| 1. | Testis → Bidder's canal → Vasa efferentia → Urinogenital duct → cloaca → cloacal aperture |
| 2. | Testis → Vasa efferentia → Bidder's canal → Urinogenital duct → cloaca → cloacal aperature |
| 3. | Testis → Urinogenital duct → Bidder's canal → Vasa efferentia → cloaca → cloacal aperture |
| 4. | Testis → Vasa efferentia → Urinogenital duct→ Bidder's canal → cloaca → cloacal aperature |
| A | B | C | D | |
| 1. | Bidder's canal | Adrenal gland | Urinogenital duct | Rectum |
| 2. | Bidder's canal | Adrenal gland | Urinogenital duct | Cloaca |
| 3. | Vasa efferentia | Adrenal gland | Urinogenital duct | Cloaca |
| 4. | Vasa efferentia | Thyroid gland | Urinogenital duct | Cloaca |