8 
Oliver and Salisbury. — On the Structure and 
Text-fig. 3. Conostoma oblongum. Restorations. The longitudinal section passes through two 
opposing ribs ; in the middle region the vascular bundles and nucellar wall are represented by 
a single line except in the transverse sections of the latter ; A and D are in part hypothetical. The 
hard testa is in black, parenchymatous tissue shaded, and the soft apical tissue cross-hatched. The 
ribs and ‘ blow-off’ layer are in white and the lagenostome in black, m, micropyle ; /, lagenostome ; 
p, plinth; t, tapetum (omitted from longitudinal section), x about 25. 
