TYENIA MEDIOCANELLATA. 137 



Wundt (Taf. ii, figs. 19 and 20) as degenerated, hypertropic seg- 

 ments of T. solium, arranged one after the other in the manner 

 of a rosary. After the lapse of about ten weeks from the time 

 when one of these Tceniae has been expelled up to the neck, a 

 fresh passage of proglottides always takes place. From figs. 13 

 and 14 of Bremser's first plate also, but especially from the half 

 untwisted, fig. 14, it is clear Bremser, unknown to himself, had 

 a T&nia mediocanellata before him. 



Although the passage of proglottides without faeces occurs 

 sometimes, even with Tcenia solium, it is not the case to such an 

 extent, or so constantly, as in Taenia mediocanellata ; from which 

 we must conclude that its reproduction and growth is extra- 

 ordinarily rapid, and that the animal must even be more injurious 

 to its host than T. solium, as indeed is proved by experience. 

 The passage of the segments without faeces is a constant annoy- 

 ance to the patient. The proglottides adhering to the naked 

 body in the trowsers, or under the petticoats, being disagreeable, 

 from their clammy coldness, disturb the patients greatly; and 

 women especially are afraid lest the proglottides should fall un- 

 perceived upon the ground when they are walking or standing. 

 How really terrible the passage of these proglottides may be, 

 appears from the statements of one of my patients, who wrote 

 to me at the end of June as follows : " On the 6th of 

 April I observed the first passage of proglottides, and since then 

 they pass nearly every day, sometimes more, and sometimes 

 fewer. On the 24th of May, from the morning to evening, 21 

 passed spontaneously; on the 17th of June, seven within fifteen 

 minutes, and later on the same day two at once." If I reckon 

 20 proglottides daily, from the 6th of May to the 26th of June, 

 this gives in all 10 pieces, and if we calculate the proglottides 

 only at 1 inch long, which is very little, we get 83 feet 4 inches. 

 If we reckon only 15 proglottides daily from the 6th April to the 

 26th of June, when an expulsion takes place, this would give 

 80 x 15 = 1200 proglottides, or 1200 inches = 100 feet of tape- 

 worm passed in the course of 2 months, and we must calculate 

 that in the course of one day 1, foot of tape-worm had been 

 passed and regenerated. This is certainly an enormous quantity, 

 when only a single specimen was present, which, however, was 

 proved to be the case by the last successful expulsion. 



The troublesome tickling on the sphincter muscle from within, 

 when the segments forced their passage, and the clamminess on 



