PLATE LV1I. 



OVARIAN OVA. STICKLEBACK:. 



SHOWING GERMINAL MATTER COLOURED WITH CARMINE 



Fig. 347. 





sis. o-lo. 



germinal vesicle, its 

 . unchanged. After 

 Dr. Ransom. 



Free germinal vesicle, of which tile wall 



is raised ai one part,, showing the ' colloid 



mass.' After Dr. Ransom. 



Fig. 343. 



ovarian ovum, witii large germina 

 vesicle. The yolk cracked and form- 

 ing fissures radiating outwards. 

 X 100. 



i?lg. 349. 



Germinal spots from a. ruptured germinal vesicle. 

 X 650. The ovum was o 1 ; inch i 

 the germinal vesicle 



Germinal spots, with new centres (micleoli) 



within them, and more minute germinal spots 



in the intervals between them. X 5oO. 



Germinal vesicle, showing ger- 

 minal spots all over the surface. 

 X 215. 



minute ovarian ova v 



.-*t of 

 a delicate tissue with cells. 



X 660 



. 352. 



Supposed section c. 



vesv.. :ninal 



.: OUgllOUt. 



Fig. 353. 



Glotul^s of yolk, with germinal matter 

 (nuclei). Advanced ovarian ovum 



x Jlo. 



Extremclv small germinal spots. 

 X 1700. 



lOGGth iach , , x 215. 



x 550. 



Pa*e 307. 



[To face page 306. 



