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Monro, C. C. A. (1927). On the families and genera of the class Echiuroidea. Annals and Magazine of Natural History (Series 9). 20(120): 615–620.
Monro, C. C. A. (1927). On the families and genera of the class Echiuroidea. Annals and Magazine of Natural History (Series 9). 20(120): 615–620.
