The number of species of the flat-fishes diminishes as the degrees of northern latitude increase. In this country we have twenty-three species; at the parallel of Jutland there are thirteen; on the coast of Norway they are reduced to ten; in Iceland the number is but five, and in Greenland only three. [Illustration: Halibut.] Many of them attain a considerable size, particularly the Halibut (_Pleuronectes hippoglossus_). In April 1828 a specimen seven feet six inches long and three feet six inches broad was taken off the Isle of Man, and sent to Edinburgh market. Olafsen mentions that he saw one which measured five ells; and we are told by the Norwegian fishermen that a single halibut will sometimes cover a whole skiff. Let us, however, remember that these stories proceed from the country where monstrous krakens and sea-snakes are most frequently seen, and where the mists of the north seem to produce strange delusions of vision. At all events, the halibut is better entitled to the name of _maximus_ than its relation the Turbot, to which that epithet has been improperly applied by naturalists. The turbot, equally esteemed by the ancients and the moderns for the delicacy of its flesh, is often confounded in our markets with the halibut, but may be easily recognised by the large unequal and obtuse tubercles on its upper part. [Illustration: Turbot.] The number of turbot brought to Billingsgate within twelve months, up to a recent period, was 87,958. Though very considerable quantities of this fish are now taken on various parts of our own coasts, from the Orkneys to the Land's End, yet a preference is given to those caught by the Dutch fishermen, who are supposed to draw not less than 80,000_l._ for the supply of the London market alone. According to Mr. Low, it is rare along our most northern shores, but increases in numbers on proceeding to the south. [Illustration: Sole.] Next to the turbot, the Sole is reckoned the most delicate of the flat-fishes. It inhabits the sandy shore all round our coast, where it keeps close to the bottom, indiscriminately feeding on smaller testaceous animals, crustacea, annelides, radiata, and the spawn and fry of other fishes. It is found northward as far as the Baltic and the seas of Scandinavia, and southward along the shores of Spain, Portugal, and the Mediterranean. The consumption is enormous, for Mr. Bertram informs us that no less than 100,000,000 soles are annually brought to the London market.[Q] They seldom take any bait, and are caught almost entirely by trawling. The principal fishing-ground in England is along the south coast from Sussex to Devonshire, where the soles are much larger and considered otherwise superior to those of the north and east. On the Devonshire coast, the great fishing-station is at Brixham in Torbay, where the boats, using large trawling nets from thirty to thirty-six feet in beam, produce a continual supply.