The contractile vacuole pore is coated on its cytosolic side by helically wound microtubules. Other microtubules abut this helix and extend out to the surface of the contractile vacuole where they are...

During division new basal bodies develop accessory fibers and begin to move apart to take up a position equidistant between the older complexes. The new kinetodesmal fiber seems to be associated with ...

High resolution of a daughter micronucleus in anaphase of a dividing cell of Didinium nasutum. The chromosomes are compacted into one large heterochromatic body. Remnants of the mitotic division spind...

High resolution image of the decorated ER tubules and 'rails' on the surface of the ER next to the myonemal sheet. Dense rods accompany the surface ridges adjacent to the myonemes. Pellicular pores ar...

A high resolution image of the micronucleus and macronucleus of Opercularia coarctata. The nuclear envelope has numerous pores, at least as many per unit length as in the macronucleus. Some areas of t...

The endoplasmic reticulum exists in extensive sheets in the cytoplasm of Nassula immediately below the alveolar membranes. TEM taken on 3/14/69 by R. Allen with Philips 300 operating at 60kV. Neg. 16,...

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...

Detail of spongiome of CV. The tubular network is continuous with the filling CV at numerous points. Some spongiome tubules my be decorated with V-ATPases. TEM taken on 3/27/69 by R. Allen with Philip...

An image of the contractile vacuole in diastole (filling phase). Decorated spongiome surrounds the CV. The macronucleus, micronucleus, cytopharynx, and basal bodies of perioral membranelle are include...