54 PROCEEDINGS OF THE ACADEMY OF 



T. solium. From a, want of acquaintance with the former, I did 

 not feel entirely satisfied that the si^eciraen actually belonged to 

 that species. 



Subsequently, my friend brought to me the anterior part of the 

 bod}^, probably, of the same individual tapeworm. He observed 

 that his patient continuing to complain, he had administered 

 another dose of the male-fern, which was followed by the expul- 

 sion of the portion of the worm now presented. The head of 

 the parasite was included, and it confirmed the view that it per- 

 tained to the Tsenia mediocancUata. 



The case serves as another caution against the use of raw flesh 

 as food. 



The description of the worm, as derived from the specimen, is 

 as follows: — 



The head is white, without pigment-granules, obtusely rounded, 

 unarmed with hooks, and unprovided with a rostellum, but fur- 

 nished with a minute acetabuliform fovea at the summit. The 

 four acetabula are spherical, and opaque white. The diameter of 

 the head is three-fourths of a line. The neck, or uusegmented 

 portion of the bod}' immediately succeeding the head, is about 4 

 lines long by half a line in breadth. The most anterior indis- 

 tinctlj'^ defined segments of the body, and those immediately suc- 

 ceeding them, but more distinctly separated, are about one-fifth 

 of a line long by two-fifths of a line broad. In a more posterior 

 fragment of the body, the flat and nearly square segments mea- 

 sure half a line long and 1 line broad, to one-third line long and 

 2|- lines broad. A succeeding fragment exhibits segments 3^ lines 

 long by 4 lines broad, and 2 lines long b}'' 5 lines broad. Many 

 of the segments in this piece are irregularly separated, lateral]}', 

 b}^ deep, wide notches. In a succeeding long portion of the 

 worm, the segments are wider behind than in front, and measure 

 2, 5, and 3 lines long by 5 lines broad. In a long piece of the 

 posterior part of the worm, the segments are first 4 lines long and 

 broad ; and in the last four feet of the same piece, the segments 

 are clavate in outline, from G to 10 lines long, and 2 and 3 lines 

 broad. 



The genital apertures are conspicuous, and are situated behind 

 the middle of the segments. They alternate irregularl3% Thus, 

 in the last two feet of the posterior fragment of the worm, the 

 first two segments exhibit the aperture on the left margin ; the 

 succeeding segment presents the anomaly of an aperture on both 

 margins ; then follow three apertures on the right, next two on 

 the left, then four on the right, then eight alternating in pairs, 

 then one on the left, and so on. The ovaries are opaque white, 

 and exhibit numerous closely crowded lateral branches. 



In the absence of pigment-granules to the head, and in the less 

 robust character of the worm, the specimen differs from J", ?/lef/^o- 

 canellata as described by Kiichenmeister. The minute acetabular 



[May 9, 



