. Fig. 141.—Cross-section of the liA'er of a lamb which died nine days after feeding with eggs of the niarginate tapeworm [Tcenia marginata). (After Curtis.) after an undetermined length of time, they become disintegrated and more or less calcified. If the hydatid is devoured by a dog or w^olf, either wdien the latter prey upon the secondary host or when the dog obtains the cyst at a slaughter-house, the bladder portion is destroyed, the scolex alone remaining intact in the digestive fluids. The head holds fast to the intestinal wall with its suckers and hooks ; by strobilation (transverse div


. Fig. 141.—Cross-section of the liA'er of a lamb which died nine days after feeding with eggs of the niarginate tapeworm [Tcenia marginata). (After Curtis.) after an undetermined length of time, they become disintegrated and more or less calcified. If the hydatid is devoured by a dog or w^olf, either wdien the latter prey upon the secondary host or when the dog obtains the cyst at a slaughter-house, the bladder portion is destroyed, the scolex alone remaining intact in the digestive fluids. The head holds fast to the intestinal wall with its suckers and hooks ; by strobilation (transverse division) it gives rise to the segments, which as we have already seen, together with the head, go to make up the adult tapew^orm. Kepro- ductive organs of both sexes develop in the separate segments, and eggs are produced, within which are developed the six-hooked embryos, the point from which we started. DISTOMATOSIS-LIVER FLUKE DISEASE—LIVER ROT. In France the name of distomatosis has been given to a disease caused by the presence of distomata in the bile ducts. It is the " liver rot " of England, the Eberfiiule of Germany, and is produced by the growth in


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