458 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
successful. The clams are preferred most in winter and 
least in summer, when they soon die. Since the shell 
valves do not fit closely, as already pointed out, Pecten 
cannot stand as much exposure to the air as most of our 
edible molluscs, and this will always be a difficulty in 
transporting to the markets. 
Pecten have been put to a most interesting use at the 
large trout hatchery of Howietown, near Stirling. The 
breeding trout in their fifth year are fed with more 
mussels and less horse flesh, and in the sixth vear clams 
(Pecten) are substituted for mussels. It is found that the 
ova from trout of six to eight years of age have a pink 
colour when the fish are fed on clams. Trout thus fed on 
clams yield the smallest number, proportionately, of eggs, 
but these are of the largest size and darkest colour, and 
these have been found to be the most valuable ova for 
rearing purposes. 
There seems to be no reason why the scallop should 
not become much more important as a source of food, and 
it is eaten both raw and cooked by those on the fishing 
erounds and a few others who are aware of the delicacy 
of its flavour. It has a peculiarly sweet taste, which is 
preferred by some to that of the oyster. At Billingsgate, 
Pecten maaimus (known in the trade as “ Kscallops”’) are 
not marketed in summer. The season begins in November 
and continues until March, and generally the demand 
appears to exceed the supply. During the winter season 
of 1907-08 the supplies were the hghtest for years, with 
prices, perhaps, the highest ever reached. Wholesale 
prices averaged from 25s. to 45s. per bag of twenty dozen. 
In the Liverpool Fish Market, the season is practically 
the same as at Billingsgate, viz., from November to May, 
and December is the heaviest month. The average 
number of scallops is about five hundred each week, and 
