. 1 r 0 1 'J .3 t LENGTH OF FOETUS PRESENT IN THE UTERUS IN METRES Fig. 127. Blue whales. Mean diameter of corpora lutea in ovaries of pregnant females, and length of foetus. O Corpus luteum of ovulation. ® Corpus luteum of pregnancy. • Former corpus luteum of pregnancy persisting during lactation. Largest old corpus luteum co-existent in the ovaries with a corpus luteum of ovulation or pregnancy.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectocean, booksubjectsci