Notes on the Blue-Green Algae

Abstract

THIS little book should be of considerable service to those who desire to study systematically this group of plants, which is characterised by the presence of a bluish-purple colouring matter, phycocyanin, in addition to chlorophyll, in the cells. The cell-membrane is not composed of cellulose and glycogen takes the place of starch in the protoplasm. Mr. Wager first gives a general introduction on the structure, reproduction, and classification of the group, then keys to the orders and families, a key to the genera of the Oscillatoriaceæ, and finally a key to those species of Oscillatoria and Phormidium which are fairly well determined. In the latter it would have been of service if the localities in which they have been found uad been mentioned. The book concludes with a glossary and references to monographs and blank pages for notes.