| In blennies the palatines are toothless, and the mouth not protractile. |
| Lips were fleshy and not protractile, being the superior larger than the inferior. |
| Trap termites using their long protractile tongues, which are covered with a thick, sticky saliva. |
| Ponyfish have a very protractile mouth, a phenomenon which can be demonstrated by squeezing the head, when the mouth will shoot forward. |
| Should we not call it a protrusible or protractile or even a protrusive roof? |
| Balbiani describes the buccal cavity as containing a protractile stylet. |
