11
3
July
410
420
RUSHTON, A. W. A. 1968. Revision of two Upper Cambrian trilobites. Palaeontology, 11, 3, 410–420.
A. W. A. Rushton Conocoryphe? bucephala Belt, 1868, from the Upper Ffestiniog and Lower Dolgelly Beds of Wales and possibly England, is re-illustrated; the pygidium is described for the first time; the species is transferred from the Olenid genus Beltella to which it was referred by Lake (1919) to Parabolinoides Frederickson, a genu: widely known in the approximately contemporaneous Conaspis Zone in the U.S.A.Sphaerophthalmus major Lake, 1913, though regarded by Henningsmoen (1957) as of questionable validity is distinguishable from other species of Sphaerophthalmus; S. major occurs in England, Wales, and Sweden, anc probably in Norway and eastern Canada, in the Zone of Peltura scarabaeoides. The Palaeontological Association (Free Access)