APPEARANCE OF THE INFECTED FLESH. 



465 



tongue, and was therefore easily accessible, exhibited hardly any note- 

 worthy change. 



The appearance of the muscle three months after feeding was 

 exceedingly like that of measly pork. Oblong vesicles, with large 

 nuclei, were to be seen in great numbers, especially in the anterior 

 half of the trunk between the muscle-fibres (Fig. 267). Their length 

 varied from 4 to 8 mm., while their breadth was somewhat uniformly 

 3 mm. The head-rudiment had very considerably increased in size, 

 and formed a rounded appendage 1 to 1*3 mm. long by 07 to O9 mm. 

 broad. The organization of the head was, however, still unaltered. 

 Instead of a rostellum armed with hooks, the previous structure was 

 still present, except that the points had now disappeared on most of 

 the specimens. The neck not only contained a large number of 

 calcareous bodies, but was also much longer than before, and had con- 

 tracted into numerous close folds within the receptacle (Fig. 268). At 

 first very small when compared with the head, it now appeared as by 

 far the most conspicuous portion of the whole mass. The head was 

 confined to the lower end, and was not unfrequently much contracted 

 longitudinally, and displaced to one side, exhibiting many irregularities 

 in form and position. 



,!!!,, 



FIG. 267. Cysticercus 

 Tcenice saginatce, em- 

 bedded in the muscle 

 (nat. size). 



FIG. 268. Head-rudi- 

 ment of an adult Cysti- 

 ccrcus. ( x 12.) 



FIG. 269. Cysticercus 

 with evaginated head. 

 (x3.) 



The structure of the parasite becomes most evident when a 

 longitudinal section is taken through the head, or when it is protruded 

 by intentional pressure. In the latter case one notices at once a 

 wrinkled appendage about 3 or 4 mm. long, which has a somewhat 

 opaque appearance, due to the thickness of its walls and the abundance 

 of its calcareous corpuscles, and which runs forwards to the head and 

 the suckers. The latter organs have not yet attained their full size, 

 since they measure at most O35 to 0'4 mm., but they are markedly 

 larger than the suckers of Cysticercus cellulosce of the same age. On 

 the apex the head bears an opening about O14 mm. in diameter, 

 which leads into the cavity already mentioned, and, with the rostellum 

 just beneath, is to be regarded as a sort of frontal sucker, such as we 



2G 



