GROWTH-CHANGES IN MAMMARY APPARATUS OF DASYURUS. 209 
consisting of refractive granules, round and angular (= secre- 
tion of anal glands). 
1 . vii . ’01. — Much the same, but no secretion. 
3 . vii . ’01. — Pouch slightly tumid round margin, slightly 
moist, not cleaned. Fresh male in ; no action. 
5 . vii . ’01. — Pouch tumid, more moist centrally, and looks 
cleaned but dirty round margin. 
10 . vii . ’01. — Distinctly tumid but slow in altering. 
13 . vii . ’01. — Very distinctly tumid, somewhat lax; not very 
moist, sebaceous glands just showing. 
15 . vii . ’01. — Sebaceous glands now very prominent. 
Pouch flaccid and deepened, but not greatly. Killed. Both 
uteri very large and vascular. 
Left uterus, 4*1 x 4*1 x l’l cm. ) 
Right uterus, 2*7 x 4’1 x PI cm. j 11U § oun 
Altogether, then, the mammary glands of five females in 
which ovulation was not succeeded by pregnancy were 
investigated. 
Series No. 26. — Twenty-three unfertilised ova in the 
uteri. 
Series No. 27. — Ovaries with corpora lutea about 5 days 
after heat. 
Series No. 28. — Ovaries with corpora lutea about 6 days 
after heat. 
Series No. 29. — Ovaries with corpora lutea about 18 days 
after heat. 
Series No. 30. — Ovaries with corpora lutea about 21 days 
after heat. 
The Cutaneous Glands of the Pouch Area. 
The tumidity in the pouch of the animals now being 
considered is caused in great measure by the enlargement of 
the sebaceous glands. This enlargement is noticeable soon 
after ovulation (No. 26), and reaches its maximum a few 
days after this time (No. 28), when the glands are in a 
condition comparable to that in the pregnant animals with 
