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family hiantes, (of Illiger;) many, perhaps most, of 
the waders and swimmers: hawks, rooks, the pas- 
serine genera, the gallinaceous, &c. finding all their 
food by daylight, sleep throughout the night. Of 
the amphibia a great part sleeps by day: frogs and 
toads come out by night in abundance: tortoises 
appear to be diurnal feeders, and to love the sun: 
turtles sleep much by day, but feed in the morning 
and evening: the lizard tribes in general are lovers — 
of heat, and seek their prey in sunshine: the serpent 
tribes sleep and feed both by day and by night. Of 
fish, those which take ground baits, or feed at the 
bottom of waters, seek their food rather by night 
than by day. The land crustacea shun the blaze of 
noon, and feed by twilight: the aquatic feed (per- 
haps at intervals) by day and night. Snails and 
slugs, the species of mollusca with the habits of 
which we are best acquainted, feed at night more 
than by day, except in rainy or cloudy weather. 
Nautili, after sporting at noon on the surface of the 
calm Indian sea, may probably require night-sleep. 
Scallops, which, when deserted by the tide, move 
themselves by jerking motions of their shells back 
to the water, are said also to sail on the smooth sur- 
face of the calm sea, using one valve as a boat, the 
other as a sail, and forming little fleets. These, as 
well as nautili, may require a night’s repose, while 
the oyster, fixed to the sunken rock or submarine 
roots or stakes, feeds chiefly by night. I have 
omitted insects: but the habits of many are so fa- 
miliarly known, that a mere notice will suffice to il- 
