NT: anatomical boundary (CARO)
NT: morphological boundary (CARO)
NT: integumental surface. Issue #617
medial ocular gland additions based on ISBN:1118473523 and comments from Cindy. Issue #614
 * tidying of multi-cell-component part structure and NS laminae in anticipation of #620
updating NIFSTD/nlx xrefs and metadata, rewiring away from broken pages to replacements