458 



Mr. II. A. Baylis on a 



form ; I may mention, for example, those of Stultlmannia *, 

 of Polytoreutus kenyaensis and magilensis f, Pheretima J, 

 and more especially Pareudrilus §. 



The spermatheca (figs. 3 & 4) of D. jaculatrix consists, as 

 is usually the case, of a thick-walled muscular duct (/).), a 

 middle chamber (-/) with walls of medium thickness, and 

 a large blind terminal chamber [2] with comparatively thin 

 and little-folded walls. The walls of tl e middle chamber 

 are thrown into numerous deep folds and pockets, and the 

 whole organ, including the terminal pouch and the duct 



Fi«r. 5. 



Dichogaster jaculatrix. Portions of the epithelium from the inside of 

 the spermatheca : a. from the terminal sac : b, from the micldie 

 chamber. (Cam., oil-imm. T v", oc. 2 Zeiss.) 



itself, is lined with an epithelium consisting of tall goblet- 

 shaped glandular cells, which appear to have been in a 

 state of somewhat active secretion. 



There are certain differences in the form of these cells 

 in different parts of tlse organ, probably corresponding to 

 differences in function The cells lining the terminal 

 chamber (fig*. 5, «) are tall, but not very narrow, and each has 

 a long goblet-like cavity filled with granular secreted matter. 

 The actual distal end of the cell appears to be capped by a 

 thick membrane pierced with perforations. The large nucleus 



* See Beddard, P. Z. S. 1901, i. p. 344, and text-fig. 86. 



t Id. P. Z. S. 1902, ii. p. 200, and text-figs. 52-54. 



X Id, P. Z. S. 1911, p. 412. § Id, P. Z. S. 1903, i. p. 219. 



