REPRODUCTIVE CYCLE IN DASYUllUS VIVEERLNUS. 141 
Case 1 (17. vi . ^99) (P]. G, fig. 1). — Xo record beyond 
a label in the bottle stating that this female was probably 
getting into heat.’^ The above date shows that she was 
killed towards the beginning of the breeding season. The 
uteri measured 11 mm. by 7*5 mm. by 7 mm. in diameter. 
Sections show thaC apart from slight increase in size and in 
vascularity, fbey are practically in the resting condition. 
The mucosa averages 1*4 mm. in thickness. The uterine 
epithelium consists of low columnar cells wdth close-set 
nuclei, and has a thickness of *012 mm. 
The uterine glands vary in diameter from *032-*048 mm. 
They are distinctly coiled in the basal half of the mucosa and 
possess small but distinct lumina. The connective tissue 
matrix of the mucosa is for the most part dense and compact. 
Xumbers of leucocytes occur in it. The blood-vessels extend 
up between the glands and are already considerably en- 
larged. 
Case 2 '(Xo. 2, 21 . v. ^03) (PI. 6, fig. 2).— This female 
was killed on arrival. The pouch appeared reddish and was 
slightly moist. In the ovary occurred practically full- 
grown ova, with peripheral vesicular nuclei. The mucosa 
averages about 1*5 mm. in thickness and the uterine epithe- 
lium, *016 mm. The uterine glands are in a more active con- 
dition than in Case 1. They are more markedly coiled, are 
thicker and possess wider lumina, but the mucosa as a whole 
is less vascular. 
Case 3 (22 . vi . ’01). — Xo record beyond statement getting 
into heat.” Left uterus, 11 mm. by 11 mm. by 6 mm. Ova 
with peripheral vesicular nuclei and not quite full-grown. 
Graafian follicles small, with retinacula. 
The mucosa has a maximum tliickness of 2*2 mm. The 
uterine epithelium has increased somewhat in thickness, now 
mca,suring *02 mm. and is evidently in active growth, mitoses 
being not infrequently met with. The nuclei of its cells are 
narrow, elongated and closely packed, and situated at different 
levels. 
3‘he basal twc -thirds of the uterine glands are markedly 
