A view of the left side of the buccal cavity. It is covered by the plasma membrane, alveoli and a single partial layer of microtubules. Specialized cytoplasm lines the posterior end of this border. Or...

Detail of the tubular extension of the alveolus to the cytostomal cord and the whiskers that attach it to the cord. TEM taken on 4/10/74 by R. Allen with Hitachi HU11A operating at 75kV. Neg.18,500X....

The transition from 3 to 2 rows of cilia can be seen in this view of the AZM. TEM taken on 7/24/67 by R. Allen with Philips 200 operating at 60kV. Neg. 1,370X. Bar = 5µm. Standard glutaraldehyde fix...

Tangential section through the anterior half of the cytopharyngeal basket. Drawings and discussion of the basket can be found in a paper by Tucker, J. Cell Science 3: 493-514, 1968. TEM taken on 4/1/6...

Detail of the filamentous reticulum along the left side of the cytopharynx from which cytopharyngeal ribbons arise next to its nodes. Quadrulus associated ribbons lie between the filamentous reticulum...

This section is cut at a level where the macronucleus is folded so it appears to be in 2 parts and where the micronucleus is visible. Contractile vacuole, perioral kinetids, and the peristome is evide...

Didinium captures Paramecium. It is not unusual for an undersized Didinium to attempt to ingest a much larger Paramecium. In this case, the organisms were preserved before the outcome could be determi...

Tangential section through the anterior half of the cytopharyngeal basket. Drawings and discussion of the basket can be found in a paper by Tucker, J. Cell Science 3: 493-514, 1968. TEM taken on 4/1/6...

Cytopharyngeal rods, composed of microtubular bundles, form the wall of the basket. Rod lamellae are attached to one side of each rod. TEM taken on 3/13/69 by R. Allen with Philips 300 operating at 60...

The anterior end of Euplotes tilts upward and contains triplet rows of cilia which are elements of the AZM. Ridges between the membranelles of the AZM contain mitochondria and electron transparent ves...