0UK DOMESTICATED ANIMALS. 119 



Prior, taken from a purchased Westphalian ham, and 

 which I have elsewhere described. Here is represented 

 an equally characteristic fragment of uncooked measly 

 pork, taken from an old sow, and forwarded to me for 

 examination by Dr. Dobie, of Chester (Fig. 27). From 

 this small and thin slice of meat I removed no less than 

 thirty-three measles. As is now well-known, these 

 small bladder-worms or larval cestodes are the sexually 

 immature offspring of the Taenia solium, which, as a tape- 

 worm, has at present only been found in tine human 

 bearer. 



Decidedly one of the most important parasites of swine 

 is the Stejphanurus dentatus, or, as we may call it, the 

 crown-tailed strongle. From specimens o± a worm for- 

 warded to me by Dr. Fletcher, of Indiana, I had the 

 satisfaction of identifying its true character. When 

 first discovered in the United States, it was supposed to 

 be new to science, and was accordingly described by 

 Professor Yerrill under the name of Bclerostoma pingui- 

 cola. In the pages of the British Medical Journal for 

 January 14, 1872, I announced the discovery, and subse- 

 quently gave a more lengthened description of the 

 entozoon in Nature. Strange to say, I also shortly after- 

 wards detected this parasite amongst a batch of worms 

 sent for identification from Australia ; so that it appears 

 quite certain that the geographical range of this parasite 

 is co -extensive with that of the hog in its domesticated 

 state. At present, however, it has not been seen in 

 Europe, though doubtless we shall sooner or later dis- 

 cover it. 



Thousands of hogs are infested by this nematode, which 

 takes up its abode in the abdominal viscera, and espe- 

 cially in the fatty tissues surrounding these organs. The 



