. An introduction to the study of zoology. Zoology. MOLLUSC A. of classidcation. It is very common to find the halves of bivalve shells with a neat little round hole in them. This hole is the work of the odontophore of some carnivorous gasteropod. It will usually be found not far from the hinge, or in the neighbourhood of the adductor muscle of the bivalve; the shell opens wide when this is cut, leaving its tenant an easy Fig. 75.—Examples of Holostoniatous Gasteroporis. 1, The Wimble Shell, Turriteila terebra; 2, A Wentle-trap, Scalaria similis; 3, The Biver Snail, Paludini vivijpara;
. An introduction to the study of zoology. Zoology. MOLLUSC A. of classidcation. It is very common to find the halves of bivalve shells with a neat little round hole in them. This hole is the work of the odontophore of some carnivorous gasteropod. It will usually be found not far from the hinge, or in the neighbourhood of the adductor muscle of the bivalve; the shell opens wide when this is cut, leaving its tenant an easy Fig. 75.—Examples of Holostoniatous Gasteroporis. 1, The Wimble Shell, Turriteila terebra; 2, A Wentle-trap, Scalaria similis; 3, The Biver Snail, Paludini vivijpara; 4, Its operculum, with concentric mai-Kiiigs; 5, One hori- z jntal row of teeth from its odontophore, magnified. The shell of a gasteropod is usually spiral, but in a few cases it is flat, as in the common Limpet, or nearly so, as in the Sea Bar. It is usually considered that the carnivorous species of the Gaxteropoda may be known by a notch at the back of the shell; and according to the presence or absence of this notch, the Gasieropodahaye been classi-^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lindsay, B. London, S. Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
