WOODHEAD, N., & R.D. TWEED 1948 Some new Welsh algae North Western Naturalist 23(1-4): 22-32, 2 text-figs, + 33 figs. [on pls. 6-8] P. 23 NOT SEEN (Latin at top of p. 24, so there must be a new species figured on page with the text-figs.)