Regular maps and hypermaps of Euler characteristic −1 to −200

This paper describes the determination of all orientably-regular maps and hypermaps of genus 2 to 101, and all non-orientable regular maps and hypermaps of genus 3 to 202. It extends the lists obtained by Conder and Dobcsányi (2001) of all such maps of Euler characteristic −1 to −28, and corrects errors made in those lists for the vertex- or face-multiplicities of 14 ‘cantankerous’ non-orientable regular maps. Also some discoveries are announced about the genus spectrum of orientably-regular but chiral maps, and the genus spectrum of orientably-regular maps having no multiple edges, made possible by observations of patterns in the extension of these lists to higher genera.