. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. MULTIPAROUS FEMALES 435 This type of corpus albicans is found exclusively in lactating females and differs from the more usual corpus albicans, both in its morphology and in its histology. The morphology is similar to that of a corpus luteum of ovulation (Text-fig. 5); the mural luteal tissue tends to be thin and usually has a relatively simple folded pattern, and not the very complicated arrangement associated with the full growth and expansion of the corpus luteum. The central connective tissu
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. MULTIPAROUS FEMALES 435 This type of corpus albicans is found exclusively in lactating females and differs from the more usual corpus albicans, both in its morphology and in its histology. The morphology is similar to that of a corpus luteum of ovulation (Text-fig. 5); the mural luteal tissue tends to be thin and usually has a relatively simple folded pattern, and not the very complicated arrangement associated with the full growth and expansion of the corpus luteum. The central connective tissue core is correspondingly simple, and clearly shows its derivation from the original cavity of the collapsed follicle. But the most conspicuous feature is the colouring. This is usually a pale yellow or yellow-buff in colour, as com- pared with the usually darker brown of the majority of the corpora albicantia. In this respect they are similar to the corpora aberrantia which have been described above (p. 380), and which represent former corpora lutea of ovulation. This gross resemblance is confirmed by the histological appearance. The difference between this anomalous type of corpus albicans and normal corpora albicantia is best seen in osmic-treated material (PI. V, fig. 5, cf. PI. V, fig. 6). In normal corpora albicantia the osmic-staining lipoid material is evenly distributed in the hyaline collagen representing the former glandular tissue, and is in granular form. In the anomalous corpora the lipoid material is usually in the form of discrete globules of varying sizes. Where the globules are large the lipoid material occurs at the periphery after fixation, and surrounds a central vacuole which was presumably fluid-filled. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences
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