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Tangential fractures through mature trichocysts. The planes in the
paracrystalline stacks are exposed. The body is laced to the membrane
but such associations must be severed when the trichocyst is
discharged as the membrane remains in the cell and is not extruded.
Pits are present on the E-face of the membrane (E). The
fracture ledge formed by the fractured cytosolic leaflet is indicated
(arrow). Compare this image with Figure 20 of P.
caudatum. EM taken on 6/27/88 by C. Schroeder with Zeiss 10A TEM.
Neg. 15,900X. Bar = 0.5µm.
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