122 



on either side of the posterior part of the abdo- 

 men, and that when fully developed they occupy 

 the whole of the lateral and dorsal portions of 

 this. 



Drag off the last few segments of the ab- 

 domen in a drop of salt solution, and allow the 

 ovaries to float out in this. Observe that they are 

 pyriform bodies, the apex being above (Fig. 39). 



j'/i,i-h,«*'^ 



Fig. 39. Spermatheca, with Spermatozoa 

 Structure of Ovaries 



Ascertain that each ovary consists of a large 

 number of follicular tubes, commencing as fine 

 threads and ending in the oviduct. Observe 

 especially the follicular tube forming the apex of 

 the ovary, as here, this is most readily made out. 



Ascertain that each follicular tube contains 

 several egg follicles, the lowest of which is the 

 most advanced in development. 



