. An introduction to zoology, with directions for practical work (invertebrates). MOLLUSC A 123 secretion of which a very highly valued purple dye used to be obtained in ancient Fio. 78.—The Common Cowry [Cypraea {Trivia) europoea). a. The reflected mantle. Patella. Patella differs from those thus far considered, Tl^^fmnet ^" having a simple conical shell, and also in having —instead of the typical gill of the others—a ring of delicate, vascular, plate-like outgrowths from the under sur- face of the mantle, which can be projected just beyond the foot. It is in these plates that th
. An introduction to zoology, with directions for practical work (invertebrates). MOLLUSC A 123 secretion of which a very highly valued purple dye used to be obtained in ancient Fio. 78.—The Common Cowry [Cypraea {Trivia) europoea). a. The reflected mantle. Patella. Patella differs from those thus far considered, Tl^^fmnet ^" having a simple conical shell, and also in having —instead of the typical gill of the others—a ring of delicate, vascular, plate-like outgrowths from the under sur- face of the mantle, which can be projected just beyond the foot. It is in these plates that the blood is aerated. The Common Limpet {Patella vulgaris) lives in great numbers all round our coasts, clinging so closely to the rocks when these are left un- covered at low tide, that water is shut into the shell, and so the gills are kept moist till high tide again. When sub- merged, the animals loosen their hold and move about, feeding on seaweed, but each returns to the same rock after feeding and often wears away a little basin by constantly clinging to the same spot—its own little foothold of 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 Lulham, Rosalie Blanche Jermaine. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
