. The American entomologist. Entomology. THE AMEEICAN ENTOMOLOGIST. 89 A MEASLY AVILD DUCK. It is well known that, viiider certain circum- stances, the flesh of the hog becomes full of white bladder-like substances, about tlie size of a large pea, and that the pork is then said to be "; These little bladders are iu reality living animals, belonging to the same order (^Mutozod) of the great class of "Worms, as the various species of worms found in the bowels of man. Formerly they were called cystadids, and supposed to be perfect animals, and how they got into the flesh of
. The American entomologist. Entomology. THE AMEEICAN ENTOMOLOGIST. 89 A MEASLY AVILD DUCK. It is well known that, viiider certain circum- stances, the flesh of the hog becomes full of white bladder-like substances, about tlie size of a large pea, and that the pork is then said to be "; These little bladders are iu reality living animals, belonging to the same order (^Mutozod) of the great class of "Worms, as the various species of worms found in the bowels of man. Formerly they were called cystadids, and supposed to be perfect animals, and how they got into the flesh of the hog was a mystery. Of late years, however, it lias been clearly ascer- tained tliat they are merely the larva state of the well known Tape-worm; and that, when measly pork is eaten raw, the bladder-like creature sometimes passes alive into the human intestines, and there gradually develops into the tape- worm. Knowing what we do of the fllthy habits of the hog, it is not difficult for us to understand how the minute eggs of the tape-worm may oc- casionalljf pass, in considerable numbers, from the human body into the body of a hog, and there generate a large stock of the bladder-like substances spoken of above. "We have recently been shown the bod)- of a male wild duck, or Mallard, which was so full- of a new and undescribed kind of cystadid, that you could not put your finger upon any portion of the flesh without touching some. At first sight they had the appearance of a immber of very elongate kernels of wheat imbedded in the muscles. But on a closer examination they proved to be bladder-like sacks, without any ex- ternal articulalions whatever, from one-fifth to one-fourth of an inch long, about four times as long as wide, of a cylindrical shape, tapered a little at each end, and filled internally with a viscid yellowish substance. If introduced, along with a portion of the raw flesh of the duck, into the human stomach, they would probably have developed into some ki
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectentomology, bookyear1
