EEPEODUCTIVE SYSTEM 169 



in the upper part of the tube are in various 

 earlier stages of development. 



At the time of laying, one ovum escapes from 

 each ovarian tube, and the sixteen are laid side 

 by side in a capsule. 



b. The oviducts, formed as above, are a pair of short 

 wide tubes, which unite, and open to the exterior 

 by a median vertical slit in the eighth sternum. 



<5. The spermatheca consists of two unlike and unequal 

 casca of small size, opening by a median aperture 

 on the ninth sternum. It lies close behind the 

 last nerve ganglia of the ventral chain. 



•d. The colleterial glands are a pair of much-branched 

 tubular glands, whose ducts open separately, but 

 close together, behind the spermatheca, and be- 

 tween the inner gonapophyses. 



■e. The gonapophyses are six symmetrically arranged 

 processes, strongly chitinised on their outer sur- 

 faces. They are outgrowths of the sternal sur- 

 face, between the vulva and the anus ; and aid in 

 depositing the eggs. 



