. An introduction to zoology, with directions for practical work (invertebrates). MOLLUSC A 137 at the hind end of the very long body. The yellow-brown body is marked by two conspicuous lateral grooves for disseminating mucus ; unlike other snails its body is narrowest. Fig. 88.—The Carnivorous Slug {Testacella). in front and broadest at the hind end. This slug lives largely underground, and in cold weather forms a kind of cocoon of slime and earth. The eggs are laid singly, instead of in clusters as in most slugs. Each egg is about -J-th of an inch across. Classification of the Univalve Mollu
. An introduction to zoology, with directions for practical work (invertebrates). MOLLUSC A 137 at the hind end of the very long body. The yellow-brown body is marked by two conspicuous lateral grooves for disseminating mucus ; unlike other snails its body is narrowest. Fig. 88.—The Carnivorous Slug {Testacella). in front and broadest at the hind end. This slug lives largely underground, and in cold weather forms a kind of cocoon of slime and earth. The eggs are laid singly, instead of in clusters as in most slugs. Each egg is about -J-th of an inch across. Classification of the Univalve Molluscs mentioned in Chapters IX. and X. Order I. Pulmonata. Those breathing with a "lung"; hermaphrodite forms. Sub-order 1. Basommatophora. Water snails in which the eyes are at the base of the non-retractile tentacles. Family 1. Lininaeidae. Water snails with fragile dextral shells in which the lung-sac is protected by an external lobe of, the mantle. Limnaea, the Common Pond Snails. Planorbis, the Trumpet or Flat-coiled Snails. Ancylus, the Hooked Snails or Fresh-water Limpets. Family 2. Physidae. Water snails with sinistral shells, over the margin of which the mantle is reflected. Physa, the Thread-spinning Snails. Sub-order 2. Stylommatopliora. Land forms with two pairs of hollow retractile tentacles, and with an eye at the tip of each of the upper 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
