242 CLA YPOLE. [VoL. XIV. 
is clear that the cephalic elongation in Anurida is also of 
the same nature; it serves to keep the ovaries attached to the 
anterior body wall. Its relation, however, to the germinal 
epithelium is entirely different; it is entirely separate and not 
directly continuous, as in other cases. The position of the 
germinal epithelium in the third and fourth abdominal segments 
distinctly cuts it off from any direct connection with a strand 
that originates in the first abdominal segment, apparently as a 
simple continuation of the wall of the ovary, the cells of which 
the two are composed being closely similar (Figs. 4, 5, ov.). 
In Anurida as in Dytiscus, according to Korschelt (’86), the 
cell outlines become indistinct and are in some places lost, 
but particularly near the ovary the cells are arranged with 
almost a lumen in the centre as in a duct. 
The great discrepancies between the form of the ovary in 
Anurida and that shown by Blatta or any other typical insect 
led to a comparative study of the gross structure 
of as many forms of insect ovaries as could be 
reached in literature or otherwise. As regards 
typical forms, Lubbock ('59) says the number of 
egg tubes in insect ovaries varies from two to two 
hundred (queen bees). In no case could records be 
found where the number was less than two. Even 
in the ant workers, according to Bickford ('95), 
where the reproductive organs are practically abor- 
tive, the number varies from two to fifteen, while 
in the queen, the fertile female, there are forty- 
five ovarioles in each ovary. Starting among the 
Orthoptera it is found in the Blatta ovary that the 
average number of tubes is about twenty. They 
are arranged so as to open at very slight differences 
of level into oviducts, which in turn unite to form 
the common oviduct leading to the exterior. Fig. I 
in the text is copied from a plate given by Dufour 
(28). It represents the ovary of Labidura riparia, a forficulid. 
Here there are five ovarioles to each ovary. They are figured 
as opening into the oviduct at different levels, making it pos- 
sible to designate the ovariole as the first or fifth in a series. 
Fie. I. 
