CYSTICERCUS C X ELLULOS/E. 123 



impressions in the lining of the skull. Affections of the brain 

 during the immigration of the brood, and the growth of the Cysti- 

 cerci, were not observed, or were perhaps overlooked ; according to 

 the keeper's statements the animals were remarkably stupid. Ir- 

 regular forms caused by excrescences and constrictions, belong only 

 to the cyst and not to the worm. According to Leuckart, Cyst, cellu- 

 lose could not be reared in sheep and rabbits from eggs of T. solium. 

 An experiment made by Dr. Von Ammon and Professor 

 Haubner, in which incisions were made in the conjunctiva of 

 the eye of one of the pigs, and after eggs of Taenia solium had 

 been introduced into them, the eye was kept closed for some 

 time with strips of sticking plaster, unfortunately led to no 

 result. In my opinion, however, the embryos should have been 

 set free by crushing the eggs between two glass plates, and the 

 free and hooked young introduced into the eye ; but this experi- 

 ment was not tried, as the funds granted to the agricultural 

 section were exhausted, and the most interesting questions for 

 the agriculturalist were settled. In this way we now survey the 

 whole cycle of the development of T&nia solium and Cysticercus 

 celluloses, and we at the same time see, by accurate microscopic 

 examination, that the development of these Cysticerci, takes place 

 in exactly the same manner as we have described in the general 

 part of this work, for which reason we shall forbear from dwelling 

 further upon it here. Unfortunately hitherto the six embryonal 

 booklets have entirely escaped us, and we do not know whether 

 they are taken up by the surrounding exudation which is fur- 

 nished by the host, and becomes converted into cellular tissue, 

 and thus imbedded in the walls of the newly formed enveloping 

 cyst, or whether they remain attached to the animal itself and to 

 its caudal vesicle. Nor do we know how this is with the Cysti- 

 cerci, which occur m closed cavities (in the eye and brain), whether 

 in these cases the booklets fall to the bottom of the cavities which 

 replace the cysts, or whether they remain adherent to the so-called 

 caudal vesicle. Nay ; we do not even know whether six-hooked 

 embryos occur freely in water, and whether, which is very pro- 

 bable, they do not then easily lose their booklets and become 

 unfit for migration. Only this is certain, that the acts of immi- 

 gration are accompanied by irritation and inflammation of the 

 organs selected for passage, and that we do not possess any ac- 

 tive remedy for the destruction of the embryos at the moment 

 of immigration. That the greatest cleanliness be observed in the 



