Trans. Acad. Sci. of St. Louis, Vol. IX. 



Plate XXXVIIl. 



30 



.^i 



31 



32 



33 



34 





35 



36 



Thcjin riel. 



.^.Holnl A- Co.Litli.BalliiHopo. 



FERTILIZATION IN PERNS. 



