486

REPORT ON ZOOLOGY, MDCCCXLIV.

solid residue of 26*79, and when burnt, 4 - 57 of inorganicsalts, consisting of sulphate, phosphate, and carbonate ofsoda, chloride of sodium, and phosphate of lime. Thus thissolid residuum contained 22 - 22 protein substance, and 4*57salts. The remarks added by Thiel on the Echinococcus areof no value; the four acetabula are regarded as so manyoral orifices of the young Echinococci; which latter, afterthrowing off the crown of hooklets and the acetabula, aretransformed into acephalo-cysts, a proceeding, however, thathas not been directly observed by Thiel. Since, in Cattleand Sheep, the production of hydatids in the lungs andliver is much promoted by moist localities and unfavorableweather; it would appear, according to Thiel, that in manalso unfavorable endemic and epidemic conditions, connected,probably, with bad, innutritious food, might not be withoutinfluence in the production of the Echinococcus. He men-tions a case observed in the Julius Hospital, at Wurzburg ,in which a soldier, who had served, under very unfavorablecircumstances, in Greece , was affected with Echinococcus inthe liver and spleen. In another Dissertation, Mielay(Alex. Mielay de hydatidibus et cysticis, Pars prior Dissert.;Berolin, 1844) collects the older views respecting the originand propagation of the Cyst-worms, without being acquaintedwith the most recent researches on this subject. TheReporter has given a figure of the characteristic hookletsof which the circlets in the Echinococcus-brood are composed,as well as of the laminated structure of the cysts. (Vogel’sleones Histoiogias pathologicse, tab. xii, fig. xi.)

From Lebert’s description of the Echinococcus hominis wegather only what is already well known. His observation ofthe ciliary motion, which he thinks he perceived in theintei’ior of the still living and spontaneously moving animals,is new. Under “ spontaneously moving animals” can,however, be understood only the young of the Echino-coccus. It were much to be wished that Lebert had statedmore particularly where he saw the ciliary organs; at allevents, it is not made at all clear to the Reporter in what