upon the Siruëture and Oeconomy of Tania. 261 
Fig. 13. Shews the lateral alimentary canals of the Tania lata, 
which have no crofs canals, and the central veffels are of a ftar-like 
form, and extend only into a {mall part of each joint. 
Fig. 14. Is the tail-extremity of the Ten/a lata, which is defti- 
tute of any aperture*, 
Fig. 15. Is a Tenia from the Ox 1, having ofcula on each “es i 
of each joint. In this figure are reprefented the lateral canals as 
in the Tema lata; but the central veffels are formed by radiated 
canals, which iffue from a middle canal, running tranfverfely over 
each joint. 
Fig. 16. Shews ducts TEN from the lateral SEO eic 
terminate in little annular canals; in thefe canals I have feen fmall 
opake absint bodies: this is a portion of the laft-defcribed 
Fig. 17- "Tz GET. of the. ^ Fafcrols hepatica, found in 
the bile-duéts of Sheep: the upper extremity is terminated by a 
narrow neck, having an opening at its end; this opening is the 
mouth. At the root of the neck is fhewn a tubercle with a trian- 
gular cavity in it; this tubercle is partly for attaching the body 
in different fituations, and partly for the purpofes of genera- 
tion. 
Fig. 18. Shews a duét leading from the mouth into a convo- 
* I was favoured with the following account of a perfect Tenia lata, which is pre- 
ferved in Mr. Watfon’s mufeum. The account is tranfcribed from his catalogue. 
Mr. Tatifcheff, a Ruffian gentleman, had been long troubled with Tznie, and had 
fometimes voided portions of them, but was never perfectly free from them until he ap- 
plied to a noted woman in Switzerland, who gave him a medicine, with much parade 
and fecrecy, at bedtime, and the next morning he voided the above-mentioned worm, 
which he afterwards prefented to Mr. Watfon, 
+ Tenia ovina, Gmelin. Syft. Nat. Linn. 
S ou luted 
