Diseases of the Respiratory Organs. 



31 



described upon the mucous membrane about the bifurca- 

 tion are very distinct, and the worms can be seen in them. 

 The appearance is very like that met with in Case 4, and 

 the description need not be repeated. No parasites in the 

 intestines. Nothing abnormal found in the blood. 



" The general and specific characters of the worm may 

 be defined as follows : 



" Strongylus canis bronchialis. — A slender nematode hel- 

 minth,' body filiform, the female measuring about one- 

 fourth of an inch in length, the male smaller, measuring 

 one-sixth to one-eighth of an inch ; head conical, mouth 

 simple, unprovided with papillae ; tail of female obtuse, 

 anal and generative orifices terminal, opening by a cloaca ; 

 ovarian tube containing one row of eggs, which, in the ma- 

 ture species, have developed into slender-coiled embryos ; 

 tail of the male somewhat pointed ; penis consists of a 

 double spiculum of a yellowish-brown colour ; mode of re- 

 production viviparous. 



"Only occasionally,as stated above, were the worms found 

 lying free upon the bronchial membrane ; as a rule, they lay 

 imbedded in a localised granular swelling of the mucosa, 



Fig. 2. 



Head of Male 



Worm., 



Fig. 3. 



Tail of Female Worm, 



showing the young Embryos. 



from which portions of them protruded. They could readily 

 bepulledoutwithapair of fine forceps, but a stream of water 

 •did not wash them away. In several of the cases examined 



