570 T^NIA MARGINATA AXD CYSTICERCUS TENUICOLLIS. 



great numbers along with the blood. Unfortunately we still lack a 

 detailed description of these young bladder-worms. Not that there is 

 any doubt regarding their nature, for Leisering expressly mentions 

 that closer investigation showed them to be Cysticerci ; we have only 

 to regret the absence of fuller and more exact statements regarding 

 their size and structure. 



In Leisering's case the lamb soon perished in consequence of the 

 feeding, and before the disease had led to inflammation. But that 

 the latter sometimes ensues is shown by the report of Kiichenmeister, 1 

 who made his first feeding experiments with Tcenia marginata, and 

 always lost his animals with violent symptoms of peritonitis. 



I observed a very similar result in the case of a young pig, which 

 was procured from the country for helminthological experiment, but 

 which became infected spontaneously, probably while being brought 

 into the town. The animal began to ail in little less than two weeks, 

 and died some days later. On a dissection being made, the cause of 

 death was found to be a violent perihepatitis. The surfaces of the 

 liver, and especially the concave one, were covered with a thick white 

 deposit, in and under which at least 100 small specimens of Cysticercus 

 tenuicollis, with newly formed heads (6-8 mm. in diameter), were 

 embedded. Some were also found free in the body cavity, and others 

 were encapsuled in the omentum and in the lower parts of the lungs, 

 in which places they had always produced an inflamed circle of about 

 1*5 cm. in diameter. The intestines, which were matted together into 

 a coil, were strongly injected, and, like the liver, covered in many 

 places with a spotted layer of exudation. 



In consequence of this experience, my animals were fed with only 

 a few proglottides, and it is owing to this circumstance that I have 

 never observed in them any symptoms of unhealthiness. On the 

 other hand, of course I found only a small number of Cysticerci, never 

 more than eight, and on one occasion only two. 



The latter were found in the first animal experimented on, namely, 

 a young pig, which was killed twenty-three days after the feeding. 

 Even on cursory inspection, I saw here and there on the liver a 

 number of white streaks which generally issued directly from the 

 interior, and then sometimes ran for a time below the surface. Most 

 of these streaks were empty, but in spite of their considerable size, I 

 was able to, recognise them as worm-passages from the analogy which 

 they presented to similar structures found in the liver of the rabbit 

 after feeding with Tcenia serrata. Only in two of them there lay 

 enclosed within an egg-shaped distended space a clear transparent 



1 Loc. ciL, p. 338. 



