Abstract
The entire head of an oystrich (Struthio camelus) was frozen. Its main dimensions were: 175mm long, 70mm wide, 75 mm high. The eyes were filled with several ml of formaldehyde. It was then systematically CT‐scanned in the Morvan hospital in Brest (France). 31 cross‐sections in the frontal plane, every 5mm, were kept for the study from the tip of the beak (total length: 115mm) to the cervico‐occipital, last cross‐section. The CT‐scan detailed very well the morphology of the beak which was very flat, and the internal structure of the nasal cavities: a mazzled, tightened structure. The ocular bulbs (28mm) were very large, quite joined on the middle plane. The brain was voluminous, located behind the brain with a maximal transverse diameter of 36mm. The cranial vault was very pneumatized, from the roof to the basis of the cranium, as for the lateral walls.
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