The Passage of the Spermatozoa and Ova Through the Oviducts of the Rabbit. ∗

Conclusion

1. Spermatozoa are transferred from the vagina of the rabbit to its uterus by the muscular activity of the duct; 2, spermatozoa pass up the uterus by their own locomotion; 3, they ascend the Fallopian tube possibly by their own locomotion but chiefly through transportation by counter currents induced by the cilia; 4, the egg, in consequence of its size, so presses upon the ciliary surfaces of the tube that the cilia become effective in the downward passage of this body and thus supplement peristalsis.