8 
BRITISH ENTOMOSTRACA. 
ferior ones were more or less partially decomposed. The 
marine species are also preyed upon by their different 
enemies ; amongst which are the Heroes. “ The fact of 
Beroes feeding upon small Crustacea,” says Mr. Paterson, 
“ has been recorded by Pabricius, and at present appears 
to rest upon his authority. It was interesting to observe 
the fad , which I did without knowing it was previously 
known. The Crustacea were almost as visible in the trans- 
parent body of the Beroe as they had previously been, and 
very conspicuous by the bright green of their colouring.”* 
That the Entomostraca form a considerable portion of 
the food of fishes has been long observed ; and it is very 
probable that the quality of some of our fresh- water fishes 
may in some degree depend upon the abundance of this 
portion of tlieir food. Dr. Parnell informs me that the 
Lochlevin trout owes its superior sweetness and richness 
of taste to its food, which consists of small shells and 
Entomostraca. The colour of the Lochlevin trout, he 
farther informs me, is redder than the common trout of 
other localities. When specimens of this fish have been 
removed from the loch, and conveyed to lakes in other 
places, the colour remains ; but they very soon lose that 
peculiar delicacy of flavour which distinguishes so remark- 
ably the trout of Lochlevin. The experiment has been 
repeatedly tried, and always with the same results. The 
ban stickle devours them with great rapidity, and I have 
seen two or three individuals clear in a single night a 
large basin swarming with Daphnise and Cyclops, &c. 
* Letter from Mr. Paterson to Mr. Templeton, in the Memoir on Ano- 
malocera, in Trans. Ent. Soc., ii, part i, 39. 
