IU.aU. 
Fig. 49. — Loch nam Faoileag, showing eastern shore, composed of black vegetable 
sand through which white quartzite rocks protrude ; colony of Carex rostrata 
near the opposite shore. 
Fig. 50.-- Terrestrial form of Potamogeton natans ; Juncus effusus 
in the background. 
[Plate 25.— Referred to on page 1003. 
d 
Mr George West. 
