HELMINTHOLOGY-HELMINTHES CYSTICI.

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to notice that the name “ Acephalocystis,” so fertile a causeof misconception, begins, in France , to give way to the sys-tematic term Echinococcus. Thus Mayor (Archives gene-rates, 1843, Juill. p. 320; or Gazette Medicale, 1843, p.821) advises his countrymen to change the inappropriatedesignation of “ Acephalocyst,” given by Laennec, into thebetter name of Echinococcus. He describes the brood of thisCyst-worm perfectly correctly; the vesicles, in which theyoung are developed, and which bud out from the internalsurface of the mother-cyst, are designated by him “ capsulesde l’Echinocoque,” in order to distinguish them from thetrue mother-cyst, which he terms “ hydatide.” The deli-cate internal membranous lining, from which the “ capsulesde l’Echinocoque” spring, is named by him “ membranecapsulaire.” He asserts very correctly, that a “cyste”may contain hydatids (Echinococcus-cysts), some of whichinclude very many “ capsules de hEchinocoque,” othersvery few, and lastly, some which present no trace of them.

A very good Monograph has been published by Livois(ltecherclies sur les Echinocoques cliez l’Homme et chez lesAnimaux, 1843, Paris ; vid. The British and ForeignMedical Review, No. 33, 1844, p. 194), which explains veryclearly the distinction between serous cysts and the Echi-nococcus. The author had the opportunity of examiningvery many so-called Acephalocysts, and says that he neverfailed to find the minute Echinococci; as lor the rest, heregards the well-known, already frequently mentioned, cal-careous corpuscles in the interior of the young, as ova orgerms, and moreover is unable to detect any differencebetween the Echinococcus hominis and the Echinococcus ofother animals.

In a Dissertation written by Thiel (Ueber den Echi-nococcus, Dissert. Wiirzb. 1844) there is an interestinganalysis by Scherer of the membranes of the Echinococcus-cysts. The membranes consist of albumen, their fluidcontents of water with salts, without a trace of albuminousmatter ; 1000 parts of the whole mass when dried left a