GROWTH - CHAN GE S IN MAMMARY APPARATUS OF DASYURUS. 191 
Series. 
28. . Nothing found in uteri. Ovaries with corpora lutea, about 
6 days after heat. 
29. . Nothing found in uteri. Ovaries with corpora lutea, about 
18 days after heat. 
30. . Nothing found in uteri. Ovaries with corpora lutea, about 
21 days after heat. 
Further Material. 
Series. Description of Material. 
31. . Perameles nasuta: New-born young in pouch just after 
birth. 
32. . Domestic cat : Some time after cessation of milk-flow, almost 
resting. 
33. . ,, „ Young uterine embryos. 
34. . „ ,, After birth, full flow of milk. 
35. . Rabbit : Last stages of pregnancy — few days before birth. 
36. . Guinea-pig : Towards the end of the milk flow. 
Tbe record, from Professor J. P. HilPs note-book, given 
below, which is that of No. 6 in the foregoing list, may be 
taken as a typical example of that given with each of the 
various pouches of D. viverrinus, and a further, more 
complete record will be given in connection with the changes 
that occur when ovulation is not followed by pregnancy. 
No. 6: Received from Bundaroon 16 . vii . *01 : Killed 
21 . vii . '01. 
16 . vii . ’01 : Pouch slightly tumid, cloacal margin swollen. 
17 . vii . ’01 : Pouch only very slightly tumid in centre — 
cloacal margin large and swollen. Male in ; Copulation 
1-5 p.m. 
19 . vii . ’01 : Pouch very slightly tumid, cloaca still swollen. 
20 . vii . ’01 : Pouch tumid centrally; slightly moist, very 
dirty. 
21 . vii . ’01: Pouch tumid; cleaned centrally, but dirty 
round margin; sebaceous glands not showing. Killed 4 days 
after copulation. 
Left uterus 1*8 x 1*6 x # 7 c.mm. with 11 ova. 
Right uterus 1*6 x 1*5 x *75 c.mm. with 8 ova. one and 
two celled. 
In order to facilitate comparison, all the figures have been 
