30 



E. NOMURA 



The outer layer is the direct continuation of that of the funnel 

 and is of the same structure. 



After running backwards a short way on either side of the 

 ventral nerve cord and increasing gradually in calibre, the vas 

 deferens passes over into a longer and more spacious atrium (fig. 



int 

 S.1X/X 



> — te 



sptli 



SXI/XII 



n.c rap 



Fig. 25. 

 Horizontal section of segments X and XI, showing the position of the genital organs. 

 x 150. Cœlomic corpuscles are not shown, int — intestine, S.IX X, XI XU — septa IX X, 

 XI/XII, te — testis, spth — saccular portion of spermatheca, v.v — ventral vessel, t. sp — 

 tails of spermatozoa, h. sp — heads of spermatozoa, f — sperm-duct funnel, ov — ovaries, at 

 —atrium, tb— transversal bridge, nip— male pore, n.c — ventral nerve cord, ph — posterior 

 portion of the lateral horn of spermiducal chamber, n — nephridia. 



