. The animal creation: a popular introduction to zoology. Zoology. ENTOZOA. 75 known concerning their general economy are, as yet, extremely few and unsatisfactory. One of the most common is The Hydatid {Cysticerciis), which not unfrequently infests the flesh of pigs, causing that diseased condition which is known as measly pork. Its body consists of a globose transparent bag, with a slender neck, terminated by a remarkable prehensile apparatus— consisting of a double row of recurved spines and four adhesive suckers—represented upon an enlarged scale upon tlie riglit-hand. Fig. 52.—riGUEE oi c
. The animal creation: a popular introduction to zoology. Zoology. ENTOZOA. 75 known concerning their general economy are, as yet, extremely few and unsatisfactory. One of the most common is The Hydatid {Cysticerciis), which not unfrequently infests the flesh of pigs, causing that diseased condition which is known as measly pork. Its body consists of a globose transparent bag, with a slender neck, terminated by a remarkable prehensile apparatus— consisting of a double row of recurved spines and four adhesive suckers—represented upon an enlarged scale upon tlie riglit-hand. Fig. 52.—riGUEE oi cisticeken. side of the figure. These simply-constructed animals, formerly re- garded as a distinct species, have been proved by recent experiments to be but an incomplete condition of The Tape-worms {Tenix), many species of which are met with in the alimentary canal of various animals, where they have been known to attain the length of sixty, or even a hundred feet. The body of the tape-worm consists of a great number of segments, some- times amounting to five hundred or more ; these become very slender as they approach the so-called head (scolex), from which they are all successively produced. The Flukes [Distoma) constitute a very numerous race, of which the Liver Fliihe, Distoma liepaticum, but too well known as inhabit- ing the liver of the sheep, will serve as an example. It resembles in shape a little sole, about an inch in length, furnished with two suckers, each of which was at one time supposed to be a mouth— whence the origin of their name. WJien sheep are pastured in low wet meadows, this animal often multiplies in them excessively, producing dropsy or rot, and finally causing the death of the poor creatures so infested. E 2. 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 Jones, Thomas Ry
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Keywords: ., bookauthorjo, bookcentury1800, bookdecade1860, booksubjectzoology
