490 REPORT ON ZOOLOGY, MDCCCXLIV. 



Demarquay (Gazette Medicale de Paris, 1844, Nr. xix, 

 p. 308) has described an hydatid tumour, which produced 

 great pain in the left inguinal region of a man, forty-five 

 years old, and upon being opened, afforded many vesicles, 

 from the size of a hemp-seed to that of a pigeon's egg. 

 This was an Echinococcus colony, which, as was shown upon 

 inspection of the body five weeks afterwards, was seated 

 between the psoas and iliacus muscles ; death ensued, pro=- 

 bably from the profuse purulent discharge. In a case 

 observed by Stanley (London Med. Gaz. Oct. 1844, p. 101) 

 a moveable tumour presented itself on the fore arm, and one 

 above the breast of a healthy young woman ; both tumours 

 were looked upon as abscesses, and were opened with the 

 lancet. From that on the arm a thick purulent matter 

 escaped ; from the other, together with the matter, a vesicle 

 was expelled, which contained an Echinococcus progeny, and 

 was evidently inclosed in a cyst. Rose (ib. 1844, July, 

 p. 525) has given three cases of Echinoccus hominis, in one of 

 which hydatids were removed from an abscess in the liver ; 

 in another hundreds of vesicles were coughed up with 

 hemoptysis ; and in the third case hydatids were expelled 

 not only upwards through the lungs, but also downwards 

 through the intestinal canal [preceded by painful swelling 

 in the region of the liver]. The same observer found in 

 the lungs of a Monkey, which had long suffered from cough 

 and dyspnoea, a large colony of Acephalocysts. The lungs 

 in this instance contained seven considerable cysts filled with 

 hydatids ; the liver also, and the omeutuni and mesentery, 

 were loaded with similar cysts, in which several hydatids 

 of various sizes were inclosed ; only a few hydatids were 

 solitary in cysts, or free in the hypogastric region. Hose was 

 able to separate a delicate lamina from the internal surface 

 of these hydatids, which was beset with spherical, nucleated 

 corpuscles. Various cases of disease with hydatids in the 

 liver, lungs, and brain, related by Rayer (Gazette des Hopi- 

 taux, t. v, 1843, p. 581), Griffith (Med. Gazette, August, 

 1841, p. 585), Sturton (Lancet, January, 1841), and others 

 (Provincial Medical Journal, No. 171, January, 1844, p. 275), 



