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...

Nice view of the oral apparatus, macronuclear organization, cortex, and cytoplasm of Opercularia. Neg of unknown magnification. Estimate sizes from the approximate 0.2µm diameter of a ciliary axoneme...

An extreme example of peeling of the surface of nucleoli in which long threads unravel from the nucleoli. TEM taken on 5/27/82 by R. Allen with Hitachi HU11A operating at 75kV. Neg. 14,250X. Bar = 0.2...

This figure shows the connection between the peristome and the food vacuole forming zone where the alveoli end. The cytostome is the opening that connects these two zones. TEM taken on 6/13/69 by R. ...

Like other ciliates two types of nuclei are present. A germinative micronucleus and a RNA-producing macronucleus. Both have nuclear envelopes with pores and both have ribosomes attached to their outer...

Only the macronucleus contains nucleoli which is the site of ribosomal RNA synthesis and ribosome subunit assembly. This EM also contains the distal end of the food vacuole forming cytopharynx which c...

The peristome is covered on one side by the oral cilia and on the opposite by the ribbed wall. Lamellae from the ribbed wall extend into the nascent food vacuole forming region, the cytopharynx. This ...

Transmission electron micrograph of section through the macronucleus of Nassula sp containing many darkly staining nucleoli.

A grazing section through the dorsal surface of Euplotes showing cross sections of cilia in four of the sparsely ciliated kineties . A layer of mitochondria underlies the pellicle. A replication band ...

The 11 micrographs of the group are views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 3 food vacuoles; 2 segments of the ...