Ponds And Rock Pools, With Hints On Collecting for And the Management of the Micro-Aquarium
The book Ponds And Rock Pools, With Hints On Collecting for And the Management of the Micro-Aquarium was written by author Henry Scherren Here you can read free online of Ponds And Rock Pools, With Hints On Collecting for And the Management of the Micro-Aquarium book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Ponds And Rock Pools, With Hints On Collecting for And the Management of the Micro-Aquarium a good or bad book?
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All are small : the fresh-water forms are generally elongated ; marine Planarians are more leaf-like. If they are ' WORMS ' 107 divided, each part will continue to live and develop a new portion corresponding to that which has been cut away. Just above these are the Flukes, which lead a parasitic life, some on the skin of their hosts and others in the intestines. The common Liver- fluke {Distoiniiin hepatiaim) is a good example of the develop- ment of these creatures ; and in one of its stages ...— the Cer- caria — it is sure to be met with by collectors. The embryos are voided from the todies of slieep, and hatched in water, leading a free-swimming life for a little while. Then, if things go well with them, they bore their way into water-snails, where they increase and multiply^ giving rise to forms unlike themselves. From these a free-swimming form (the Cercaria), like a micro- scopic tadpole, arises, and this makes its way on land, and if eaten by sheep bores into the liver, causing the disease called the 'rot.' Next to these come the Tape-worms, which may be dismissed with mere mention.
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