DIBOTHRIOCEPHALUS LATUS 



217 



occasions is found in the domestic cat and fox. French Switzerland 



and the Baltic provinces of Russia are the centres of distribution ; 



from the former district the distribution radiates to France and 



Italy (Lombardy, Piedmont), from the Baltic 



Provinces over Ingermanland to St. Petersburg, 



over Finland to Sweden (on the shore of the 



Gulf of Bothnia), in a southerly direction to 



Poland, and into the Russian Empire and across 



it to Roumania, and towards the west along the 



coast of the Baltic Sea to the North Sea, where, 



however, its frequency considerably diminishes 



(Holland, Belgium, and the North of France). 



In Turkestan and Japan the " broad tape- riocephaius latus. 



,, . ., f .. f A., with the head 



worm is the most frequent parasite of man; it projected ; B., with 

 has been reported in Africa from the vicinity of the head drawn in. 



T . XT , _, , (From the muscular 



Lake N garni as well as from Madagascar; a case system of the pike.) 

 has also come under observation in North America 

 (Philadelphia). 



In Germany Dibothriocephalus latus apart from the fact that 



FIG. 145. A piece of the wall of the body of a Lota vulgaris. The tan- 

 gential section has laid open the muscles of the trunk with a plerocercoid of 

 Dibothriocephalus latus. (Natural size). 



it is undoubtedly imported from Switzerland, Russia or Italy is 

 particularly frequent in East Prussia amongst the inhabitants of 

 the low coast on the Baltic at Courland, and the district of the 



