Male reproductive system
The male reproductive system consists of a pair of testes, a pair of vasa deferentia, a pair of genital chambers, a pair of paraxial organs, a pair of flagella, a pair of seminal vesicles, a common genital atrium and a gonopore.Each testis consists of a pair of longitudinal tubules placed in the pre-abdomen, and connected by transverse tubes.The two longitudinal tubules of each testis unite anteriorly to form a vas deferens, which runs forward and downwards.The terminal portion of each vas deferens opens into the inner side of the genital chamber along with an enlarged seminal vesicle. The genital chambers are muscular tubes and bear the paraxial organ having a chitinoid flagellum. It also receives the accessory gland. The genital chambers unite to form a median genital atrium, which opens to the exterior by the gonopore situated just behind the operculum.
Female reproductive system
The female reproductive system consist of a single ovary, two oviducts, a median genital chamber and a gonopore. Ovary is situated in the preabdomen. It consists of three longitudinal tubules connected by cross branches. The median tubule is shorter than the other two.The ovarian tubules and the cross branches bear numerous diverticula. 3. From the two lateral tubules run two narrow oviducts. Anteriorly each oviduct is slightly swollen and form the seminal receptacle and the two open in the sac-like median genital chamber, the latter opening in the gonopore on the second abdominal segment below the bilobed operculum.