2.1 JOURNAL OF CONCrtOLOGY, VOL. l6, NO. 1, JANUARY, I9I9. 



relation between size and habitat are likely true only of the neigh- 

 bourhood of Portmadoc ; the influence of shading and exposure is 

 prima facie related to the prevailing climatological conditions, and 

 what produces grateful dampness in Kent may give us a horrid bog 

 in North Wales. 



c- i, 



•■ il« .•G 



^ 



1 mile 



Fig. I. — Map showing the loci : the Glaslyn river and the 500 feet 

 contour are also indicated. 



