agewinatra
Protococcaceæ.
Fig. 11.—Protococcaceæ. A, C, Protococcus. A, single cells. B, cells dividing by fission. C, successive steps in the process of internal cell division. In C iv, the young cells have mostly become free. D, a full-grown colony of Pediastrum. E, a young colony still surrounded by the membrane of the mother cell. F, Scenedesmus. All, × 300. G, small portion of a young colony of the water net (Hydrodictyon), × 150.
Protococcaceæ.
Fig. 11.—Protococcaceæ. A, C, Protococcus. A, single cells. B, cells dividing by fission. C, successive steps in the process of internal cell division. In C iv, the young cells have mostly become free. D, a full-grown colony of Pediastrum. E, a young colony still surrounded by the membrane of the mother cell. F, Scenedesmus. All, × 300. G, small portion of a young colony of the water net (Hydrodictyon), × 150.