Natural History Rambles. Lane and Field

Natural History Rambles. Lane and Field

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...How is a Slug to be distinguished from a Snail? The popular idea is that Snails have shells, and that Slugs have none. This, however, is wrong, for most Slugs have shells, though they are very small and delicate, and almost always hidden under the skin. I have now before me a shell which I took from a Grey Slug. Though the Slug was a large one, the shell is scarcely larger than a good-sized spangle, and not as thick, except at the edges. To extract the shell is not difficult, but requires a little care. First, kill the Slug by immersing it in boiling water, when death will be instantaneous. Then clear away the slime, and place the slug in a shallow vessel of cold water, pinning it by each end to a flat piece of cork loaded with lead. On the back, just behind the head, is a sort of hump, which is the "mantle" of the Slug; cut this open very carefully, and within it will be found the shell. It is very fragile, so that some care is needed to remove it without injury; but when dried it is tolerably strong, though exceedingly brittle. The best mode of showing it is to let it float upon a piece H of dark blue cardboard, lift it out of the water, and let it dry. It will adhere firmly to the cardboard without the use of cement, and can be examined with a lens. Now we have a little to say about the Snails, which; are quite as plentiful as the Slugs. The size and: position of their shells at once distinguish them, for the Snail is able to withdraw itself entirely into its shell, and so to obtain a shelter without needing to seek such retired spots as do the slugs. As far as the-animals themselves go, there is little difference between the Snails and the Slugs, and to the shells we must look as the chief, if not the only distinction. more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236549880
  • 9781236549884