BENIRSCHKE ET AL.: OVULATION IN DOLPHINS 





Figure 18. — Young corpus luteum in nonpregnant animal. Note central cavity (top) is filled with fibrin and granulosa layer is 

 penetrated by capillaries (black). Size of granulosa lutein cells is much smaller than in Figure 11, an early pregnant specimen (no. 3, 

 Table 7; hematoxylin and eosin x 100). 



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Figure 19. — Endometrium of same specimen as Figure 18 to show increased glandular coiling and earliest appearance of light 



cytoplasmic vacuoles in dark epithelial cells (hematoxylin and eosin x 100). 



521 



