. Elementary text-book of zoology. Zoology. 336 YERMES. has a very irregular shape; while that form which inhabits domestic animals, E. soolicipariens, more frequently retains the form of the simple vesicle. Finally these echinococcus cysts frequently remain sterile, in which case they are called Acephaloct/sts. Another and indeed pathological form is the so- called multilocular Ecldnococcus. 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 (Jiythttid plag
. Elementary text-book of zoology. Zoology. 336 YERMES. has a very irregular shape; while that form which inhabits domestic animals, E. soolicipariens, more frequently retains the form of the simple vesicle. Finally these echinococcus cysts frequently remain sterile, in which case they are called Acephaloct/sts. Another and indeed pathological form is the so- called multilocular Ecldnococcus. 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 (Jiythttid plague) was widely spread in Iceland. This disease likewise seems endemic in many places in Australia. T. (Microt&nia). The Cysticercold 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. cuciont'ritiu 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 [Tricliodcctcs cams). The infection with the Cysticercoids 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. cUiptica Batsch. in the intestine of the Cat, occasionally in that of Man. T. iiana Bilh. v. Sieb. in the intestine of the Abyssinians, hardly an inch long. T'. flavopunctata Weinl. in the human intestine (North America). The Cysb'cercoids of the Meal-worm are probably developed into tape-worms in the intestines of Mice and Eats. In other partially unarmed Tffnin&g
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
