. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. MOLLUSCA. 275 earthy matter) than those of marine Mollusks, having to be carried on the back without the support of the Fig. 232.—A, Land-snail (Helix); B, C, A Slugs {Limax); E, F, G, Pond-snails (Limncea, Paludina, and Planorbis). Their eggs are laid singly, while the eggs of other orders are laid in chains. They are found in all zones, but are most numerous where lime and moisture abound. All feed on vegetable matter. A few are naked, as the Slu
. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. MOLLUSCA. 275 earthy matter) than those of marine Mollusks, having to be carried on the back without the support of the Fig. 232.—A, Land-snail (Helix); B, C, A Slugs {Limax); E, F, G, Pond-snails (Limncea, Paludina, and Planorbis). Their eggs are laid singly, while the eggs of other orders are laid in chains. They are found in all zones, but are most numerous where lime and moisture abound. All feed on vegetable matter. A few are naked, as the Slug; some are terrestrial; others live in fresh water. The Land - snails, represented by the common Helix, the gigantic Bulimus, and the Slug {Limax), are distinguished by their four " horns," the short front pair being the true tentacles, and the long hinder pair being the eye-stumps. They have a saw - like upper jaw for biting leaves, and a short tongue covered with minute teeth. The Pond-snails, as Limnaea and Planorbis, differ. 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 Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950. New York : Harper & Bros.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1883
