902 J- Stafford, 



end rounded and the anterior end abriiptly narrowed. It is flatteued 

 from above downwards, biit is tolerably thick. A sagittal section 

 tliroiigh the long axis of one specimen sliowing mouth, ventral siicker, 

 ovary and receptaculum seminis measured 6*74 mm in length and 

 ]-42 mm in depth; and a transverse section cutting ovary, recepta- 

 culum and ventral sucker of another measured 2'55 mm in breadtli 

 and 1-39 mm in depth. The ventral sucker in the flrst case was 

 2-6 mm from the anterior end and measured 2 mm in length and 

 •06 mm in depth — a little shallow concavity on the mid-ventral line, 

 its walls being hardly thicker than the integument of the region. 

 The mouth-sucker was a strong muscular organ -46 mm in length 

 and depth. In the cross section the ventral sucker was "23 mm 

 across and -12 mm in depth while the mouth-sucker was "38 mm in 

 depth and '49 mm in breadth. 



The cuticle of this species is thick and perfectly smooth, there 

 being no trace of spines, in either the fresh worm or in preserved 

 sections. 



The ovary is pretty compact, although it is often longer in one 

 direction than the other, and in large animals frequently with 

 Short, blunt, rounded lobes along one side. Its position is above the 

 ventral sucker from which it is separated by the receptaculum 

 seminis. It is close under the dorsal skin, which it presses up into 

 a prominent elevation of that region, especially noticeable in preserved 

 animals. Frequently, its long axis lies across the body, but not 

 always, and it often lies slightly to one side or the other, following 

 no regulär rule, but with the lobed side outwards. In those worms 

 that have been subjected to pressure it is oftenest a little more 

 posterior than the position mentioned. Immediately behind the 

 ovary are the shell-gland and ootype — all three overlying the large 

 receptaculum seminis which fills the space between the intestinal 

 caeca of this region. 



The testes are two long, narrow but deep bodies lying parallel 

 to one another and each between an intestinal caecum and the 

 median portions of the Uterus ; when one is slightly in advance of 

 the other, it is generally on the opposite side from the ovary. 



Two vitellaria extend from about half way between the suckers 

 to the posterior end of the body and consist of about ten bunches 

 of follicles on each side, but the number appears to be subject to 

 Variation as well as their arrangement. Frequently one or two 

 bunches of each side are moved towards the middle. dorsal line and 



