. Bulletin of the British Museum (Natural History), Geology. CRETACEOUS ECHINODERMS FROM WILMINGTON 151. 5 mm -I Fig. 59 Camera lucida drawing of oral plating in Holaster bischoffi () from the Lower Cenomanian of Wilmington. This species differs from H. subglobosus in a number of respects and the two cannot be confused when seen side by side. H. bischoffi differs from similar-sized H. subglobosus in having fewer ambulacral plates per column (Fig. 57), a more rectangular profile with the anterior more vertical and less convex and the dorsal surface more flat, and the periproct situated p
. Bulletin of the British Museum (Natural History), Geology. CRETACEOUS ECHINODERMS FROM WILMINGTON 151. 5 mm -I Fig. 59 Camera lucida drawing of oral plating in Holaster bischoffi () from the Lower Cenomanian of Wilmington. This species differs from H. subglobosus in a number of respects and the two cannot be confused when seen side by side. H. bischoffi differs from similar-sized H. subglobosus in having fewer ambulacral plates per column (Fig. 57), a more rectangular profile with the anterior more vertical and less convex and the dorsal surface more flat, and the periproct situated proportion- ally higher on the posterior surface (Fig. 56, and compare Pis 30 & 31). In the apical disc of H. bischoffi ocular IV and genital 3 barely touch (Fig. 58), whereas in H. subglobosus these two plates have a considerably broader contact (Fig. 60). Holaster subglobosus (Leske 1778) PI. 31, figs 1-4; PI. 40, fig. 1; Figs 56, 57, 60a, b, 61 1778 Spatangus subglobsus Leske: 240; pi. 54, figs 2, 3. 1881 Holaster subglobosus (Leske) Wright: 319; pi. 73, fig. 1 (see also for full synonymy). 1883 Holaster altus Bucaille: 21; pi. 5, figs 1-8 (non Agassiz). 1894 Holaster subglobosus (Leske); Lambert: 61. 1917 Holaster subglobosus (Leske); Lambert: 205. 1924 Holaster subglobosus (Leske); Lambert & Thiery: 403. 1955 Holaster subglobosus (Leske); Szorenyi: 225; pi. 12, figs 1-3; pi. 13, fig. 2. 1963 Holaster subglobosus (Leske); Cayeux: 21; fig. 6. 1972 Holaster subglobosus (Leske); Ernst: 117; fig. 20, 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 British Museum (Natural History). London : BM(NH)
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