C8 WORM PARASITES. 



(2) Drepanidotcenia infundibuliformis, Railliet, is 

 a much larger species, sometimes reaching 240 mm. 

 in length. Hundreds of these worms are often 

 present in Fowls' intestines, the Cysticercus-stage 

 being passed in the Earthworm. 



(3) I). tetragona, Blanchard, which also is found in 

 numbers with its head buried in the intestinal villi, is 

 supposed to have the snail-genus Helix as its inter- 

 mediate host. 



The other life-histories are not known, and the 

 details of the species are not worth enumerating 

 here. 



Symptoms of Tamiosis. 



Young fowls that harbour tapeworms lose their 

 appetite, become emaciated, and gradually become 

 listless. Diarrhoea often sets in. The most im- 

 portant symptom, however, is the presence of the 

 segments (proglottides) in the dung. 



Treatment. 



Should Taeniosis, as now and then happens, become 

 epizootic amongst the birds, steps should be taken to 

 let the run be free from fowls for some time ; the 

 ground being purified with sulphuric acid, as men- 

 tioned in the article on Diphtheria. 



Each infested bird should be caged, so that its 

 droppings can be watched to see if the scolices of the 

 worms come out. Ail infested droppings should be 

 carefully burnt. 



