Photomicrographs of a transverse section through an alligator internasal suture showing measurements of sutural area and sutural length.

<p><b>A,</b> An alligator internasal suture. <b>B</b>, Measurements of sutural area and sutural length. The ratio between sutural area (in red) and sutural length (in white) gives the averaged width of the suture. The sections are stained with Toluidine-blue.