164 DR. F. E. BEDDARD ON 



viewed in transverse section. But the break in the tissues 

 beneath the cuticle was not in my sections coextensive with the 

 area of this pore. 



In such sections the area of the body upon which the pores lie 

 does not appear to be raised above the general surface of the body. 

 But in the large terminal orifice of the uterus which I have 

 depicted in text-fig. 35, the uterine pore is clearly borne upon 

 the summit of an elevation. I have already pointed ovit that 

 this orifice is circular in ovitline, and it may be added that the 

 underlying soft tissues correspond to this, the discontinuity 

 corresponding with that of the cuticle I have just mentioned ; and 

 there is here an apparent contradiction- — that in my transverse 

 sections there is no such correspondence between the areas of the 

 cuticular pores and the narrow canals leading thereto from 

 the uterus. This apparent contradiction will be reconciled by 

 a consideration of text-fig. 36, which represents an older pro- 

 glottid than that illustrated in text-fig. 35. It is considerably 

 longer in proportion to its breadth, and the coils of the vas 

 deferens gorged with sperm are plainly visible, which is not the 

 case in the shorter proglottid. Furthermore, the ovary has 

 gained greatly in bulk, as will be noticed in a comparison of the 

 two figures. Difierences in the structure of the uterus I shall 

 refer to later. 



It will be observed that the external uterine pores are quite 

 obvious on this superficial view, but that the orifices are not 

 always circular as has been described in the younger proglottid. 

 The preparation from which text-fig. 36 was di-awn consisted 

 of three proglottids. In all of them there was an uterine pore 

 coinciding with the anterior termination of the utervis. The pore 

 was not circular but of an elongated oval form, and other slit-like 

 forms were observed behind this point. It follows, therefore, 

 that in transverse sections a given pore will occupy a considerable 

 number of individual sections of the series. As to the structure 

 of the uterus itself, it will be seen that the lateral diverticula 

 have grown in length as compared with the younger stage. They 

 are apt to be irregular in position, not being always symmetrically 

 paired ; indeed, the diverticula are sometimes lacking for a con- 

 siderable distance on one side of the median stem. The stalked 

 glandular cells covering the diverticula agree with those of 

 Ophidotoenia naice. 



IcMhyotaBnia sp. ? 



Of this species a number of examples were obtained from 

 the Mocassin Water Viper (Ancistrodo7i piscivorus). The living 

 worms reached 14 inches in length and they measured 8 to 10 

 inches when in spirit. The unarmed suckers were quite mobile 

 and independent of each other. The neck region can contract 

 and move like the whole body. The scolex is large and measures 

 in the contracted state 2 mm. in width or even rather moi-e. 



