6 F, J. F. Barrington, 



approximately equal frequency in the two groups. In the cat, the G-raafian 

 follicles are at times found in an extreme state of dilatation, forming 

 very marked projections from the surface of the ovary: this occurred 

 in fifteen of the hundred cases, and thirteen of these or, 87 %, were cats 

 with ,, mucin glands", six having the extreme mucin type of gland. The 

 uteri were divided into groups according to the development of their 

 glands: in those with the greatest glandular development, the glands 

 were composed of tall columnar cells, were closely packed and extended 

 quite down to the muscle layer, at any rate in part of the circumference 

 of the mucous membrane. Twelve of the hundred belonged to this 

 class, eleven, or 92%, were cats with ,, mucin glands" and of them, eight 

 were of the extreme mucin type. Pigment is said to occur in the uterus 

 of the bitch most frequently in the period of recuperation of the oestrus 

 cycle [71, this apparently has not been proved for the cat. It did occur 

 in forty-six out of the hundred uteri examined, of these eleven, or 24%, 

 were cats with ,, mucin glands". It was therefore evident that cats, whose 

 Bartholin's glands contained large quantities of mucin in their epi- 

 thelial cells more frequently had dilated G-raafian follicles and hyper- 

 trophied uterine glands than average cats and less frequently had 

 pigment in the uterus: this was more marked still for the dilated fol- 

 licles and hypertrophied uterine glands if only those cats whose glands 

 were of the very extreme mucin type were considered. These three 

 facts seem only explicable on the assumption that the gland cells be- 

 come rich in mucin shortly before oestrus and lose it at or, soon after, 

 that time. One cat was apparently killed during oestrus or in the earliest 

 stages of pregnancy. It had blood on the vulva, the uterus was large 

 with a thick mucous membrane and greatly hypertrophied glands, the 

 ovaries had no dilated follicles but corpora lutea which appeared of 

 recent formation: in this cat the Bartholin's glands were composed 

 entirely of cells containing mucin, none were very tall; some were 

 short and the lumina of the acini were dilated with mucin. This gland 

 had therefore, the appearance of one of the extreme mucin type which 

 had begun to secrete actively. 



