488 REPORT ON ZOOLOGY, MDCCCXLIV. 



of the heart. With respect to the latter situation, he 

 has met with only two instances. In one of which, a 

 servant girl twenty-three years old who died suddenly, 

 there was seated in the " septum ventriculorum" a fibro- 

 serous, delicate-walled cyst, larger than a hen's egg, 

 which had burst, and whose equally large Acephalocyst had 

 been forced into the conus arterialis and pulmonary artery. 

 The liver also had been the seat of Acephalocysts, one as 

 big as a child's head, and two smaller ones. In the second 

 case, which was that of a soldier, thirty-five years of age, 

 who died suddenly, a rounded cyst, of the size of a duck's 

 egg, was seated in the most posterior and superior part of 

 the septum ventriculorum, which inclosed, besides a pul- 

 taceous, brownish fluid mixed with broken down, flocculent, 

 fibrinous coagula, the remains of Acephalocysts reduced to a 

 gelatinous consistence. Alessandrini also (Isis, 1843, p. 

 628) found, in the walls of the right ventricle of an Ox, an 

 Echinococcus veterinorum with young animals. Two cases 

 of hydatids of the liver and cavity of the pelvis, which were 

 certainly nothing else than Echinococcus hominis, have been 

 described by Nicolai. (Medizinische Zeitung, Herausg. v. d. 

 Verein f. Heilk. in Preussen, 1843, p. 107.) Another case 

 of hydatid formations in the lungs, communicated by Bou- 

 vier (Bulletin de 1' Academic Royale de Medecine, 1843, 

 t. viii, p. 1244), must also be here referred to. In the case 

 related by Dickson (Schmidt's Jahrbiicher, Bd. 39, 1843, 

 p. 294), in which a semi-cartilaginous sac filled Avith a 

 melicerous substance, in the liver of a man, twenty-five years 

 old, contained hydatids from the size of a pin's head to 

 that of an egg, and several others of the pill-box kind, a 

 colony of Echinococcus hominis cannot be mistaken. Eras- 

 mus Wilson (Dublin Medical Press, No. 399, Dec. 1844, 

 p. 361), having observed a case of Echinocccus hominis in 

 the liver, in which it is extremely probable that the pedicles 

 at the posterior extremity of the bod}^ of the young Echi- 

 nococci, by which they are connected with Echinococcus- 

 oapsules, struck his notice, proposes to name these animals 



