In Panderichthids (rhipidistian fish ancestors of amphibians), 2 sets of ossifications are present in the centra region. At posterior end, below the neural arch, are pleurocentra. This element gave ...

The origin of the occipital condyles of the skulls of vertebrata has not so far been elucidated. They are separate elements from the occipital arch and are ultimately superimposed on the latter, ...

WHEN the investing bones, mentioned in the last paper, are removed, the chondro-cranium of the axolotl is seen to have a far lower structure than that of the salmon. The hinder part of the skull-floor ...

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From time to time I pose this question to medical students and residents. It's an unfair question; indeed, it's something of a riddle, as it requires a read-my-mind approach to the correct answer. But ...