British seaweeds, London, Bell and Daldy, 1872, algae, Great Britain, marine algae, The illustration showcases various species of algae, highlighting their distinctive shapes and forms. Each specimen is meticulously labeled with its scientific name: - The first row displays **Oscillatoria species**, characterized by elongated, filamentous structures. - Following it, **Spirogyra tenuissima** is depicted, known for its spiral arrangements. - The third section includes **Oscillatoria nigro-viridis**, illustrating darker, segmented strands. - Next, **Oscillatoria subaliformis** is shown, featuring a more ribbon-like appearance. - Below, **Oscillatoria insignis** offers a closer look at unique, sinuous structures. - Lastly, **Monomorium tataricum