SCOLEX OF TAENIA SOLIUM. 113 



uninjured proglottis. At its junction with the uterus, also, the 

 vagina forms a small funnel-shaped swelling. 



The uterus forms a tortuous median stem, into which open 

 numerous dendritic lateral branches placed opposite to each other, 

 and alternating irregularly. Their number is usually uneven, 

 9, 11, 13, 15, rarely as many as 20. 



As ovaries, including the organs for the formation of the germ, 

 vitellus, and egg-shells, we may perhaps indicate some small caeca, 

 which are only perceptible in semi-mature segments, and which 

 appear to have an outlet towards the median stem. 



Upon the formation of the embryos in the egg, I have no 

 direct observations, and I must refer to what Van Beneden has 

 stated with regard to other Cestoklea. 



The structure of the individual joints, when cut through, is as 

 follows, passing from the exterior to the middle. 



1 . Epidermis without calcareous corpuscles, consisting of a 

 chitinous mass. 



2. Longitudinal muscular fibres, with an abundance of calcareous 

 corpuscles. 



3. Transverse muscidar fibres, with a few calcareous corpuscles. 

 4- Uterus and its branches, with ova. 



I am acquainted with no secretory organs in the skin, although 

 Van Beneden thinks there is a secretion of a " mucus destine a 

 labrifier la surface clu coi'ps." In examining the skin, care must 

 be taken to avoid being deceived by the sarcode, which issues on 

 the contact of water. 



b. Scolex of Tcenia solium = Cysticercus cellulosce, its seat, the 

 mode of its transference, and production, and its nature. 



This scolex is the Cysticercus cellulosce of authors. This is 

 evident from the similarity of its head with that of Tcenia solium, 

 and the consideration of the general as well as the particular 

 circumstances under which T. solium occurs, and from the possi- 

 bility, by experiments in feeding, of converting Cysticercus 

 cellulosce into Tcenia solium, and the eggs of the latter into Cyst, 

 cellulosce (vide infra). 



Ordinary habitation of C. cellulosce. — The ordinary habitation 

 of this vesicular worm is, as is well known, the flesh of the pig, 

 and we find that Tcenia solium is almost entirely unknown where 

 the use of this flesh is avoided, as, for example, amongst those 



ii 



