Crossword-Solution: DENTINE 7 letters, 28 clues 🏆 scrabble score: 8

They retained the evidence of their close relationship with the Devonian fishes in their cold blood, their gills and aquatic habit during their larval stage, their teeth with dentine infolded like those of the Devonian ganoids but still more intricately, and their biconcave vertebrae which never completely ossified.

Enamel and Dentine.—As the secretion decalcified ordinary bone, I determined to try whether it would act on enamel and dentine, but did not expect that it would succeed with so hard a substance as enamel.

Klein reports, “a great deal of enamel and the greater part of the dentine decalcified.” Experiment 2.—May 1st, fragment placed on leaf; 2nd, tentacles fairly well inflected, with much secretion on the disc, and remained so until the 7th, when the leaf re-expanded.

Klein reports, “a great deal of enamel and the greater part of the dentine decalcified.” Experiment 3.—May 1st, fragment moistened with saliva and placed on a leaf, which remained well inflected until 5th, when it re-expanded.

The decalcified dentine was now so tender that it was torn into shreds merely by the force of the re-expanding tentacles.] From these experiments it appears that enamel is attacked by the secretion with more difficulty than dentine, as might have been expected from its extreme hardness; and both with more difficulty than ordinary bone.