Summary
An ultrastructural study of the tube foot wall of a regular echinoid,Diadema antillarum, was made. Ciliated microvillous epithelial cells, their inclusions, amoebocytes, and the arrangement of collagen and muscle in the tube feet are described. The neuropile, together with its vesicular components and possible neurosecretory elements, is considered and discussed as are connective tissue bridges across the lumen. Consideration is given to possible functions for the various components of the tube foot.
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I am indebted to ProfessorN. Millott for his help and encouragement during the course of this work, to Mr.Raynor L. Jones for his expert technical assistance, and to Dr.H. G. Vevers and the Zoological Society of London.
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Coleman, R. Ultrastructure of the tube foot wall of a regular echinoid,Diadema antillarum Philippi. Z. Zellforsch. 96, 162–172 (1969). https://doi.org/10.1007/BF00338764
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DOI: https://doi.org/10.1007/BF00338764