92 Maddox, on Parasites of the Common Haddock. 
downwards, they are distinctly nucleated (like the biliary 
tubes of some insects), as figured, and at the lower parts 
join and apparently end by one tube posteriorly, but whether 
in a blind extremity or in conjunction with the large 
sac, I will not assert, though disposed to believe the latter. 
Are these tubes a portion of the digestive canal, or hereafter 
to become ovaries ? At the centre of the upper part of the 
middle third is a second disc, which on tracing inwards 
appears to have an aperture with a short tortuous canal, or an 
oblique passage, that terminates in a strong pouch, regarded 
as the uterus, which generally contains several large globules 
and some very minute ; its walls are rugose, thick, cellular 
when seen on end, and have both circular (which are very 
marked) and elongated fibres in its walls. On a side view it 
often appears divided by these into little square areas. I 
could not find any satisfactory connection of the sacculated 
end of this organ with any other, nor indeed of its mouth or 
neck. The walls of the disc have circular and radiating folds 
or fibres, the radiating in some cases very distinct, vide 
%• 4 - 
Mr. Goodsir described and figured a small anterior pore in 
front of the acetabulum. May this pore not be the mouth of 
an erected short tube, which, when drawn back into the neck 
of the sac would give the appearance corresponding to Mr. 
Goodsir’s description, but in other dispositions of the parts, 
to a small orifice beneath the disc. I could not satisfy myself 
on these points, though am inclined to view it as now stated 
(fig. 8 ). 
Slightly below this organ and to one side are seen, in large 
specimens, five other bodies, two small, two large, and one 
intermediate, but more resembling the former ; they appear 
to me as connected. The intermediate one is circular, some- 
what different in aspect from the others, and contains highly 
refracting bodies ; the next smaller in size is a cell with a 
segmented arrangement of about five nucleated structures. 
I could not trace in any specimens the exact attachment of 
this organ to the lowest of the sixteen nucleated cells before 
described, but think such exists ; below this, the next small 
circular body is more solid, the divisions are broken up into 
a greater number, and evidently some change appears to have 
been effected in it ; — beneath this are two much larger and 
more compact oval or roundish bodies, very distinct, the 
upper one generally the larger of the two : they are con- 
nected together by bands, whether ducts or not I could not 
determine. Speaking of these bodies, Mr. Goodsir writes, 
“ The two larger globular masses are very constant, and as 
