39 
ago and had not become pregnant again. A band over the 
orificium prevented the fecundation completely. The portio 
was very much enlarged, and the openings on each side of 
the band were so small that I could not put in my finger on 
either side without tearing or dilating the opening. The 
band was 1¥% inches thick. 
As I mentioned before, the cervical canal can vary in 
regard to its direction, its width and the quality of the 
Fig. 10—Cow from Bonderup. 
Note the sinewy band covering the orifice. 
mucosa. The width of the os uteri externum and internum 
also differs very much. On account of the frequent swel- 
lings of the mucosa the orificium can change its location in 
every direction and can be of varying size. Sometimes it is 
hidden through the swollen mucosa or through one of the 
above mentioned bands of connective tissue; it can have the 
shape of a round and wide hole or of a mere slit. 
In sterile cows the cervical canal is generally so wide that 
