secretion proceeds, some mucus still adhering to it; both magni- 
fied 16 diameters. 
14. A small portion of the caudicular sheath of one cell of the anther 
just burst, shewing the two tubular caudicule ; magnified 32 dia- 
meters. 
15. Transverse section of an anther in the direction of ab in fig. 9; 
magnified 16 diameters. 
16. Side view of a pollen-mass adhering to the stigmatic gland, and 
emitting the fecundating fluid ; magnified 16 diameters. 
17. Grains of pollen in the mature state ; magnified 200 diameters. 
