sagittal

The third normal plane is the cingular (waist) plane: this is defined by the sagittal and transverse axes.

Valve symmetrical in zone and valve view along the sagittal line, but asymmetrical to the transverse axis, cuneate.

The sagittal plane of the valve of the auxospore is at right angles to the plane of the valve of the mother cell.

Simple dolichocephaly is due to synostosis of the sagittal, or antero-posterior suture of the skull.

One reconstruction was in wax, from sagittal sections, the other was a plotted reconstruction from transverse sections.