. An introduction to zoology, with directions for practical work (invertebrates). 98 INTRODUCTION TO ZOOLOGY decaying matter. Some, such as the " vinegar eels" and " paste eels," have a wonderful power of withstanding desicca- tion, so that they may be wafted about in the air—a fact that explains their apparently mysterious appearance at times in weak vinegar or sour paste. PHYLUM Till.: POLYZOA, SEA-MATS OR CORALLINES These Polyzoans are nearly all marine colonial forms, and many of them are common well-known objects of the sea- shore. They are often mistakenly called Zoop
. An introduction to zoology, with directions for practical work (invertebrates). 98 INTRODUCTION TO ZOOLOGY decaying matter. Some, such as the " vinegar eels" and " paste eels," have a wonderful power of withstanding desicca- tion, so that they may be wafted about in the air—a fact that explains their apparently mysterious appearance at times in weak vinegar or sour paste. PHYLUM Till.: POLYZOA, SEA-MATS OR CORALLINES These Polyzoans are nearly all marine colonial forms, and many of them are common well-known objects of the sea- shore. They are often mistakenly called Zoophytes, though they are far removed from the true Goelenterate zoophytes (see p. 23). Per- Flustra, the, ^. Sea-mat. ^^^^ ^^^ common- est and best known is the Sea - mat (Flustra), which is thrown up after every storm on (From some parts of our coast, and soon looks like a dry brown seaweed. If obtained when first cast up, before it has dried, and then examined in sea-water under the microscope, it will be found to consist of a colony of individuals. Each has secreted round itself a horny substance, which has hardened into a little oblong cell, or " zooecium," decorated at each side with short spines and having an opening at the upper end covered by a little hinged lid. After a time, the tentacles of the creature within may be seen gradually pushing up the lid. The polyps are arranged in two layers, back to back; so whichever surface of the " mat" we look at, we get the same view of Fig. -<S5 51.—The Sea-mat [Flustra foliacea). tlie Oamhridge Natural History.) , Natural size, B' indicating the portion magnified in B; a, zooecium with closed 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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