Les Heliozoaires d'Eau Douce

Abstract

THE Heliozoa or “sun-animalcules” have always been favourite objects with microscopists on account of their abundance, especially in fresh water, their relatively large size, and their beauty as objects for the microscope. From the scientific aspect, however, they have not attracted so much attention as many other groups of Protozoa, on account, perhaps, of their somewhat isolated position from the systematic or phylogenetic point of view, no less than from their perfect innocuousness, so far as mankind is concerned. The work before us is a monograph of the fresh-water Heliozoa, based upon investigations upon those found in the environs of Geneva. It was the author's original intention, he tells us, to have confined himself to a description of the forms occurring in that territory, but since he obtained there nearly all the species hitherto known from fresh water, he has added to his catalogue descriptions of the species which appear not to occur in the sphere of his personal investigations in order to give his monograph a wider basis.

Les Heliozoaires d'Eau Douce.

By E. Penard. Pp. 341; illustrated. (Geneva: Henry Kundig, 1904.