The scopula, stalk-forming region, is outlined by a circle of basal bodies that produce short modified cilia. Other basal bodies lie within this circle. The sheath is secreted outside the circle of ci...

The scopula, stalk-forming region, is outlined by a circle of basal bodies that produce short modified cilia. Other basal bodies lie within this circle. The sheath is secreted outside the circle of ci...

Mitochondria of Vorticella convallaria like other ciliates, have tubular cristae arising from their inner membranes. However, they also have a bundle of filaments (DNA?) that extend through the center...

The pellicular pore consists of the invaginated plasma membrane that penetrates the alveolus as well as the epiplasm and ends as a clathrin-coated pit. TEM taken on 3/14/72 by R. Allen with Hitachi HU...

A grazing section through the edge of the nuclear envelope. This illustrates nuclear envelope pores in face view. Polysomes, chains of ribosomes, are bound to the outer membrane of the nuclear envelop...

Accumulation of golgi cupulas near a food vacuole. The food vacuole shown has already fused with many vesicles that have already added their membrane as well as their dense inner lining to the vacuole...

Contractile vacuole pore in face view illustrating the microtubular ribbons that extend from the pore to the CV membrane, the coil of microtubules that surrounds the pore and smaller pellicular pores ...

Tangentially sectioned dictyosomes that give rise to cupulas (see Favard, P. and N. Carasso, J. Microscopie 3:671-696, 1964) and coated vesicles. TEM taken on 4/2/71 by R. Allen with Hitachi HU11A ope...

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...

Vorticella convallaria fixed for EM and buffered in cacodylate. The rough ER is not vesiculated as it is in collidine buffered fixatives but appears as sheets from which Golgi dictyosomes arise. A foo...