66 POULTRY DISEASES 



bird during the coughing which this causes. Care 

 must be exercised lest the trachea be injured. A 

 feather from which all barbs except the tip have 

 been removed may be dipped in turpentine, forced 

 down the trachea, and when the tip has passed 

 the mass of worms it may be twisted as it is with- 

 drawn. This usually results in their removal. By 

 referring to Plate 1, No. 34, the location of the 

 opening of the trachea through the larynx may be 

 seen. 



UNIMPORTANT ROUND WORMS 



There are other round worms that may infest 

 the intestinal tract, but which have not come un- 

 der the observation of the author. They are not 

 common, or important, to the poultry industry. 

 The list follows: 



Heterakis DifEerens 



This is a slightly larger species than the Heterakis papil- 

 losa. Its mouth has no apparent lips; the pharyngeal hulb 

 is distinct; there are two unequal spicula. It is found in 

 the posterior portion of the intestines of chickens. 



Heterakis Gompressa 



This is a round worm of about the size of the Ascaris 

 inflexa.' The tail ends in a sharp mucro. It is found in 

 the small intestines of chickens. 



Trichosomum 



Several species of this genus have been reported from 

 various parts of the world, but have not been observed by 

 the author in this country. They are shaped something like 

 the old-fashioned blacksnake whip. They are blood suckers, 

 and in the adult stage live in the small intestine. 



Heterakis Maculosa 



A round, white worm found in intestinal vesicles of the 

 pigeon. The female Is about three-fourths of an inch and 

 the female about one inch long. At times this worm is a 



