. Bulletin. Natural history; Natuurlijke historie. 25m Text-fig. 3. Spicule types present in Plocamilla illgi. A. Thick styles. B. Acanthostrongyle. C. Acanthostyle. D. Thin styles. E. Spination on the head of a thin style. F. Palmate isochelas. G. Toxas. H. Spination on the head of a thick style. B. Adult Histology Histological sections reveal the presence of nucleolate cells, flagellated cham- bers, exhalant canals, subdermal spaces, and a dermis containing fibrous strands of material and other cells. Fiber cell tracts (see p. 19) containing thin styles are present and join the derm
. Bulletin. Natural history; Natuurlijke historie. 25m Text-fig. 3. Spicule types present in Plocamilla illgi. A. Thick styles. B. Acanthostrongyle. C. Acanthostyle. D. Thin styles. E. Spination on the head of a thin style. F. Palmate isochelas. G. Toxas. H. Spination on the head of a thick style. B. Adult Histology Histological sections reveal the presence of nucleolate cells, flagellated cham- bers, exhalant canals, subdermal spaces, and a dermis containing fibrous strands of material and other cells. Fiber cell tracts (see p. 19) containing thin styles are present and join the dermis. These tracts are occasionally perpendicular to the dermis, producing tufts of thin styles at the surface. As in M. pennata, these tracts are not as well developed or as numerous as in Thalysias. Rhabdiferous cells occur throughout the sponge and are very abundant in the dermis. In the mesenchyme they form a network rather than being randomly distributed as in M. prolifera. Globoferous cells are present in the tissue and in the dermis; many of them occur in groups. These cells usually lack smaller cytoplasmic inclusions as in M. seriata (PI. 10, fig. 2; PI. 17). Collencytes are lacking, as are nucleoli in epidermal 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 Peabody Museum of Natural History. New Haven : The Museum
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