| It is separated by two tracts of unossified cartilage from the large series of bones connected with the auditory organ. |
| The nasal capsules are large and quite unossified though they are overlain by membrane bone. |
| The distal portion of the rib of the ninth cervical vertebra is unossified. |
| Below the meta-pterygoid is a tract of unossified cartilage, and then comes the quadrate. |
| When the occipital condyle is double, it is formed by the exoccipitals, and the basi-occipital is small or unossified. |
| In certain Fishes the cartilaginous cranium remains quite unossified, while completely enveloped in dermal bones. |
