316 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



deferens is greatly convoluted. The vagina is a nearh 

 straight tube running transversely across the proglottis, 

 near the posterior margin. The ovary is confined also to. 

 this posterior part of the segment, and consists of two 

 lateral lobulated masses. The uterus appears to be a 

 greatly convoluted tube, but the walls of this where in 

 contact with each other appear to have broken down so 

 that the organ is a large sac, occupying the middle of the 

 proglottis. In the ripest segments the uterus, densely 

 packed with eggs, occupies almost the whole volume of 

 the proglottis, and only traces of the other organs can be 

 seen at its periphery. 



The testes are situated on either side of the uterus as 

 two irregular bands. Immediately external to the testes 

 are the vitellaria, which consist of small densely packed 

 glands. 



The anatomy of the proglottides in the specimens 

 described here corresponds fairly well with that of A. 

 auriculatum. The identification of my specimens with 

 this cestode is, however rendered rather doubtful by 

 some characters in the scolex. Anthobothrium appears to 

 possess bothria which are unilocular, that is, are 

 undivided by internal septa. But in the specimen figured 

 here there are certainly two transverse septa, not, how- 

 ever, very conspicuous, and these cross each bothrium, 

 dividing the cavity of the latter into three. This appears 

 to be a character which hardly warrants the identification 

 with the genus Anthobothrium. These cestodes are, 

 however, so very mobile in life, that one must suppose 

 that the exact shape of the scolex after death and pre- 

 servation is due to the nature of the contraction, and that 

 the precise form assumed may be very variable. 



