~~ 
The adult organisation of Paragordius varius. 453 
impossible of explanation; I think it probable that the openings of 
this canal into the genital ducts are either artefacts, or produced by 
hernia during oviposition.) | 
CAMERANO (1897b) has very poorly understood the structure of 
the genital organs, he states: “L’apparato riproduttore femminile 
consta di due lunghi ovarii con due lunghi ed ampi ovidotti.” 
Thus the literature shows great divergence of opinion in the 
interpretation of these organs. VEJDOVSKY has given the most detailed 
descriptions, and laid the greatest stress upon the fact that the growth 
zones of the ova are segmental. He did not see that the germinal 
membrane is continuous around the ova when in the “Eiersäcke”, and 
did not recognize the great difference from the Annelida in the ova 
developing outside of the body cavity. VıtLLorT’s descriptions are 
similar in the main to those of von Linstrow, but neither recognized 
that the “graffes ovigeres” or “eibildende Drüsen” are segmentally 
arranged. My term “uterus” corresponds to VEJDOVSKY’s “Eibehälter”, 
to VırLor’s “dorsal paired branch of the ovary”, and to von Lin- 
stow’s “Eiersack”. My term ovary, as used in the restricted sense, 
is equivalent to VEJDOvVSKŸ’s “Ovarien” together with the “Eiersäcke” 
(assuming the latter to be composed of a series of closed sacks), and 
to VıLLorT’s “graffes ovigeres” together with his “lateral paired 
branches”. As the idea “ovary” should be employed in the broad 
sense, I agree with VırLor: “L’ovaire des Gordiens comprend à la 
fois ce que VEJDOVSKY désigne, sous le nom d’ovaires et du ré- 
ceptacle des œufs (Eibehälter).” 
XI. The Male Genital Organs. 
These consist of the paired testes, the paired vasa deferentia, 
and the unpaired cloaca. 
The testes. These (Tes Figs. 80, 81, 83, Pl. 42; Figs. 84, 88, 
90, Pl. 43) extend continuously through the greater part of the trunk, 
beginning anteriorly a short distance behind the cephalic ganglion, 
where they are narrowest (Fig. 90). They are cylindrical, non- 
segmented sacks, without lateral diverticula, each lined throughout its 
length by a thin epithelium (Fig. 83) with much flattened and sparsely 
distributed nuclei. Externally each is immediately invested by large- 
celled parenchym (Par). In one individual the two testes did not 
extend forwards for the same distance. These sacks in the free stage 
of the worm contain spermatozoa, which may entirely fill the lumen; 
