. Bulletins of American paleontology. Text-figure 4. — Cortical frame of Pyramispongia niagnifica Pessagno, n. sp. (See Plates 20 and 21). Genus PYRAMISPONGIA Pessagno, n. genus Type species. — Pyramispongia magnijica, Pessagno, n. sp. Description. — Cortical shell spongy, subpyramidal in shape with cupolae situated at four corners of shell (PI. 19, figs. 5-6; PI. 13, figs. 2, 4); cupola arising from shelflike ring. Cortical shell often spinose with massive spines arising from center of cupolae. Cortical shell molded around peculiar spong}^ cortical frame (PI. 20, figs. 2-6; PI. 21, fig. 1
. Bulletins of American paleontology. Text-figure 4. — Cortical frame of Pyramispongia niagnifica Pessagno, n. sp. (See Plates 20 and 21). Genus PYRAMISPONGIA Pessagno, n. genus Type species. — Pyramispongia magnijica, Pessagno, n. sp. Description. — Cortical shell spongy, subpyramidal in shape with cupolae situated at four corners of shell (PI. 19, figs. 5-6; PI. 13, figs. 2, 4); cupola arising from shelflike ring. Cortical shell often spinose with massive spines arising from center of cupolae. Cortical shell molded around peculiar spong}^ cortical frame (PI. 20, figs. 2-6; PI. 21, fig. 1; Text-fig. 4). Latticed medullary shell spherical in shape connected to cortical shell by radially arranged solid beams which appear to be continuous with solid spines of cortical shell. Remarks. — Pyi-amispongia, n. genus, differs from Cavaspo-ngia, n. genus, by possessing a subpyramidal cortical shell with four cupolas, b}^ possessing solid rather than spong}^ radial beams, and by possessing a cortical frame. The cortical frame of Pyramispongia,. 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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