456 



Mr. Ti. A. Baylis on a 



into two chambers, of which the inner, blind, chamber 

 (tigs. 3 & 4, 2) is the larger, and has comparatively thin and 

 little-folded walls. Near the commencement of the duct 

 there are visible, on the outside of the anterior and outer 



Fie:. 3. 



Flo-. 4. 



Fig. 3. — Dichogaster jaculatrLv. The right spermatheca of the posterior 

 pair, viewed from the right side. D., the muscular duel: 

 Div., sperm-containing diverticula ; 1, middle chamber ; :.', ter- 

 minal sac. 



Fig. 4. — Ditto. View of the inside of cne-half of a spermatheca, which 

 has been longitudinally divided. The spermatophores, complete 

 and in process of formation, have been removed. D., the 

 muscular duct; Div., sperm-containing diverticula; 1, middle 

 chamber in which the upper capsule of the completed spermato- 

 phore lay ; 2, terminal blind sac. 



wall of the spermatheca, from one to three small sessile 

 diverticula (figs. 3 & 4, Div.), which are found to contain 

 sperm. 



