DISEASES OF THE RESPIRATORY ORGANS. 



29 



into slender-coiled embryos ; tail of the male somewhat 

 pointed ; penis consists of a double spiculum of a yellowish- 

 brown color ; mode of reproduction viviparous. 



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

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

 imbedded in a localized granular swelling of the mucosa, from 



which portions of them protruded. They could readily be 

 pulled out with a pair of fine forceps, but a stream of water 

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

 (more especially Case 4) the whole mucous membrane of the 

 affected part appeared rough and irregular, as if ulcerated, 

 and innumerable parasites lay upon and in it. The mature 

 females could easily be distinguished, not only by their larger 

 size, but by the opaque whiteness of their bodies. The ma- 

 jority of the female worms examined were immature, and did 

 not contain developed ova. The males were not nearly so 

 numerous as the females. Forms intermediate between the 

 adult worms and the young embryos (some of which, as 

 already mentioned, existed free in the mucus) were not met 

 ■with. 



" The occurrence in the bronchial tubes of the lower ani- 

 mals of nematoid worms belonging to the genus strongylus is 

 by no means uncommon. Owing to the irritation caused by 

 their development in the mucous membrane an inflammation 



