Joan L. M. Roach

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Photoreceptor cells of the compound eye were studied electron microscopically in crayfish Procambarus clarki that had been grown in complete darkness for 11 weeks. Since the microvilli of recently differentiated retinula cells appeared uniform in size and were regularly oriented, light is not necessary for their development. Variability in size of(More)
The junction in the crystalline cone in the compound eye of the crayfish Procambarus clarki is described. It consists of electron-dense pentahedrons arranged regularly all over the cytoplasmic surface of each membrane and dense material in the intercellular space. The cone is an entity formed by the secretion of the four cone cells so the junctional(More)
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