. Bulletin of the British Museum (Natural History). 259 260. Figs 246-263 Roslricellula triangularis Williams. Figs 246, 247, paralectotypes GSM 75232b, a, latex casts of the external moulds of brachial valve and of a pedicle valve, both x4; Figs 248-250, topotypes BB 94227, 94226 and 94229 respectively, internal moulds of pedicle valves, all x4; Figs 251-252, topotypes BB 94231 and 94228 respectively, internal moulds of brachial valves, both x 4; all from Llanvirn ashes, Bryntowy, Bethlehem. Fig. 253, BB9249I. internal mould of a pedicle valve x6; Fig. 254, BB 92468, internal mould of the pos
. Bulletin of the British Museum (Natural History). 259 260. Figs 246-263 Roslricellula triangularis Williams. Figs 246, 247, paralectotypes GSM 75232b, a, latex casts of the external moulds of brachial valve and of a pedicle valve, both x4; Figs 248-250, topotypes BB 94227, 94226 and 94229 respectively, internal moulds of pedicle valves, all x4; Figs 251-252, topotypes BB 94231 and 94228 respectively, internal moulds of brachial valves, both x 4; all from Llanvirn ashes, Bryntowy, Bethlehem. Fig. 253, BB9249I. internal mould of a pedicle valve x6; Fig. 254, BB 92468, internal mould of the posterior part of a brachial valve x 6; Fig. 255, BB 92467, internal mould of a brachial valve x 8; all from the Rhyolitic Conglomerates, Ffairfach Group, type section. Fig. 256, BB 92489. dorsal view of a complete specimen x4; Fig. 257, BB 92486, ventral view of a complete specimen x4; Figs 258-259. BB 92483 and 92485 respectively, dorsal views of complete specimens x 6 and x 4; Fig. 260. BB 92487, ventral view of a complete specimen x 4; Fig. 261, BB 92480, dorsal view of a complete specimen x 4; Fig. 262, BB 92481, anterolateral view of a complete specimen x 4; Fig. 263, BB 92478, exterior of a pedicle valve x4; all from calcareous Llanvirn beds. Coed Duon, 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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