Alwyn Williams

Lower Ordovician Brachiopoda from the Tourmakeady limestone, Co. Mayo, Ireland

The Caradocian brachiopod faunas of the Bala district, Merionethshire

Evolution of the shell structure of articulate brachiopods

The secretion and structural evolution of the shell of Thecipideidine brachiopods

Shell structure of the Craniacea and othercalcareous inarticulate Brachiopoda

The Barr and Lower Ardmillan series (Caradoc) of the Girvan District, South-West Ayrshire, with descriptions of the brachiopoda