Freeze fracture image of the surface ridges at the anterior end of the cell where kineties to the right and left sides come together at an angle at the anterior suture tip. In this area are numerous plates of IMPs in the P-face of the plasma membrane. Rings and rosette IMPs at the trichocyst exocytic sites are also seen. TEM taken on 10/2/80 by R. Allen with HU 11A operating at 75kV. Neg. 10,000X. The raw negative was scanned with an Epson Perfection V750 Pro and this high resolution image is best used for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).