Cross fracture of cilia of the quadrulus. The basal body/cilium complexes are a little less tightly packed than in the peniculus. There are four or five rows of parasomal sacs interspersed with basal body rows in the quadrulus. Clathrin-coated pits and vesicles are most abundant under the quadrulus. The vesicles lying deeper in the cytosol are uncoated. TEM taken on 5/26/92 by R. Allen with Zeiss 10A operating at 80kV. Neg. 19,800X. Bar = 0.25µm. A print of the negative was scanned and processed in Photoshop. This image is best used for qualitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).