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)
6 Wisconsin Academy of Sciences, Arts, and Letters. imal part of the copulatory pouch a narrow tube 1 mm. in length leads into the vagina, opening opposite the duct from the re- ceptaculum seminis. Cement glands.-The cement glands are two long gradually tapering, tubular parts, very thin distally, but soon beginning to increase in diameter; the proximal part is much larger, this enlarged portion, the reservoir, being about one-quarter of the entire length. Each grland is 30mm. in length, the two uniting, as is common in Lepidoptera., in a common duct 2mm. long, which empties dorsally into the vagina 1mm. anterior to its proximal end and almost opposite, but a little posterior to, the opening of the receptaculum seminis. The entire thinner glandular por- tions lie in a twisted mass at the right side in the posterior part of the abdomen. The larger reservoir is generally dorsal to the vagina. Sections through the gland at any place in the distal third show the wall to consist of a layer of epithelial cells, each cell long and narrow, containing an elongated nucleus in the basal half and a number of small vacuoles scattered throughout the cytoplasm. Over the free ends of these cells is a loose chitinous layer which in the sections appears wavy. Scattered just under- neath this chitinous layer were a number of small nuclear-like bodies, many of which were elongated and nearly tubular (Fig. 14). Seen in a surface view the chitin appears marked off into small irregular spaces each one of which contains one of these nuclear-like bodies (Fig. 15). The chitinoas layer covering this part of the cement gland is a continuation of the same layer which is found to cover the inner surface of the gland through- out its entire length. The nuclear-like bodies appear detached from the epithelial cells, and attached to the chitinous layer, but this might easily be due to poor preservation of the tissue and not normal. Fig. 16 shows a section cut nearer the proximal end, although still in the narrow part of the gland, and we notice that the very narrow cells just described are replaced by wider ones which are somewhat pointed at their. free ends and may be separated from each other either throughout their entire length - Imm j I I I
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