(British Association Report 1865, 1866, 1868 and Quarterly Geological Journal
volumes 21, 25.) They therefore proposed to place them, and it seems to me with
good reason, at the top of the Lower Cambrian under the term "Menevian," Menevia
being the classical name of St. David's. The beds are well exhibited in the
neighbourhood of St. David's in South Wales, and near Dolgelly and Maentwrog in
North Wales. They are the equivalents of the lowest part of Barrande's
Primordial Zone (Etage C). More than forty species have been found in them, and
the group is altogether very rich in fossils for so early a period. The
trilobites are of large size; Paradoxides Davidis (see Figure 572), the largest
trilobite known in England, 22 inches or nearly two feet long, is peculiar to
the Menevian Beds. By referring to the Bohemian trilobite of the same genus
(Figure 576), the reader will at once see how these fossils (though of such
different dimensions) resemble each other in Bohemia and Wales, and other
closely allied species from the two regions might be added, besides some which
are common to both countries.
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