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Description: | Onnia gracilis (Bancroft) [Syn. Trinucleus concentricus] The main interest in this specimen is the cephalon which is nearly complete, part of the right fringe is missing. On the reverse there are other cephalon fragments and also a paper arrow pointing to a thorax fragment, unfortunately not in a photograph. The rock is a hard, black shale and is from the Caradoc at Welshpool. Wales.The label indicates that this specimen was bought from G. B. Sowerby, of 15 Great Russel Street, Bloomsbury. Sowerby was at this adress in the 1850s. WG 10/11
an interesting Onnia cephalon in shale from Welshpool. Ordovician c455my incomplete cephalon | License: | http://creativecommons.org/licenses/by/2.0/uk/ | Publisher: | Dudley Museums Service | Rights holder: | Dudley Museums Service | Subjects: | Geology | Temporal: | Ordovician - Caradoc | Source: | Black Country History | Identifier: | http://www.blackcountryhistory.org/colle... | Go to resource |
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