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Quarterly Journal of Microscopical Science, Vol s2-87, 91-101, Copyright © 1946 by Company of Biologists

Memoirs: Morphological observations on the fate of the Lateral Appendix in the embryonic Olfactory Organ of Rana nigromaculata

CHI-LAN TSUI 1

1 Department of Biology, the National University of Yunnan, Kunming, Yunnan, China

1. The anlage of the lateral appendix is formed from the dorso-Iateral part of the olfactory placode in Rana nigro-maculata Hallowell.

2. The lateral appendix, a blind sac, is formed when the dorsal lumen is differentiated in its anterior part.

3. It increases in dimension as the olfactory placode further develops, but growth stops as soon as the anterior lower sac appears; it begins to degenerate when the medial nasal gland makes its appearance; and completely disappears towards the end of metamorphosis.

4. Histological changes are described.






© The Company of Biologists Ltd 1946