TRANS. MIC. SOC. VOL. XV. N. S. PL. VII. 
OVARIAN OVA. — STICKLEBACK. 
SHOWING GERMINAL MATTER COLOURED WITH CARMINE. 
Fig. 1. 
Free germinal vesicle, its 
spots unchanged. After 
Dr. Ransom. 
Pig. 2. 
Free germinal vesicle, of which, the wall 
is raised at one part, showing the ' colloid 
mass.' After Dr. Ransom. 
Pig. 3. 
Fig. 4. 
Ovarian ovum, with large germinal 
vesicle. The yolk cracked and form- 
ing fissures radiating outwards. 
x 100. 
Pig. 5. 
Germinal spots from a ruptured germinal vesicle. 
X 550. The ovum was -fg inch in diameter, and 
the germinal vesicle 5^0 ■ 
Germinal spot3, with new centres (nucleoli) 
within them, and more minute germinal spots 
in the intervals between them. X 550. 
Pig. 7. 
Fig. 6. 
Germinal vesicle, showing ger- 
minal spots all over the surface. 
X 215. 
Fig. 9. 
Most minute ovarian ova under- 
going development, in the midst of 
a delicate tissue with cells. 
X 550. 
Fig. 8. 
Supposed section of germinal 
vesicle, showing germinal 
matter throughout. 
Fig. 10. 
Globules of yolk, with germinal matter 
(nuclei). Advanced ovarian ovum 
X 215. 
Extremely small germinal spots. 
X 1700. 
1000th inch , , x 215. 
„ „ , , x 550. 
> > > > i i 
x 1700. 
L. S. B., April, 1367.] 
