This image of Halteria was fixed in cacodylate-buffered fixative and stained. The round, dark bodies, possibly pigment granules, were transparent in other preparations are electron-opaque following th...

A nascent digestive vacuole with several acidosome-like vesicles docked at its cytosolic surface. The presence of the microtubules from the oral ribs signifies that this vacuole is still attached to t...

Grazing section through an accumulation of uncoated cupulas in the process of attachment to and fusion with a food vacuole membrane. The small round pores apparently represent early stages of fusion o...

A high resolution image of a layer of mucocysts docked under the pellicle. The pellicle has a plasma membrane and an alveolar sac system. Both basal bodies of a dikinetid are ciliated, and the food va...

11 micrographs of views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 4 food vacuoles. The helically contracted stalk is se...

A nascent digestive vacuole with several acidosome-like vesicles docked at its cytosolic surface. The presence of the microtubules from the oral ribs signifies that this vacuole is still attached to t...

A longitudinal section of somatic cilia of Coleps showing the axoneme, basal body, and attached fibrous and microtubular elements. Adjacent digestive vacuoles and cortical cytoplasm evident with typic...

Acid phosphatase is present in tubules retrieved from late DV-III. The tubules and rounded expansions arising as a result of late DV-III membrane retrieval contain an electron-opaque reaction product ...

This section represents one in a series of serial sections. At this point the two parts of the macronucleus are now connected by a DNA replication band similar to the hypotrichs (e.g. Euplotes). The l...

This group represents a serial series of sections. At the level of this section, numerous food vacuoles, only three cross sectioned cilia remain of the perioral ciliature. TEM taken on 3/12/71 by R. A...