ANOHYLOSTOMUM DUODENALE. 83 



membrane is perforated by a small opening, through 

 which blood is freely effused into the intestine, which 

 usually contains a considerable quantity of this fluid. 

 The mucous membrane frequently presents a number 

 of these ecchymoses, which are flattened, livid, and 

 of a brownish colour ; they are caused by the accu- 

 mulation of the blood which is effused between the 

 mucous and the muscular coats of the intestine. 

 The anchylostomum, having penetrated into the sub- 

 stance of the intestinal wall, is lodged within the 

 cavity whence the blood is poured out. 



According to the same author, the presence of 

 this entozoon produces anaemia, in consequence of 

 the small, but fr-equently repeated, hoemorrhage. 

 He also states that the disorder, which is known as 

 Egyptian Chlorosis, and which affects a large pro- 

 portion of the population, is due to tliis cause ; but 

 this has not yet been sufficiently estabHshed. 



This malady, which is probably peculiar to African 

 countries, attacks all classes of natives in Egypt. 

 It is characterised, in the less severe cases, by the 

 general pallor of the surface of the body, by pal- 

 pitation of the heart, by increased frequency of the 

 pulse, by lassitude upon the least exertion, and by 

 disturbance of the digestive functions. 



Its progress is ordinarily rapid, and it gradually 

 goes on until decided marasmus is produced. The 

 patient becomes very wasted, and weak ; and oedema 

 of the lower extremities supervenes. The skin, 

 which in the natural state is very tawny, assumes a 

 pale yellowish or greenish tinge, and at the same 

 time it is shrunken and cold. The conjunctiva is of 

 a bluish white colour, and all the mucous structures, 



G 2 



