. Bulletin of the British Museum (Natural History). LOWER ORDOVICIAN BRACHIOPODA 11 Figured material length width Matching valves SM A. 104460 11 9-0 Exterior of 16 (14) SM 88 7-7 ]] SM 10 8-5 Horizons and localities. , and from uppermost Didvmograptus murchisom to lower Glyptograptits tereliusculus shales exposed in the stream section east of Bach y Graig, 1-5 km east of Llandrindod Wells (SO 072610); SM from the 'Llandeilo Limestone' (Nemagmptus gracilis Zone) of Harper's Quarry, Wellfield, 2 km north of Builth (SO 03753


. Bulletin of the British Museum (Natural History). LOWER ORDOVICIAN BRACHIOPODA 11 Figured material length width Matching valves SM A. 104460 11 9-0 Exterior of 16 (14) SM 88 7-7 ]] SM 10 8-5 Horizons and localities. , and from uppermost Didvmograptus murchisom to lower Glyptograptits tereliusculus shales exposed in the stream section east of Bach y Graig, 1-5 km east of Llandrindod Wells (SO 072610); SM from the 'Llandeilo Limestone' (Nemagmptus gracilis Zone) of Harper's Quarry, Wellfield, 2 km north of Builth (SO 037534).. Figs 11-14 Lingulelta cf. displosa Williams. Fig. 11, SM A. 104410, exterior of a pedicle valve x2; Figs 12a, b, SM A. 104460, matching valves x4 and latex impression of same x 2; Figs 13-14, SM A. 104464-5, latex impressions of exteriors of pedicle valves, both x 4; all specimens from Llanvirn shales. Bach y Graig, Llandrindod. Figs 15-21 Palacoglossa atienuata (J. de C. Sowerby). Fig. 15, BB 92265. internal part of exfoliated pedicle valve x 2-5; Figs 16-19. latex impressions of partially exfoliated pedicle valves GSM 16600 1654"' 16598 and 16599, respectivelv. all x2-5; all from Lower Llandeilo Flags, Coed Fig. 20, SM dorsal view of matching valves x4 trom Llanvirn shales. Upper Gilwern, Builth. Fig. 21, SM A. 16678, latex cast of external mould ot a pedicle valve x 4, from Llandeilo Flags, Wellfield, 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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