DISEASES OP POULTRY. 



119 



ture was below normal; the appetite disappeared, and 

 the feet were swollen. These fowls often yawned, 

 and their torpor and anaemia were extreme; death 

 ensued in a tranquil manner 

 in the course of one or two 

 months. On postmortem ex- 

 amination there was observed, 

 in addition to the emaciation, 

 the lesions of a chronic diar- 

 rheic enteritis and the follow - 

 ing parasitic worms : Davainea 

 proglottina, Drepanidotesnia 

 infundibuliformis, D avaine a 

 cesticillus, Heterakis papu- 

 losa, Heterakis perspicillum 

 and Trichosoma collare. The 

 Davainea proglottina was the 

 principal cause of the malady 

 and in each case was found in 

 thousands. lih.Q H et e ra kis 

 papulosa and Heterakis per- 

 spicillum were less constant, 

 though they had taken a good 

 share in the development of the 



disease . Fis-. 26.-- Notocotyle vf rrucosum. 



Th& Heterakis maculosa often exists in enormous num - 

 bers in the intestines of pigeons and may be so disas - 

 trous in their effects as to prevent the raising of these 

 birds. As many as 400 to 500 of these worms may be 

 found in the intestine of one bird. A microscopic ex- 

 amination of the affected bird's excrement reveajs in- 

 numerable masses of the ova or eggs of the Heterakis. 

 In about 7 grams (2 drams) of excrement passed by a 



