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Kott, P 1952 Observations on compound ascidians of the Plymouth area, with descriptions of two new species. Journal of the Marine Biological Association of the United Kingdom, 31 (1). 65-83.
Kott, P 1951 Corella halli n.sp., a new ascidian from the English Channel. Journal of the Marine Biological Association of the United Kingdom, 30 (1). 33-36.