Sphenethmoid bone


  • Webster's Revised Unabridged Dictionary
    • Sphenethmoid bone (Anat) a bone of the skull which surrounds the anterior end of the brain in many amphibia; the girdle bone.
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In literature:

Mark on the skull with long needles and flag-labels the sphenethmoid and the pro-otic bones.
"Text Book of Biology, Part 1: Vertebrata" by H. G. Wells