452 FRANK E. BEDDARD. 
taculum which appears to have no celomic aperture. On the 
other hand, it seems improbable that the ova from the ovary of 
segment x111 pass down into the spermathecal duct, and then 
pass up the oviduct into the supposed receptaculum. I am 
not able to state positively whether there are cilia in the ovi- 
duct of seginent x111, though I believe that there are not; but 
the spermathecal duct is certainly without cilia, as is also the 
distal half of the oviduct of segment xiv. The proximal half 
of this oviduct is abundantly furnished with long cilia; but, if 
the movement of the cilia is such as to further the exit of ova 
from the ovary of the fourteenth segment, they would prevent 
the entrance of ova into the same organ; but even supposing 
that the cilia by occasional cessation of their movement offered 
but little obstacle to the entrance of ova into the ovary of seg- 
ment xiv, the passage of ova from the ovary of segment x111 
into this would necessitate very complicated changes in the 
direction of the peristaltic action of the various parts of the 
female reproductive system. 
But the force of any arguments that might be used to 
explain the passage of ova from the ovary of segment x111 to 
the supposed receptaculum of segment xiv, is greatly weakened 
by the fact that ova in all stages of growth occur in 
both these organs. 
Another difficulty in the way of supposing that the cellular 
mass with developing ova in segment xiv is really an ovary is 
its position. 
The ovaries of segment x11I correspond exactly in position 
with the testes, but not to the problematical organ in the 
fourteenth segment. The difference, however, even when 
most accentuated, is not a great one, and I should not have 
referred to it had it not been mentioned by Rosa; moreover, 
in some specimens the organ of the fourteenth segment 
appeared to correspond to that of the testes and ovaries. It 
must be remembered that (1) the ovary of segment xiv becomes 
very closely attached to the spermatheca, and (2) that the 
septum separating segments 13 and 14 is, in the region of the 
genital organs, largely deficient; the growth of the sperma- 
