The sagittal suture is located between the two parietal bones of the skull.

Of or pertaining to an arrow; resembling an arrow; furnished with an arrowlike appendage., Of or pertaining to the sagittal suture; in the region of the sagittal suture; rabdoidal; as, the sagittal furrow, or groove, on the inner surface of the roof of the skull., In the mesial plane; mesial; as, a sagittal section of an animal.

the sagittal suture

yes

No, the parietal and frontal bones are joined by the coronal suture. The saggital suture joins the parietal bones to each other.