154 Veterinary Obstetrics 



6. Occlusion of the Os Uteri. 



7. Atony and Dilation of the Cervix Uteri. 



8. Loss of Cotyledons. 



9. Vaginitis. 



10. Persistent Hymen. 



11. Vulvo- Vaginal Adhesions, and Constrictions. 



12. Horizontal Vulvar Opening. 



13. Rupture of the Perinseura and Recto-vaginal Fistula. 



III. Impediments to Copulation and Fecundation refer- 



able TO Nervous Disorders. 



1. Excitability. 



2. Vaginismus. 



3. Violent Expulsive Efforts following Coitus. 



IV. Extreme Variations in Size of Male and Female. 



V. Infectious Diseases. 



