Dr. O'Biyen Bellingbam on Irish Entozoa. 321 



22. Tania stylosa .... Small intestine of magpie (Corvits Pica). 



B. Armat^. 



23. Tania solium * . . Small intestine of man (Homo). 



24. serrata .... Small intestine of dog (Canisfamiliaris). 



25. crassicoUis . Small intestine of cat (Fclis maniciilata). 



rt„ . r Small intestine of duck (Anas Boschas do- 



26. sinuosa . . . , < . >, 



[ mest.). 



27. injiataf . . Small intestine of bald-coot (Fulica atra). 



* The Tania solium, which inhabits the small intestines of the hu- 

 man subject, is longer known than anj' other species of Tcenia, and 

 has received several distinct names. Thus it is the Tcenia ciircvrbi- 

 tina of Pallas, the Tcenia vulgaris of Werner, the Tcenia solium and 

 Tcenia vulgaris of Pennant and Tuiton, the Tcenia armata umana of 

 Brera, Tcenia a long anneaux of Cuvier, and the Tcenia (mciirbitain of 

 Lamarck. It is peculiar to the human species, but occurs in the in- 

 testinal canal of the inabitants only of certain countries. Thus it is 

 the most common species in Great Britain and Ireland, Holland, 

 Germany, the East Indies, Egypt, and part of France ; while in 

 Switzerland, Poland and Russia it is rare, and is replaced by the 

 Bothriocephalus latus. 



The name solium, given to this s])ecies by liinnaeus, is not strictly 

 correct, as more than one is not unfrequently found in the same in- 

 dividual. It varies in length from 12 inches to 30 feet and upwards ; 

 the colour is white when the animal is alive, and its tissue is semi- 

 transparent, but it becomes opake after lying in spirits of wine. The 

 body varies much in breadth ; near the head it is very narrow, often 

 almost filiform ; posteriorly it is broad and flat ; its thickness varies 

 according as the animal is fully expanded or contracted. The arti- 

 culations near the head are very short, and appear to be merely 

 transverse rugse ; they increase gradually in length, become square, 

 and eventually much longer than broad. 



The head has a somewhat hemispherical shape, flattened anteriorly ; 

 the four oscula are orbicular and surround the rostellum, which is 

 short, retractile, and armed with a double row of minute recurved 

 hooks. 



The Tcenia solium inhabits only the small intestines of the human 

 subject, particularly the jejunum and ilium ; it is much more com- 

 mon in the adult than in early life, and is more frequently met with 

 in the female than in the male. 



t In the month of April 1838 I found a Tcenia in the small intes- 

 tine of the bald-coot {Fulica atra) which has the characters of the 

 Tcenia infiata, but I VvVis not able to see whether the rostellum was 

 armed. It is about an inch in length, colour white ; the head is 

 large, somewhat obovate ; the oscula prominent, round and large ; 

 the rostellum is clavate, the neck long ; the anterior articulations are 

 very short, and the terminal articulation is rounded and smaller than 

 those next it. 



