/ 



652 F. P. LA[DI,AW. 



Bursa seminalis. Nuc. Eiuloderm nucleus. P. N. Nucleus of parencliyma. 

 Other lettering as in Fig. 1. 



Fig. 8. — Optical section through the bursa seminalis, receptaculum seminis, 

 and ovary of a specimen mounted whole. Ov. Ovum shovring the large 

 nucleus. S. Mass of spermatozoa in the receptaculum. Other lettering as 

 in Fig. 1. 



(The position of the '' mouth opening " is drawn ratlier too far back in 

 Fis. 1.) 



