Pror. Boy. Soci/. of Ed in. '\ 



[Vol. XXX. 



Fig. 87. — Black Loch, North Fife. A jjortion of the zone of Cabtalia speciosa and 

 Nym])hEea hitea which encircles the lo(!h. The Nj'mi)hsea is in the foreground 

 next to the shore, with its leaves Hat on the surface of the Avater, and its Howers 

 raised above the surface. The Castalia is beyond, and has its leaves i)artially 

 above the surface, and its Howers on the surface of the water (compare figs. 

 21, 31, and 61). 



Fia. 88. — Lochmill Loch, North Fife. View from near the effluent at the east 

 end, looking west, showing in the foreground marsh vegetation, which is 

 largely composed of Glyceria Huitans, and beyond this a wide zone of Poly- 

 gonum amiihibium mixed with Potamgeton natans, which extends along the 

 north shore. Hills, with plantations, enclose the loch, excepting at the east end. 



Mr George West. [Plate '^^.^ Referred to on page 149. 



