Part 4

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RÜCKERT, J.

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DE SINÉTY, R.

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STEVENS, N. M.

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SUTTON, W. S.

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WALLACE, L. B.

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WILCOX, E. V.

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DESCRIPTION OF PLATES.

PLATE I.

Termopsis angusticollis.

FIGS. 1-3. Resting nuclei of spermatogonia, showing division of nucleolus.

4. Equatorial plate of spermatogonial mitosis, 52 chromosomes.

5-6. Young spermatocytes, showing division of nucleolus.

7. First maturation spindle, and two nuclei (6 and 8) in same cyst.