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TEM images from the anterior segment of a squid lens from a section cut parallel to the direction of the fibres. The red letters C and N indicate the area of the image in which the newly accrued immature lamellae are located towards the outer cortex (C) and the more mature lamellae towards the nucleus (N) of the anterior segment. The red arrows in Fig. 5C indicate what appear to be an adjacent pair of membrane structures separated by a slightly darker channel.
