Paris, E. Orlhac, [1911-1912]. 4to (27.5 x 18.6 cm). 394 plates with explanatory text leaves, title pages and indexes. Contemporary half calf over marbled boards. Spine with five raised bands and gilt title. Marbled endpapers.

Rare, complete atlas dealing with algae, depicting over 1,000 species. With an ALS by the author dated 1936 stating "un travail d'Hercule". The work was published in five volumes, the last consisting of three parts. Only the first three volumes were published by Orlhac; the others were privately published by the author, the French botanist and popularizer of natural history, Henri Eugène Victor Coupin (1868-1937). The second and third volume carry the subtitle avec la collaboration.... The first title page does not mention the word "algae". Coupin wrote a less rare, similar-titled work on Fungi too. Light shelf wear, otherwise a very good, clean copy. Stafleu and Cowan, 1256.