British Conchology: Marine shells, and naked mollusca to the end of the gastropoda, the pteropoda, and cephalopoda; with a supplement and other matter, concluding the workJ. Van Voorst, 1869 |
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Acton Adriatic Alder and Hancock animal Arcachon Bell Blainville BODY Bohuslän branchial processes Brit broad brown colour conical Crag Crosskey Crosskey and Robertson Dalmatia Dalmatia Brusina Doris dorsal tentacles dredged edges filaments foot Forbes front Gascony Gascony De Folin Gastropoda genus gills HABITAT head head-veil Hebr Italy laminated Linné lobes Loffoden Lovén M'Andrew M'Intosh Madeira Watson Magnus Bay mantle margin Mario Conti Mediterranean minute Moll Mollusca Monte Mario Monte Mario Rigacci Mörch mouth Naples narrow nearly Norway Norway Sars Nudibranchs numerous odontophore operculum oral outer oval pale pallial papillæ Philippi Pisa Manzoni plates Portrush posterior Risso rounded rows Sars sheaths shell Shetland short Sicily side slender slightly smooth species specimens spines spire spots Stefanis stout striæ suckers Sweden Lovén tapering Taslé tentacles linear Tiberi tide-marks tips tripinnate tubercles valve vent Vienna basin whitish whorls yellow yellowish yellowish-white
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Página 241 - PORTLOCK. -REPORT ON THE GEOLOGY OF THE COUNTY of LONDONDERRY, and of Parts of Tyrone and Fermanagh, examined and described under the Authority of the Master-General and Board of Ordnance. By JE PORTLOCK, FRS &c.
Página 229 - Enough, if something from our hands have power To live, and act, and serve the future hour; And if, as toward the silent tomb we go, Through love, through hope, and faith's transcendent dower, We feel that we are greater than we know.
Página 21 - ... rotiferous animalcule than, a Mollusk. It is inclosed in a transparent, calcareous, nautiloid shell, with an operculum. Its structure is very simple, showing no signs of the external organs that distinguish the future adult. The principal portion visible outside the shell is composed of two flat discs or lobes, fringed with long cilia, by the motion of which it swims freely through the water. These are often withdrawn into the shell, and the operculum is closed upon them when the animal is at...
Página 21 - ... and Purpura, species which do not undergo any metamorphosis. The spawn of the Nudibranchiate Mollusca is deposited in the shape of a gelatinous band, always arranged in a more or less spiral form, and fastened to corallines and the under sides of stones by one of its edges. The ova are minute and very numerous, amounting in some species to several thousands. Before the period of exclusion, the young may be seen revolving on their own axis by means of vibratile cilia, and on escaping from the...
Página 136 - When it does take to swimming, it darts very quickly through the water and is difficult to catch. When taken out of the water and placed on the hand, it had recourse to an odd mode of progression, turning two or three...
Página 130 - ... until they are left high and dry. The body is beautifully spotted with colors, which seem to vary with the emotions of the animal. At one moment they are a vivid red, at the next a deep blue, violet, brown, or orange. They devour immense numbers of small fish, and it is amusing to watch their movements and see how, at a distance of several feet, they will poise themselves, and in an instant, with the rapidity of lightning, the prey is seized in their long arms and instantaneously swallowed.
Página 229 - Multum egerunt qui ante nos fuerunt, sed non peregerunt : multum adhuc restat operis, multumque restabit : nee ulli nato post mille secula praecludetur occasio aliquid adhuc adjiciendi...
Página 232 - HUEEAH for the dredge, with its iron edge, And its mystical triangle, And its hided net, with meshes set, Odd fishes to entangle.
Página 125 - sea-arrows," or " flying squids," from their habit of leaping out of the water, often to such a height as to fall on the decks of vessels. They leave their eggs in long clusters floating at the surface.
Página 21 - The principal portion visible outside the shell is composed of two flat discs or lobes, fringed with long cilia, by the motion of which it swims freely through the water. These are often withdrawn into the shell, and the operculum is closed upon them when the animal is at rest. We have not yet been able to trace the animal further than the first stage of its development, and are therefore unable to say by what process it assumes the very different form of the adult state. We have succeeded in bringing...