. Bulletin of the British Museum (Natural History), Geology. . Fig. 16. Protaspis (Europrotaspis) crenulata sp. nov. Imperfect dorsal shield. The holotype. Besom Farm Quarry. Slightly enlarged. Br., branchial plate ; , branchial duct; , branchial opening ; , cornual contact surface on branchial plate ; , cornual plate ; Do, dorsal disk ; Or, orbital plate ; , orbital aperture ; Ro, rostrum ; Sp, shells of Spirorbis attached to undersurface of dorsal disk. scales, which, relative to the largest plates known, are much greater than those figured in the tailed sp
. Bulletin of the British Museum (Natural History), Geology. . Fig. 16. Protaspis (Europrotaspis) crenulata sp. nov. Imperfect dorsal shield. The holotype. Besom Farm Quarry. Slightly enlarged. Br., branchial plate ; , branchial duct; , branchial opening ; , cornual contact surface on branchial plate ; , cornual plate ; Do, dorsal disk ; Or, orbital plate ; , orbital aperture ; Ro, rostrum ; Sp, shells of Spirorbis attached to undersurface of dorsal disk. scales, which, relative to the largest plates known, are much greater than those figured in the tailed specimens of the American species, although these are large compared with those recorded in other pteraspids (Bryant, 1934, pis. 22, 23, 24, fig. 1 ; Denison, 1953, text-fig. 74). Even more surprising is the fact that a number. 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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