PLATE III 



Fig. I. A natural gutter in the granodiorite rocks of Goudier Islet, Port 

 Lockroy, showing growth of Verriicaria elaeoplaca Vain, and Mastodia 

 tesselata Hook. f. and Harv. Photo. I.M.L., 3. i. 1945. 



Fig. 2. A small snowmelt water pool in a hollow of the granodiorite 

 rocks of Goudier Islet, Port Lockroy, with the water level bounded 

 by a zone of Verrucaria elaeoplaca Vain. The Verrucaria is also seen 

 lining the natural gutter which serves as a run-off from the pool. 

 Phot. I.M.L., 3. i. 1945. 



