. An introduction to zoology, with directions for practical work (invertebrates). 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, cl
. An introduction to zoology, with directions for practical work (invertebrates). 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 Fig. 79.—The Common Limpet {Patella vulgaris). Practical Work on Water Snails How to ^^ order to keep water snails under close observa- start a tion, a, fresh-water tank is necessary. A rectangular tank Fresh-water is best, either one made entirely of glass, or one of Tank. -vvrood and glass, such as that the construction of which is fully described in Fresh Water Aquaria, by G. 0. Bateman. The aquarium should stand, if possible, in a north window, and should be covered with a sheet of glass or perforated zinc. If in a sunny window, the side of the tank next the window. 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
