. The practice of medicine; a text-book for practitioners and students, with special reference to diagnosis and treatment . - also bud endogenously and exogenously, and produce a thirdor fourth generation within or without themselves, the whole brood beingcontained within the mother bladder. The exogenous type—echinococcus exogenus of Kuhn—is less commonin man, but is frequently met in domestic animals, especially the pig. Inthis form the secondary bladders arise from small granular masses in thedeeper layer of the cuticle of the mother cyst, probably ultimately derivedfrom the parenchymal lay
. The practice of medicine; a text-book for practitioners and students, with special reference to diagnosis and treatment . - also bud endogenously and exogenously, and produce a thirdor fourth generation within or without themselves, the whole brood beingcontained within the mother bladder. The exogenous type—echinococcus exogenus of Kuhn—is less commonin man, but is frequently met in domestic animals, especially the pig. Inthis form the secondary bladders arise from small granular masses in thedeeper layer of the cuticle of the mother cyst, probably ultimately derivedfrom the parenchymal layer. They assume a special cuticular covering,and their central parts clear up and liquefy. As the centripetal formation. Fig. 105.—Section through an Echinococcus Cyst with Blood Capsules—{from Braun, aflcr Wax Model). of new layers in the cuticle of the mother bladder goes on, with rupture ofthe outer layers, the new formations make their way externally as separatesacs, and undergo subsequent development outside of the mother bladder,usually close to it, though at times, as in hydatids of bone, the indi\H[dualsof the restilting broods may lie at some distance from one another and fromtheir common parent. It is to a special variety of this latter that Virchowhas given the name echinococcus muUilocularis, wherein the cysts, becom-ing surrounded and joined together by thick capsules of connective tissue,form a hard tumor composed of vesicles the size of a pea, often resembling,en masse, colloid cancer. In the spaces are found remnants of the echino-coccus C3st, at times hooklets or scolices, by the discovery of wliich theirtrue nature is determined. At other times they are barren. Most casesof this fo
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