70 ANIMAL PAEASITES. 



(daughter, or granddaughter vesicle), as was supposed by Von 

 Siebold and Delle Chiaje. 



From these considerations we cannot regard Echinococcus as a 

 many-headed Cysticercm, like the Coenuri, especially as we can 

 never press out the Echinococcus-scolex from the true embryonal 

 vesicle by the application of pressure to the vesicle from without, 

 so that the scolex may afterwards bear about the remains of the 

 embryonal vesicle behind it as an appendage. It is only when 

 we have cut up the mother-vesicle, that a similar appearance is 

 presented to us on examining it from the inside. We find the 

 individual scolex on the brood-vesicle of the scolices, bearing 

 behind it the remains of the embryonal vesicle on a peduncle. 



The formation of the hooks, suckers, and vessels takes place 

 here in the same way as in the other Cestoidea. The thick, 

 opalescent, epidermic walls present particular difficulties in the 

 detection of the vascular system in general, and especially 

 that of the daughter- vesicles. 



As we have shown in the historical portion, the statements 

 here made have been established by the most multifarious experi- 

 ments. I will not go over this subject at length, and can only 

 again remind the reader that the cheapest and quickest means of 

 convincing himself of the truth of what has been said consists in 

 the administration of Taenia serrata vera to rabbits. 1 



1 On account of the general interest possessed by progress of the experiments, I shall 

 here refer particularly to some experiments in the administration of T. ccenurus to 

 lambs, sheep, &c. After I had informed the Saxon Ministry of the Interior of the 

 above-mentioned results of my first experiments (vide supra}, with the request that they 

 should allow these experiments, which come rather dear to the private medical man, to 

 be repeated at the cost of the state, and on a larger scale, experiments were made, in the 

 year 1854, at the veterinary school at Dresden, under the direction of Professor 

 Haubner, by that gentleman and myself. On the 6th January, 1854, I had at last 

 obtained mature T. ccenurus, and administered them to two lambs in Drausendorf, 

 which had been purchased at. the expense of the government. On the 7th January I 

 carried T. ccenurus, protected from the cold, in my clothes to Dresden, and with 

 these four other lambs were fed in the veterinary school in the presence of the collected 

 students. On the 19th January, five of these six animals were affected with appear- 

 ances of irritation and inflammation of the brain, and cerebral convulsions. According 

 to Professor Haubner, who was able to watch the animals in his establishment, the 

 heads, the base of the horns, the eyes, and the visible mucous membranes of the cephalic 

 region were heated, and the latter reddened; the beatings of the pulse and heart were 

 excited and increased (to 130 135 strokes in a minute) ; the temperature of the body 

 was varying and unequal, and the evacuations were diminished. Dullness, stupefaction, 

 loss of appetite, and, to a certain extent, a neglect of rumination, were also observed, 



