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Quarterly Journal of Microscopical Science, Vol s2-66, 595-626, Copyright © 1922 by Company of Biologists

Memoirs: Studies on Insect Spermatogenesis:. V. On the Formation of the Sperm in Lepidoptera

ROBERT H. BOWEN 1

1 Department of Zoology, Columbia University

1. The lepidopteran nebenkern passes through a series of condensation phenomena which are essentially similar to those previously described in Hemiptera.

2. The structure of the chromophilic material is probably that of a plate-work rather than a spireme.

3. The central substance is developed in the nebenkern exactly as in other insects.

4. The Golgi bodies in all probability give rise each to a small vesicle, these vesicles fusing gradually to form the acrosome.

5. As in other insects, the Golgi bodies are not directly transformed in the building up of the acrosome, but, after giving rise each to its miniature acrosomal vesicle, they pass back along the tail and are probably cast out of the sperm along with other detritus in the concluding stages of spermiogenesis.

6. The essential parallelism existing between the formation of the sperm in Lepidoptera and in other insects, especially the Hemiptera, is particularly emphasized.






© The Company of Biologists Ltd 1922