The Scientific Memoirs of Thomas Henry Huxley: Supplementary Volume, 3권Macmillan, 1903 - 90페이지 |
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Agassiz air bladder anal fin animal appear articulated base body branchial arches broad Calacanthus Calacanthus lepturus caudal fin Coelacanths Count Münster dorsal fin edge elongated Enniskillen evolution exhibits exo-skeleton extremity facts figure fin-rays fossil fishes frontal Ganoid genera Calacanthus genus genus Calacanthus Geological Glyptopomus granular grooved head Holophagus Holoptychius Huxley impression inter-apophysial bones interspinous bone jugular plates length lobe lower jaw Macropoma Macropoma Mantellii mandible margin median Museum of Practical nature nautilus neural arches opercula operculum organization ornamentation osseous ossified outer oyster pectoral arch pectoral fin posterior posteriorly Practical Geology present preserved rays remarkable represented in Pl resemble ridges salmon scales scientific sculpture sea fisheries second dorsal fin seen shell side Silurian Sir Philip Egerton skeleton skull snout species specimen represented spines striolaris structure surface tail teeth THOMAS HENRY HUXLEY Undina upper ventral fins vertebral column Vestiges Vestigiarian VIII visible
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70 페이지 - ... of meat or cheese. The same area at the bottom of the sea, on the best fishing grounds, yields a greater weight of food to the persevering fisherman every week in the year. Five vessels, belonging to the same owner, in a single night's fishing, brought in 17 tons weight of fish — an amount of wholesome food equal in weight to that of 50 cattle or 300 sheep.
13 페이지 - Preliminary Essay upon the Systematic Arrangement of the Fishes of the Devonian Epoch...
76 페이지 - The cod fishery, the herring fishery, the pilchard fishery, the mackerel fishery, and probably all the great sea fisheries, are inexhaustible : that is to say that nothing we do seriously affects the number of fish.
70 페이지 - The produce of the sea around our coasts bears a far higher proportion to that of the land than is generally imagined. The most frequented fishing grounds are much more prolific of food than the same extent of the richest land. Once in...
80 페이지 - MARTIN.— A COURSE OF PRACTICAL INSTRUCTION IN ELEMENTARY BIOLOGY. By Prof. TH HUXLEY, FRS, assisted by HN MARTIN, FRS, Professor of Biology in the Johns Hopkins University, USA New Ed., revised and extended by GB HOWES and DH SCOTT, Ph.D., Assistant Professors, Normal School of Science and Royal School of Mines. With a Preface by TH HUXLEY, FRS Cr.
10 페이지 - Eighthly, the fish and reptiles of the secondary rocks are as fully developed in their organization as those now living. The birds are represented by numerous foot-prints and coprolites in the Trias of New England, and by a few bones not yet generically determined, from Stonesfield and the English Wealden. Ninthly, the land quadrupeds of the secondary period are limited to two genera, occurring in the inferior oolite...
69 페이지 - Tyrian purple, which, from the richness and the variety of its hues, and from its wonderful stability, was prized more highly and sought after more eagerly than any other dye known to the ancients. Combining with this trade that in the metals, and especially in tin, these primitive corporations of Fishmongers gradually extended their operations, until they raised Sidon, and after the fall of Sidon, Tyre, to a position not less remarkable than that occupied by Venice in the Middle Ages, or by Liverpool,...
11 페이지 - Yet there are some who would shut out by easily comprehended but quite gratuitous systems of progressive transmutation and selfcreative forces, the soul-expanding appreciations of the final purposes of the fecund varieties of the animal structures by which we are drawn nearer to the great First Cause. They see nothing more in this modification of the skeleton, which is so beautifully adapted to the exigencies of the highest...
75 페이지 - Islands, the fish approach the shore in the form of what the natives call "cod mountains" — vast shoals of densely-packed fish, I2O to 180 feet in vertical thickness. The cod are so close together that Professor Sars tells us " the fishermen, who use lines, can notice how the weight, before it reaches the bottom, is constantly knocking against the fish.
76 페이지 - If we allow only .one herring to each codfish per diem, the cod in a square mile of shoal will consume 840,000,000 herring in a week. But all the Norwegian fisheries put together do not catch more than half that number of herring. Facts of this kind seem to me to justify the belief that the take of all the cod- and herring-fisheries, put together, does not amount to 5 per cent, of the total number of the fish. But the mortality from other sources is enormous. From the time the fish are hatched, they...