70 



FEEDING WITH CCENURUS CEREBRALIS. 



First experiment. On the 29th of May, a young dog was made 

 to swallow a cyst with nearly a hundred scolices. He was killed 

 on the 3d of June, that is, five days afterwards, and sixty-five 

 free and everted scolices were found in the small intestines. 

 Their length was from half a line to one and three quarters ; 

 they showed no trace of joints or transverse folds, and each 

 exhibited on the posterior end of the body a small kind of 

 cicatrix-like indentation, which plainly denoted the spot where the 

 scolex had separated from the parental vesicle. (Fig. 34, A, B.) 

 Second experiment. On the 6th of June, a young dog 

 swallowed a large Ccenurus- vesicle, which was covered with 



several clusters of scolices. When, 

 on the 26th July, the dog's small 

 intestine was examined, it afforded 

 an enormous number of tape- 

 worms ; I counted six hundred and 

 forty individuals in the most vari- 

 ous stages of development and 

 growth. The longest, with its 

 many joints, measured twenty- three 

 inches ; the shortest, having a length 

 of two lines, were still un jointed, 

 and yet perfectly resembled scolices. 

 In all, the scar on the last joint, 

 or on the unjointed posterior end 

 of the body was not to be mistaken. 

 (Fig. 34 and 35*.) 



Third experiment. On the 28th July a young terrier was 

 fed with part of a large Ccenurus, and was killed on the 5th 

 August, after a lapse of thirty- eight days. In his intestine 

 there were seventy-one tape-worms variously developed. Three 

 of the least developed individuals were from one and a half to 

 two lines long, and appeared to resemble a scolex most com- 

 pletely, their smooth posterior end being devoid of joints; 



Fig. 34. Different tseniae developed in the intestine of the dog, from the scolices of 

 Ccenurus cerebralis. A. A scolex one inch and three quarters long, with smooth and 

 protruded body, viewed from the edge. B. The same scolex seen from the surface. 



C. A scolex three lines long; the articulation is beginning at the lower extremity. 



D. A still longer and more developed scolex, at whose binder extremity the formation of 

 proglottides has taken place to a great extent. * Scar, or place by which these tcenice 

 were fixed as scolices to the parental vesicle. 



