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Hastings, A. B. (1944). XXXI.—Notes on Polyzoa (Bryozoa).—I. Umbonula verrucosa auctt.: U. ovicellata, sp. n. and U. littoralis, sp. n. Annals and Magazine of Natural History. 11(77): 273-284.
Hastings, A. B. (1944). XXXI.—Notes on Polyzoa (Bryozoa).—I. Umbonula verrucosa auctt.: U. ovicellata, sp. n. and U. littoralis, sp. n. Annals and Magazine of Natural History. 11(77): 273-284.
