70 ENTOZOA FOUND IN MAN. 



principally situated upon the borders of the sea, and 

 of certain lakes, or rivers. It is well known only in 

 Europe. 



The taenia solium has been observed in Europe, 

 in Asia, in Africa, and in America, and it probably 

 exists all over the world. It has been stated by 

 Schmidtmuller that the Malays do not suffer from 

 cestoid worms, but the data upon which the assertion 

 is founded are incomplete. 



The taenia solium prevails in some countries of 

 Europe to the exclusion of the bothriocephalus, viz., 

 in England, France, Spain, Greece, Italy, Austria, 

 and Prussia. 



The bothriocephalus latus prevails to the almost 

 entire exclusion of the taenia in Switzerland and in 

 Russia ; both entozoa are more or less common in 

 Holland and in Sweden. 



These general facts admit of some exceptions, 

 either of a local or accidental character, and, in conse- 

 quence of its being brought from another district, 

 either of these worms may be observed in a district 

 which it is not ordinarily found in. 



The bothriocephalus is most common in Switzer- 

 land, and occurs so frequently at Geneva, that 

 Dr. Odier, a distinguished medical practitioner in 

 that city, states that nearly a fourth of the inha- 

 bitants are affected by it at some period or other 

 during their lifetime. This entozoon is also very 

 prevalent in those countries which are bounded by 

 the Baltic Sea. 



It has been observed that, with regard to the 

 part of Europe which comprises Russia and Germany, 

 the bothriocephalus is found only to the eastward of 



