actinophrys sol, a freshwater species of heliozoa often referred to as the "sun animalcule" - 單細胞生物 幅插畫檔、美工圖案、卡通及圖標雕刻圖像
magnification of various paramecia unicellular organisms with biological processes - 19th century - 單細胞生物 幅插畫檔、美工圖案、卡通及圖標
