ON PARASITES. ^3 



ones, a chitirious epidermis, longitudinal and transverse muscular 

 fibres, the uterus and its appendages, with the ova and the male 

 apparatus. 



The scolex of the taenia solium and the cysticercus cellulosse are 

 identical. This is apparent from the similarity in anatomical struc- 

 ture and from experiment. It has now been determined beyond con- 

 troversy that by feeding the hog, rabbit and sheep with the eggs of 

 the taenia solium those animals became infested with the cysticercus 

 cellulosse, and by feeding the dog and man with those cystic worms, 

 tape worms were produced in their intestines. The abundance of 

 cysticerci in the hog is well known. Statistics abundantly prove the 

 frequent occurrence of tape worm in butchers who are accustomed to 

 handle raw meat and are not over careful or cleanly, but often by 

 their hands or knives rubbed in their mouths introduce the cystic 

 worms into their system. It is also common among those who eat in 

 any manner raw or imperfectly cooked meat contaminated with the 

 cysticerci. The Hottentots in the Caffir wars demonstrated the mode 

 of translation of the cystic worms into the suitable nidus for the 

 final stage of development, namely, the intestine. Those people 

 in the invasion of the enemy's territory feasted according to their 

 barbarous fashion upon the cattle and sheep that were captured, 

 and became greatly infested with tape worm, whilst previously they 

 were mostly exempt. 



The cysticerci occur most abundantly in the muscles of the 

 hog, giving the meat, it will be recollected, the common name of 

 measly. They are found frequently in man. Five cases are certainly 

 known of the occurrence of this creature in the anterior chamber of 

 the eye floating free. It has been found in the eyelids, in the orbit » 

 under the sclerotic conjunctiva, in the vitreous humour, and in the 

 retina. It has been found in the brain, muscles, cellular tissue, 

 &c. When seated in the subcutaneous cellular tissue it is harmless, 

 in the muscles also it usually causes no inconvenience. In the eye 

 the pathological conditions induced are of more importance. 



The Tsenia medio-canellata of Kuchenmeister is not sufficiently 

 well known to deserve a detailed description. Of its existence he is 

 positive, and he gives some facts connected with its habits. Its scolex 

 is unknown. 



The cysticercus visceralis or tumicellis occurring occasionally in the 

 abdominal cavity of the human subject, is remarkable for its enor- 



