Abstract: The uterine cervix of R. bieti was studed maeroscopically and microscopically. The results were as follows:
The cervix of R. bieti was not strongly developed and was not clearly demarcated from the corpus uteri. The cervical canal was straight or slightly bent and was not found any colliculus in it. The cervical glands and crypts of the cervical mucosa were absent in the eetocervix and the midcervix; whereas, in endocervix, a few cervical glands and erypts were found. The cervical squamo-columnar junction was located near the external os. The zone of transition between the stratified squamous vaginal epithelium and the cervical columnar epithelium in this animal was not clear. This junetion between both epithelia, therefore, was absent. There were two types of epithelial cells in the cervix, ciliated and seeretory. The later was predominant and it contained a lot of granules whieh were periodie acid schiff positive material. The percentage of the secretory and ciliated cells varied within different sections of the cervix. Ciliated cells of cervical epithelium oceured in 7-25% (table 2. ) The cervical stroma consisted of muscular and fibrous elements. In general, the morphological structure of the uterine cervix in R. bieti was similar to that of Presbytis francoisi, but it differed from that of macaques.

Key words: Rhinopithecus bieti; Uterine cervix; Morphological structure