. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. 39Q DEPTHS OF THE OCEAN of the coast-banks, and the genera Mora, Lepidion, and Halargyreus the uppermost part of the continental slope. The Acanthopterygii.—Fifty-one species belong to this very important and large group of highly developed fishes, most of which are true coast- bank fishes, only a few of them being known from the uppermost part of the slope. Most of these fishes, the Serranidae,
. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. 39Q DEPTHS OF THE OCEAN of the coast-banks, and the genera Mora, Lepidion, and Halargyreus the uppermost part of the continental slope. The Acanthopterygii.—Fifty-one species belong to this very important and large group of highly developed fishes, most of which are true coast- bank fishes, only a few of them being known from the uppermost part of the slope. Most of these fishes, the Serranidae, Sciaenidae, Pristipomatidse, Sparidae, Mullidae, Caproidae, Labridae, Scorpaenidae, Triglidae, Trachi- nidae, Uranoscopidae, and Callionymidae, are brightly-coloured fishes, with hard ossified scales and spines of moderate size, living in shallow water, or deeper, on the coast-banks, with a maximum distribution in warm subtropical waters. The northern limit of their distribution differs for different species, several extending even to the southern warmer parts of the bays and fjords of Scandinavia; other families, Cottidae and Blenniidae, have representatives in the Arctic (Trig/ops, Lumpenus). None of these families have, however, any economical importance in the Norwegian Sea or North Sea. The family Pleuronectidae, or flounders, includes very important food-fishes. The plaice, flounder, sole, dab, megrim, halibut, all belong to this family. Hippoglossus, Pleuronectes, and Zeugopterus are northern genera; Solea is the most important genus in the Atlantic, Solea vulgaris being of importance also in the southern parts of the North Sea. The Scombriformes, to which belong the genera Trachurus or Caranx, Scomber, Thynnus, are mostly pelagic, but are also caught very near to the shore. The mackerel, the tunny, the horse-mackerel are all economic species of great importance. Class—PISCES Sub-Class—ELASMOBRANOHII Order—PLAGIOSTOMI Sub-Order—SELACHII NOTJDANID^E Notidan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
