Pireella cymbifolia (Pterobryaceae) new to the flora, with comments on sea level and other factors influencing the phytogeography of Bermuda

The isolated North Atlantic island of Bermuda, lying 1000 km ESE of Cape Hatteras, North Carolina, USA, has received scant attention from bryologists since the last compilations of nearly a century ago (EG Britton, 1918; Evans, 1918), plus a few additions (Andrews, 1923; Dixon, 1936). Of the mosses listed by EG Britton (1918), those that are not widespread in both Europe and North America are of New World distribution, with a number having connections with the southern United States and particularly the West Indies. In the course of palaeontological investigations, I made collections of bryophytes in various localities in Bermuda, particularly at the entrances of caves. Among the specimens yet identified is one species not previously recorded from the island.