212 ANIMAL PAKAS1TES. 



monia and magnesia, and a small quantity of cliolesterine and 

 crystals like dumb-bells, which might be easily taken out of the 

 cavities. Between the gelatinous matter and the inner surface 

 of the alveoli there were, sometimes, calcareous deposits, which 

 often completely surrounded the former. The gelatinous mass 

 itself, to which the inner wall of the alveolus exactly fitted, was of 

 a roundish elongated form, folded, and beset with ridge-like 

 processes internally, or with indentations externally. The so- 

 called colloid-vesicles, which were of various sizes (0*012 Imill.), 

 consisted, especially the smaller ones, of colourless, transparent, 

 structureless, soft, elastic, extensible masses (0-004 or O'Ol to 

 0-016 or 0-020), with tolerably thick walls, furnished with a fine 

 concentric striation. In these, in Zeller's case, there were 

 young Echinococci in the interior of the alveoli, placed in one 

 series, or, more correctly, in the interior of the colloid-vesicles 

 which were situated in these alveoli, which were placed more 

 towards the periphery of the liver. The colloid-mass formed the 

 clothing of all the alveoli, and formed a perfectly clear, thin, soft 

 layer, which was easily torn into shreds. The Echinococcus-vesicle 

 (daughter-vesicle) lay free in the cavity enclosed by this colloid- 

 mass, that is to say, notwithstanding Zeller's process, by the 

 mother-vesicle of the Echinococcus. This Echinococcus-ves\c\e was 

 collapsed, yellowish, folded, might easily be taken out whole, and 

 when cut open exhibited the little Echinococci sitting upon its 

 inner surface, like fine white sand. The walls of the daughter- 

 vesicles were of a brownish colour, and sprinkled with corpuscles 

 of O'OOS 0'04 millim. in diameter. These corpuscles were oval, 

 globular, pyriform, kidney-shaped, or flattened laterally, some- 

 times with an indistinct, sometimes with a regular and distinct 

 stratification into 2 3 or more layers, which were generally 

 0*0013 millim. in thickness, rarely radially striated, colour- 

 less, yellow, or even of a fine green colour. They became 

 clear in the mineral acids, and in acetic and tartaric acids, some- 

 times with an abundant evolution of carbonic acid (carbonate 

 of lime), sometimes without evolution of gas for a long time ; the 

 latter also sometimes commenced very suddenly after the long 

 action of the acids, but was very rarely entirely wanting. When 

 treated with sulphuric acid, crystals of sulphate of lime shot out 

 in tufts of needles, in single, well-formed crystals, lying on one 

 another in four-sided tables, or in swallow-tail-like twin crys- 

 tals, so that we must suppose that the corpuscles consisted of 



