liEPRODUCTIVE CYCLE IN DASYLRUS VIVERRINUS. 148 
and eigliteen days after” (Hill, 14 , p. 8). It is tlms-evident 
that ovulation is not generally coincident with cestrus, but 
follows after a longer or shortei’ interval, amounting in some 
cases to six or seven or even more days. 
Dasyurus thus affords a marked contrast to the Eutheria, 
in the majority of which oestrus and ovulation are stated to 
be generally coincident (cf. Marshall ( 18 ) , p. 135 et seq.). 
During this period the changes in the ovary and pouch 
still continue. 
Uterine Changes. 
Case 1 (12. vi. ’02), PI. 7, fig. 3.— Female killed on 
arrival. Pouch, reddish, not moist, and only slightly tumid. 
Cloacal margins distinctly swollen and tumid. Lateral 
vaginal canals, uteri and Fallopian tubes enlarged, the uteri 
measuring 15 mm. x 13 mm. No trace of semen. Ovaries 
with prominent Graafian follicles, ova full-grown with 
peripheral nuclei, shortly before first polar mitosis. 
The mucosa has a maximum thickness of 2‘5 mm. The 
uterine epithelium ('04 mm. in thickness) is formed of very 
narrow columnar cells with, for the most part, basally situated 
nuclei, alternating in arrangement. The uterine glands 
(*048-"06 mm. in diameter) are markedly convoluted over the 
major portion of their extent. Their epithelial walls are 
formed of columnar cells with basally situated nuclei and 
with their inner ends distinctly ciliated, the cilia working 
outwards (PI. 8, fig. 10). Cilia would appear to be present 
over the entire extent of the gland lumina, though in some 
cases they are less distinct and perhaps absent at the basal 
extremities of the glands. We have observed this ciliated 
condition of the uterine glands also in Perameles. It is a 
feature of interest inasmuch as it affords an instance of a 
rather uncommon condition, viz. a glandular epithelium, com- 
posed of similar cells uniformly ciliated. 
The connective tissue, except immediately below the uterine 
epithelium, where it is dense and very cellular, is in the form 
