. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 336 TEKME8. has a very irregular shape; while that form which inhabits domestic animals, E. scolicijyaricnx, more frequently retains the form of the simple vesicle. Finally these echinococcus cysts frequently remain sterile, in which case they are called Acepfialocysts. Another and indeed pathological form is the so- called multilocular Echinococcus, which was for a long time taken for a colloid cancer. It is also found in Mammalia (in cattle), and here presents a confusing re- semblance to
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 336 TEKME8. has a very irregular shape; while that form which inhabits domestic animals, E. scolicijyaricnx, more frequently retains the form of the simple vesicle. Finally these echinococcus cysts frequently remain sterile, in which case they are called Acepfialocysts. Another and indeed pathological form is the so- called multilocular Echinococcus, which was for a long time taken for a colloid cancer. It is also found in Mammalia (in cattle), and here presents a confusing re- semblance to a mass of tubercles. The echinococcus disease (Jiydatid plague) was widely spread in Iceland. This disease likewise seems endemic in many places in Australia. T. (Microt&nia). The Cysticercoid form is small, and has but little fluid in the small portion which corresponds to the vesicle. The head is small, but has a small club- shaped or proboscis-like rostellum, and is furnished with weak hooks. The eggs are provided with several membranes. The embryo is usually furnished with large hooks. The Cysticercoid stages live prin- cipally in Invertebrates (in Slugs, Insects, etc.), and more rarely in cold-blooded Vertebrates (the Tench). T. cucumcrlna Bloch, in the intestine of dogs (house dogs). The Cysticercoid is entirely without the caudal vesicle, and lives (according to Melnikoff and R. Leuckart) in the body cavity of the Dog-louse (Trieliodectes canis). The infection with the Cysticcrcoids takes place when the dog swallows the parasites which are annoying him, while the para- sites swallow the eggs contained in fasces adherent to the hair of the dog. Nearly allied is T. ellijitica Batsch. in the intestine of the Cat, occasionally in that of Man. T. nana Bilh. v. Sieb. in the intestine of the Abyssinians, hardly an inch long. T. flavqpunctataWeial. in the human intestine (North America). The Oysticercoids of the Meal-worm are probably developed into tape-worms in the intest
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