128 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



walls of the duct and that of the cyst. They were easily 

 ruptured when they were removed. One cyst dissected by 

 Mr. Scott contained 13 large and 3 small worms. 



Fig. 1, PL II, represents a section through one of the 

 smaller cysts which had been dissected out. This cyst, and 

 another one examined in section, contained two worms, and 

 the heads of these worms are shown in the figure. The 

 bodies of the worms are coiled round each in a way suggested 

 by the figure, so that it is difficult to trace one individual 

 through the series of sections, but one can be certain that 

 only two worms are contained in the cyst. The integuments 

 of the two individuals, and even that of different coils of the 

 same individual, are applied to each other very closely, so 

 that examination of the section under a high magnification 

 fails to resolve these apposed integuments. The two worms 

 cannot be separated from each other by dissection, and it 

 seems certain that, in some of these cysts there is an actual 

 organic fusion of the individual worms. Nevertheless it is 

 impossible to trace any connection of the two systems of 

 genital organs. 



The cyst has a distinct, thin wall of its own, which is very 

 easily ruptured on dissecting it out from the tissues of the host. 

 Here and there in the section there are spaces between the 

 coils, and these spaces are usually filled with eggs. It may 

 be that these eggs have issued from the female genital opening, 

 either naturally, or on the contraction of the cyst following 

 preservation and embedding, but it is more probable that 

 the uterus becomes ruptured in places and that the eggs thus 

 escape. 



The shaded parts in the figure represent those parts of 

 the tissues of the worm where the typical " parenchymatous " 

 tissue occurs. The small dark bodies are sections of either 

 the vitelline gland or the ovary : it is sometimes difficult to 

 be sure which when the position of the section is unknown. 



