1897 ] ZAMIA AND GINKGO 235 
Fic 3. Archegonium immediately after fecundation, showing male 
nucleus (#7), in the upper portion of the oosphere ; and isolated ciliiferous 
band of antherozoid producing fecundation at 4, 0, oosphere. X 30. 
Ginkgo biloba. 
Fic. 4. Germinating pollen grain in pollen cavity at apex of nucellus: 
ge, generative cell; sc, stalk cell; v7, vegetative nucleus. X 500. (From 
material collected June 1 
Fic. 5. Germinating pollen grain with generative cell showing blepharo- 
plasts or centrosome-like bodies; gc, generative cell; sc, stalk cell; wa, 
vegetative nucleus; fg, pollen grain. x 500. (From material collected 
July 27.) 
1G. 6. anual cell showing blepharoplasts. X 800. (From material 
collected July 2 
Fie. 7. Se cell in a later stage of development, showing the 
fusiform nucleus and blepharoplasts, and between these the nucleolus-like 
bodies described by Hirase. X 800, (From material collected August 30.) 
