412 
MR. IC GITRNEY ON THR CRUSTACEAN PLANKTON 
that o£ the shallow western part, and the same may be the case wiih Ulls- 
water, Windermere, and, perhaps, Coniston. liolopedium gibhenun was not 
found in any of Dr. Pearsall's collections from Windermere, but it was taken 
there many years ago by Beck, and again in 1912 by Mr. P. A. Buxton. 
It may be that it is a permanent inhabitant of the lake, but it is restricted to 
certain parts of it. 
Fig. 1. 
Map of the Eaglisli Lalve District, with section showing the relation of 
scenery and gradients to the underlying rocks. 
(By permission of Dr. W. H. Pearsall and the Council of the Eoyal Society.) 
I have thought it well to add notes on some of the species composing the 
plankton, and on the fauna of some of the high-lying lakelets or tarns, in 
order to o-ive a more complete picture of the crustacean fauna than would be 
conveyed by a statement of the composition of the plankton alone. 
