142 



GEORGE W. CORNER 



iti. ext.-- - 



tti. int:- 



>ran.- - . 







•■*•• 



ap. cz. 



, 



Fig. 4 a, Portion of wall of unruptured Graafian follicle (sow in heat, ova 

 maturing). Iron haematoxylin. X 380. b, A few cells from theca interna of 

 same specimen. X SOU. gran., membrana granulosa; th.int., theca interna; 

 th.ext., theca externa; sp.cz., spindle-cell zone of theca interna; b.v., blood- 

 vessels. 



