172 DE. T. S. COBBOLD OX CESTOID ENXOZOA. 



wbicB. convinced Mr. Simonds (who watched the animal almost 

 daily) that we had here, at least, a feeble development of those 

 symptoms of the "acute cestode tuberculosis" which were so 

 strongly marked in our first experiment on a calf. There was 

 the same vacant stare, a dull expression of the eye, slight arching 

 of the back, and stretching of the limbs. However, the heifer 

 never lost her appetite, and, strange to say, whilst all the cattle 

 near her were attacked by (and most of them died of) the rinder- 

 pest, she entirely resisted its invasion. In about a week all the 

 measle-symptoms passed off, and in course of time the animal 

 attained the proportions and aspect of a large, healthy, three-year- 

 old cow. It was not until the expiration of rather more than a 

 year from the time of our first feedings, namely on the 4th of April 

 1866, that the beast was slaughtered. With Mr. Pritchard's as- 

 sistance I made a very careful dissection and examination of the 

 beef thus obtained ; nor was it until I had subjected the muscles 

 for many minutes to a very close and careful scrutiny (with the 

 aid of a pocket-lens) that I succeeded in detecting evidence of 

 the successful character of our experiment. The result was most 

 interesting, especially since none of the previously recorded expe- 

 riments (either by ourselves or those previously instituted by 

 Leuckart and Mosler) had extended over such a period of time. 

 Here the only indication of the j)resence of measles was shown 

 by the existence of extremely minute calcareous specks, larger, it 

 is true, but by no means so conspicuous as ordinary Trichina- 

 capsules. They presented the aspect of sparsely scattered yel- 

 lowish points without any definite outline or any other character 

 likely to catch the eye. It is even difficult to see them in 

 sections of the flesh which I have expressly preserved to show' 

 them. Microscopic examination aff'ords evidence of the remains 

 of a small cyst ; but aU trace of the measle itself is entirely lost. 

 Each cysticercus had become, as it were, resolved into a more or 

 less amorphous, solid, friable, crystalline particle, whose true 

 characters (as presented to the naked eye) were obscured by a 

 closely investing and remarkably contracted cyst, the external 

 surface of the latter becoming insensibly blended with the ordi- 

 nary intermuscular connective tissue. By a little care, however, the 

 calcareous particles could be perfectly isolated from their cysts. 

 They were numerous and, owing to the deeper colour of the mus- 

 cular substance, most easily found in the diaphragm. In other 

 muscles they were, perhaps, equally abundant, but it was a great 

 labour to find them. Assuming them to have been pretty equably 



