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Sperm recovery from nidamental gland. Nidamental glands from a nursehound, Scyliorhinus stellaris (A), united by the oviducts and ostium. The gland was removed and cleaned (B) and split through its cranial–caudal axis, exposing its lumen (C). Scraping was done over its luminal epithelium using the edge of a scalpel (D) to collect a pearly mucus containing sperm. The scale bar indicates 3 cm.
