Trans. Roy. Soc. Edin. 
Vol. LI I. 
Professor Arthur Robinson: “The Formation, Rupture, and Closure of Ovarian Follicles in Ferrets and Ferret-Polecat 
Hybrids, and some Associated Phenomena.” — Plate IV. 
Fig. 21. 
C.p.o. 
E.f. 
CU.o. Fig. 24. 
