Publisher's Synopsis
Excerpt from The Origin and Early History of the Germ-Cells in Some Chrysomelid Beetles
The earliest worker whose results are worthy of consideration is Herold He has given a remarkably good description of the gross aspects of both ovaries and testes in several species of Lepi doptera, principally Papilio brassica, from a late embryonic period to the adult stage. For us the chief value Of his results lies in his discovery that the sex of the larva is already determined before hatching. He found the ovary to consist of four tubules, and the testis of four small sacs; the former with a duct at its posterior end and the latter with a duct extending from the center of its side.
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