lives in the intestine of man, and, as a bladder-worm (_Cysticercus_),
in the connective tissue of the muscles of the ox (and especially in the
calf). It is from twelve to twenty feet, with as many as a thousand
joints, but does not possess a circlet of hooks. The joints generally
leave the intestine one by one, and creep on to grass and herbs, where
they burst, so that the eggs are set free, and therefore get widely
distributed. The ox scarcely ever takes in several joints of _Tænia
saginata_, and consequently only a certain number of eggs. Beef never,
therefore, contains so many measles as pork, and there is not a special
measle disease of oxen. As, however, the eggs of _Tænia saginata_ are
more widely distributed, calves and oxen are more frequently infected
with bladder-worms than is the case with swine.