496 



Cyst-affected Beef and Pork. 



[part III. 



part marked with an asterisk cannot be reflected, but remains firmly attached to 

 the coiled heap. The reason for this will soon become evident. 



The portion of the neck nearest the orifice is movable, and may be readily 

 drawn on one side by means of a little hook (Fig. 26), when the cavity in which the 



Fig. 26.— The " head " and " neck " pulled out of the " receptaculum " through the rent. Magnified about 5 times. 



worm has lodged will be brought well into view. By fixing a short hair into a 

 small needle-holder, and using it as a probe, it will be ascertained that the delicate 

 inner membrane just reflected is continuous with the neck of the worm at the end 

 furthest from the orifice, just as the mucous membrane of the mouth is continuous 

 with the skin of the lip, or that the finger of a glove is continuous with the hand- 

 portion when the latter is pulled over the former, so that the reason why, at the 

 corresponding end on the opposite side, the membrane could not be reflected becomes 

 evident at once. 



This arrangement becomes still more clear when the "head" and "neck" are 



Fig. 27. — .\s Fig. 26, with the " neck" everted and uncoiled. The head is still inverted. Magnified about 5 times. 



turned out and made to assume their destined appearance. This may be done by 

 slight pressure and gentle use of the hook as shown in the third woodcut. The 

 "neck" will then be turned inside out, and become uncoiled at the same time, 

 as eeen in Fig. 27, which represents the greater part of the neck thus exposed \ the 



