150 Gr. A. and W. G. MacCallum, 



latious of the body whicli rise up all round it so as to lüde it 

 from view. 



At the extreme point there can be seeii an indefinite rounded 

 mass which sliows some muscle fibers and whicli is apparently the 

 representative of a mouth sucker or pharynx. No distinct opening 

 can be seen and no definite vestig-e of an Oesophagus or intestinal 

 tract can be traced away from it. Somewhat lower in the neck 

 there is a faint outline of a tube which bifurcates and which in 

 its turn may be the remnant of a digestive tract but no connections 

 could be shown. 



On the other band, the Uterus and vas deferens are extremely 

 prominent and open together at a point beside the muscular mass. 



The Uterus is thickwalled and muscular and somewhat coiled 

 even in the neck — it continues back into the root of the neck and 

 disappears into one of the lobes of a body where, becoming wider 

 and thinner walled it extends continuously through all the lobes to 

 its origin in a small isolated lobule situated rather near the neck 

 at the junction of the lobes. 



Throughout part of the lobulations, although apparently not all 

 of them, there runs the long tubulär ovary. Careful study has been 

 made to determine whether this tube branches into any of the lobes 

 or runs continuously as one tube. In one place near the entrance 

 into the uterus it seemed that it was joined by a brauch but this 

 is uncertain. Everywhere it has the appearance of being a Single 

 continuous tube. The same things are true of the narrow tubulär 

 vitellarium which takes Httle of the blue nuclear stain but has its 

 own brown color. This courses through many lobes but is probably 

 one continuous tube. It meets the ovary and gives rise to a Single 

 tube which after several convolutions during which it is thickly 

 surrounded bj^ the shell gland becomes the beginning of the uterus. 

 There is no evident receptaculum seminis. The shell gland forms 

 a relatively large mass ot radially arranged cells and from it the 

 Uterus runs back to enter one of the general lobes. The lobule in 

 which the shell gland lies and in which this junction of the various 

 canals occurs contains no other organs and is rather separated from 

 the rest although continuous with them at either end. Its skin is 

 very mucli corrugated. The uterus in its main portion is thin 

 walled and distended with huge numbers of eggs which are yellow 

 and lounded and measure 0,06 mm in diameter. 



The vas deferens which opens at the termination of the pointed 



