190 
CHAS. H. o’dONOGHUE. 
The following is a list of the material employed: 
Series. 
1 . . 
2 . . 
3. . 
4. . 
5. . 
6 . . 
7. . 
8 . . 
9. . 
10 . . 
11 . . 
12 . . 
13. . 
14. . 
15. . 
16. . 
17. . 
18. . 
19. . 
20. . 
21 . . 
22 . 
23. . 
24. . 
25. . 
Dasyurus Viverrinus. 
Description of Material. 
Before Ovulation. 
The pouch of a young animal 3 months after birth. 
The pouch of a young animal 20 weeks after birth. 
Animal getting into heat. Graafian follicles about ripe. 
In heat, ova not yet shed. 
During Pregnancy. 
Ova shed and just entered the uteri. 
Ova in one- or two-celled stage. 
Ova mostly in two-celled stage, some one-celled. 
Embryos in blastocyst stage, 124 mm. in diameter. 
14 „ 
3*75 „ 
,. in vesicle stage 4‘5-6*0 mm. in diameter. 
„ „ 6*5 mm. in diameter; primitive groove 
stage. 
Flat embryos. 
Unattached embryos older than 13. 
Greatest length. 
Embryos just attached to uterus .... 4*3 mm. 
„ some time after attachment . . .4*7 
„ late uterine stage just before birth . 5‘75 „ 
After Parturition. 
Greatest length. 
New-born young in pouch just 
after birth .... 
5'5 mm. 
Young some hours old 
5'75 ,, 
Young about 24 hours old . 
6 . 
„ 36 „ . . 
6 „ . 
,, 12 days old . 
12 „ . 
„ 34 . . 
24 .. . 
,, 2 months, 5 days after 
birth .... 
5*7-6 cm. . 
,, 4 months after birth 
9*5 „ . 
Head length. 
2 5 mm. 
t 
15 
2‘8 cm. 
4 5 cm. 
After Ovulation not followed by Fertilisation. 
Twenty-three unfertilised ova present in the uteri. 
Nothing found in uteri. Ovaries with corpora lutea, about 
5 days after heat. 
26. 
27. 
