HELMINTHOLOGY HELMINTHES CYSTICI. 485 



to notice that the name " Acephalocystis" so fertile a cause 

 of misconception, begins, in France, to give way to the sys- 

 tematic term Echinococcus. Thus Mayor (Archives gene- 

 rales, 1843, Juill. p. 320; or Gazette Medicale, 1843, p. 

 821) advises his countrymen to change the inappropriate 

 designation of " Acephalocyst," given by Laeunec, into the 

 better name of Echinococcus. He describes the brood of this 

 Cyst-worm perfectly correctly ; the vesicles, in which the 

 young are developed, and which bud out from the internal 

 surface of the mother-cyst, are designated by him " capsules 

 de 1'Echinocoque," in order to distinguish them from the 

 true mother-cyst, Avhich he terms " hydatide." The deli- 

 cate internal membranous lining, from which the " capsules 

 de FEchinocoque" spring, is named by him " membrane 

 capsulaire." He asserts very correctly, that a " cyste" 

 may contain hydatids (Echiuococcus-cysts), some of which 

 include very many " capsules de TEchinocoque," others 

 very few, and lastly, some which present no trace of them. 



A very good Monograph has been published by Livois 

 (Recherches sur les Echinocoques chez 1'Homme et chez les 

 Animaux, 1843, Paris ; vid. The British and Foreign 

 Medical Review, No. 33, 1844, p. 194), which explains very 

 clearly the distinction between serous cysts and the Echi- 

 nococcus. The author had the opportunity of examining 

 very many so-called Acephalocysts, and says that he never 

 failed to find the minute Echinococci ; as for the rest, he 

 regards the well-known, already frequently mentioned, cal- 

 careous corpuscles in the interior of the young, as ova or 

 germs, and moreover is unable to detect any difference 

 between the Echinococcus hominis and the Echinococcus of 

 other animals. 



In a Dissertation written by Thiel (Ueber den Echi- 

 nococcus, Dissert. Wiirzb. 1844) there is an interesting 

 analysis by Scherer of the membranes of the Echinococcus- 

 cysts. The membranes consist of albumen, their fluid 

 contents of Avater with salts, without a trace of albuminous 

 matter ; 1000 parts of the whole mass when dried left a 



