Trondhjem, Kongelige Norske Videnskabers Selskabs, 1894. Two papers in one. 8vo (22.2 x 14.2 cm). 190 [180; 10] pp.; 24 [23; 1] attractive photographed plates. Contemporary pebbled half calf over marbled boards. Spine with five raised, gilt-stippled bands, gilt title and vignettes. Marbled endpapers, top edge gilt. Original printed wrappers bound in.

Two fine publications by the Norwegian algologist Michael Heggelund Fosley (1855-1909) on the little-known and poorly understood calcarous algae. The supplement deals with species from California and the Magellanean faunal province. Must be rare as we never had a copy. Slight rubbing to the boards, otherwise very good. Not in Stafleu and Cowan.