Sowerby (iii), G. B. III, 1913. The Annals and Magazine of Natural History, 8 (10 ).
New Species-Group Names:
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optimus Sowerby iii, 1913. p. 235. pl. iii. f. 7.
Sowerby (iii), G. B. III, 1913. The Annals and Magazine of Natural History, 8 (10 ).