Experimental evidence is produced to show that during metamorphosis in Drosophila melanogaster:

  1. The growth-of the lateral oviducts depends on an influence of the ovaries.

  2. The growth of the ovaries does not depend on a reciprocal influence.

  3. The growth of the vasa deferentia is independent of any influence from the testis.

1

This part, which connects by a fine ‘testicular duct’ with the testis, is termed vas deferens by some but vas efferens by others, who reserve the name vas deferens for the ejaculatory duct.

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