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Quarterly Journal of Microscopical Science, Vol s2-87, 385-391, Copyright © 1946 by Company of Biologists

Memoirs: The Effect of Removal of the Anterior Lower Sac on the Lateral Appendix in the Embryonic Olfactory Organ of Kaloula Borealis (Barbour)

CHI-LAN TSUI 1

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

The removal of the anterior lower sac from the embryonic olfactory organ of Kaloula borealis produced two different and opposite effects on the lateral appendix. In larvae 11-27 mm. in length the excision of the sac had a harmful effect and hastened the degeneration of the appendix. When the same operation was made on the larvae 28-38 mm. in length, however, the degeneration of the appendix was retarded. Early removal of the sac had also deleterious effect on the olfactory placode but did not, within the experimental period, influence its normal course of development.

Since the experimental animals made only limited growth in the laboratory, the later effects of the removal of the anterior lower sac remain unknown. It is planned to rear experimental larvae under more natural conditions.






© The Company of Biologists Ltd 1946