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Quarterly Journal of Microscopical Science, Vol s2-73, 707-739, Copyright © 1930 by Company of Biologists

Memoirs: The Early Development of the Chondro Cranium of the Lizard

G. R. de BEER M.A., B.Sc., F.L.S., C.M.Z.S.1

1 Fellow of Merton College, Lecturer of Magdalen College, Jenkinson Lecturer in Embryology, and University Demonstrator in Zoology, Oxford

1. The embryology of the chondrocranium has been studied in ten stages of the development of Lacerta agilis.

2. The splanchnocranium chondrifies before the neurocranium.

3. The crista sellaris has a paired and belated origin.

4. The constituents of the nasal capsule of Lacerta agree generally with those of mammals.

5. It is pointed out that the foramen ovale is not a derivative of the fenestra basicapsularis.

6. The otic process of Lacerta has a temporary cartilaginous connexion with the processus ascendens.

7. Points of similarity between the chondrocrania of Lacertilia and of other reptiles lead to the conclusion that the Lacertilia are derived from Diapsid reptiles.






© The Company of Biologists Ltd 1930