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Journal of Experimental Biology 45,173-176 (1966)
Published by Company of Biologists 1966

The Pleated Surface of the Undischarged Thread of a Nematocyst and its Simulation by Models

R. J. SKAER 1 and L. E. R. PICKEN 1

1 Zoological Laboratory,Cambridge

1. Both Cellophane and velvet models have shown that packing barbs, attached to the inside of a fabric cylinder, in alternating whorls of three, generates a configuration of the fabric surface closely similar to that observed in the undischarged thread of the large holotrichous isorhizas of Corynactis viridis Allman.

2. When this assembly is caused to transform to the discharged configuration (a) there is no change in surface area and (b) there is no significant distortion of the fabric.

3. The model increases 3.08 times in length on transformation to the discharged configuration, as compared with an increase of 2.93 times measured on electron micrographs of median longitudinal sections.

Submitted on February 25, 1966






© The Company of Biologists Ltd 1966