Charles Darwin's Works
Format: Paperback
ISBN13: 9780217190459
Paperback|9780217190459
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER It Habits Of Worms?continued. Manlier in which worms seize objects?Their power of suction? The instinct of plugging up the mouths of their burrows? Stones piled over the burrows?The advantages thus gained? Intelligence shown by worms in their manner of plugging up their burrows?Various kinds of leaves and other objects thus used?Triangles of paper?Summary of reasons for believing that worms exhibit some intelligence?Means by which they excavate their burrows, by pushing away the earth and swallowing it?Earth also swallowed for the nutritious matter which it contains?Depth to which worms burrow, and the construction of their burrows?Burrows lined whh castings, and in the upper part with leaves?The lowest part paved with little stones or seeds?Manner iu which the castings are ejected?The collapse of old burro ws?Distribution of worms? Tower-like castings in Bengal?Gigantic castings on the Nilgiri Mountains?Castings ejected in all countries. Ix the pots in which worms were kept, leaves were pinned down to the soil, and at night the manner in which they were seized could be observed. The worms always endeavoured to drag the leaves towards their burrows; and they tore or sucked off small fragments, whenever the leaves were sufficiently tender. They generally seized the thin edge of a leaf with their mouths, between the projecting upper and lower lip; the thick and strong pharynx being at the same time, as Perrier remarks, pushed forward within their bodies, so as to afford a point of resistance for the upper lip. In the case of broad flat objects they acted in a wholly different; manner. The pointed anterior extremity of the body, after being brought into contact with an object of this kind, was drawn within the adjoining rings, so that it appeared truncated and became...
| ISBN-13 | 9780217190459 |
|---|---|
| ISBN-10 | 0217190456 |
| Weight | 0.45 Pounds |
| Dimensions | 9.00 x 6.00 x 0.31 In |
| List Price | $19.99 |
| Format | Paperback |
|---|---|
| Pages | 132 pages |
| Publisher | |
| Published On | 2009-08-01 |
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