OF THE ENGLISH LAKE DISTRICT. 
443 
others, and especially in young specimens, this angle is produced into a 
small papillit'orm projection. The crest is generally continuous over the eye, 
but is often so inconspicuous as to be seen with difficulty, while sometimes it 
is interrupted as in D. lonijisplna. 
An exactly similar Daplmia occurs in Hawes Water, but in such small 
numliers that I l)ave not had much material for examination. Nearly all the 
A. Daphnia hijiilina from Orummook, 29.9.22. Typical form for tJie lake. 
B. DaphnUt ki/alinn from Crummock, 27.8.20. Head of female of Lilljeborg-'s 
forma ccstimdis vionsfrona. 
U. Daphnia galcata from Ciummock, Sept. 1912. 
D. Bosiiiina obtusirostvis from Wastwaler, 30.9,22. 
specimens seen have the head quite rounded, but occasionally there is a 
slight trace of the dorsal angle so often seen in Esthwaite specimens. 
This form seems to be the same as that which is found in Loch Leven and 
Loch Lomond in Scotland, and was described by Richard (1896, p. 307) as 
D. lacustris var. vim^a, with the exception that the posterior .'<pinc in the 
Lake District form is usually directed more or less dorsally. 
