94 THE DISEASES OF THE DOG. 



showed dirty brown frothy fluid in the passages, red 

 consolidation of the lungs (only partial, however) . " On 

 slitting up the windpipe the mucous membrane is found 

 covered with a dark frothy mucus. The membrane looks 

 pale and natural to within an inch of the bifurcation, but at 

 this point it becomes reddened, uneven from the projection 

 of irregular little masses of a greyish yellow colour, which 

 on close inspection are found to be localised swellings of 

 the membrane, containing small parasitic worms, the white 

 bodies of which can be seen lying upon, and partially 

 embedded in, these elevations. They are most abundant 

 just at the bifurcation, at the lower part of which several 

 have emerged, forming an elevation three or four lines in 

 height. About the orifices of the second divisions these 

 little masses are also seen, and the whole mucous mem- 

 brane of this region is deeply congested and somewhat 

 swollen. Very few of the worms are found lying free on 

 the mucous membrane ; almost all of them are attached to 

 the masses or buried in them. The smaller tubes, especially 

 those leading to the diseased portions of the lungs, are 

 filled with a dirty brown fluid, and on squeezing any 

 portion of the organ quantities of it can be expelled. 

 The bronchial glands are swollen." Bach little elevation 

 consisted of a nest of the parasites. Adult worms, free 

 embryos, and ova were detected in mucus from the smaller 

 tubes. The males were found to be smaller and less 

 numerous than the females. No abnormality of the blood 

 could be detected and no forms intermediate between the 

 free embryos and the adult worms could be found. Osier 

 terms the worm Strongylus canis hroncMalis ; the largest 

 measure a quarter of an inch in length. He argues out the 

 mode of invasion and supposes that the dried embryos are 

 inhaled with the breath, and lighting on the mucous mem- 

 brane find suitable conditions for their development. In 

 two out of the eight bodies examined by, him no parasites 

 were found although pneumonia was present. But the 

 phenomena of the enzooty seem to stamp it as truly para- 

 sitic, and naturally the youngest dogs, as having' the 

 least resisting power, were those which succumbed to the 



