18 BOTANICAL GAZETTE [yuny 
Fic. 20.—Two neck canal cells and ventral ote cover — forming a periph- 
eral segment, while primary neck canal cell is in 
Fic. 21.—Two neck canal cells and ar ac paieery neck canal cell 
in divisio: 
es 22.—Two neck canal cells and ventral cell; first initial cut from base 
of cover in division. 
G. 23 Lg SRG IRE VE ery | ai pe re 1 lI a °. Poe, al 
eral segment 
Fic. 24.—Three neck canal cells and ventral cell. 
Fic. 25.—Three nee canal cells and ventral cell; middle neck canal cell 
in division. 
Frc. 26.—Three neck canal cells and ventral cell; topmost neck. canal 
cell in division. 
_ Fic. 27.—Four neck pane cells and ventral cell. 
PLATE III 
Fic. ee neck canal cells and ventral cell; second neck canal cell 
from ventral cell in division. 
Fic. 29.—Four neck canal cells and veopeal cell; simultaneous division | 
pe ond pen ek oe while Cowes: cel AO@ 6 reve Metial to 
Fic pan Tr, come ° 1 4}. me | ‘ut W Lay oe a 
. . 
1 segment. 
- Fic. Stour neck cna ls nd venta cl cover cll ang second 
ges age ce ee 
— carom ase af cover cl ; eee - 
ce "Fic. 35-—Five neck canal ells and ventral el; second neck canal cell 
Pec 34-—Five neck canal cells ad ventral cell; stop 10S! 
“Fic. o-Sewek can role ead sential oa : : . 
Ne. ees —_ canal cells and ventral cell; pet 5 ck canal <a 
al el; fifth neck canal ell rom 
cea: neck canal call - 
teal a a 
