Skinner, Ernest B. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XV, Part I (1904)
Marshall, Wm. S.
The reproductive organs of the female maia moth, Hemileuca maia (Drury), pp. -Plate II ff. PDF (3.9 MB)
Er L, vvv - e, y WA v; if/ ssl .L shnts( iuTht. I or, oftener, for only a part thereof. Near the free end of each cell is a peculiar small ovoid body which does not so closely re- semble a nucleus as the bodies just described as present under the chitinous layer' (Fig. 14). They are quite homogeneous, stain darker than the surrounding cytoplasm, but are not seen distinctly in all cells of this region. Towards the proximal end of the thin glandular part just before it widens to form the reservoir, a distinct change is noted in the structure of the wall. The epithelial cells of Lwhich it consists are here of the same length as those just described, but are much wider. The nucleus is also different here, and, instead of lying with its long axis parallel to the long axis of the cell, lies transversely across it; it is also bent with the convex surface towards the basal end of the cell. Along its other surface which is concave, lies a peculiar body, rounded in outline, of a dark homogeneous appear- ance, with a yet darker small central portion from which radiate a number of dark lines none of which reach the periphery (Fig. 17). Similar cells have been described in many glandular tis- sues of insects by Dierckx (3), G-lison (5), and in the reproduc- tive organs of the Orthoptera by Fenard (4). From the dark central portion of this body a duct passes into the lumen of the gland penetrating the chitinous layer which is here present as in other parts of the gland. The wide proximal part of the gland has become a reservoir to hold the secretion of the other parts. Internally there is a chitinous layer much wider than in the glandular part, and very much folded. The epithelial layer has undoubtedly become functionless, and is represented by a thin layer of cytoplasm, without cell boundaries, in which are scattered a number of ovoid- nuclei here much smaller than in any other portion of the gland. There is an outer layer of longitudinal muscles which is not present in other parts of the gland. Vagina.-Tbe vagina is a continuation of the oviductus com- munis from which it differs, externally, only in its slightly greater width. Near its distal margin, along the dorsal walt, it bears a saccular evagination which receives the duct from the receptaculum seminis; nearly opposite to this the ductus sem- inalis opens. U U I A -M- arsh aII-Renrodurthip, Ortyane n-F -1ho k7,o&v,,v7,n r7
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