Crepis paludosa. 

 E-ubus saxatilis. 



Scottish-British. 



Thalictrum majus (Sm.). 

 Vicia sylvatica. 

 Pinguicula vulgaris. 

 Pamassia palustris. 



Bbitish-Scottish. 



Comarum palustre. 

 *Geum rival e. 



Sparganium minimum. 

 *IIabenaria viridis. 

 *Scirpus csespitosus. 

 ■^Eriophorum vaginatum. 



Highland. 



Galium boreale. 

 *Hieracium iricum. 



British- Highland. 



Chrysosplenium oppooitif olium. 

 Yaccinum myrtillus. 

 *Lycopodium selago. 



Highland -Intermedia te . 



"^■'Sesleria caerulea. 



English- Germanic . 



Sium latifolium. 

 CEnanthe phellandrium. 

 Lemna gibba. 



Atlantic-British. 



Hypericum androssemum. 

 *Lastrea semula. 



