CHROMODORIS ZEBRA HEILPRIN 



635 



and about 5 mm. long. A little beyond the ampullar enlargement 

 the duct bifurcates, giving rise to the vas deferens {va.dj.) and the 

 oviduct (o'dt.). 



The anterior genital mass 



The anterior genital mass is made up of male and female geni- 

 talia. The male genital apparatus is fairly simple. It consists 

 of a coiled tube, the vas deferens, which extends from the bifur- 

 cation of the hermaphroditic duct to the enlargement known as 

 the penis sheath (ivlr.pe.). From the point of bifurcation it 



muc. 



va. df.-\- 



^,ivlr. pe~ 

 y dt. ^l. muc. 



-dtr. ^en. 



aib77i 



S^'tkc. 



Fig. 6 Diagram of the reproductive glands and ducts, amp., ampulla; atr. gen., 

 genital atrium; dt.gl.muc, duct of mucous g[and;dt. her., duct of hermaphroditic 

 gland; gl.albm. albumen gland; gl.muc, mucous gland; o'dt., oviduct; ivlr.pe., 

 penis sheath; sp'cys., spermatocyst; sp'thc., spermatotheca; va.df., vas deferens; 

 vg., vagina. 



gradually enlarges, the enlarged portion being thrown into numer- 

 ous folds, which lie on the anterior mucous-gland portion of the 

 mass. The terminal portion, perhaps a third of the length of the 

 whole, is again narrowed and is very sinuous; it only gradually 



