English:
Laggania cambria
Walcott 52
Fig. 1. Ventral view, natural size. m = mouth. U. S. National Museum, Catalogue No. 57555.
Date
Source
Charles D. Walcott:
Middle Cambrian Holothurians and Medusae
.
Smithsonian Miscellaneous Collections
Volume 57, Number 3 (Publication 2011). City of Washington. Published by the Smithsonian Institution. June 13, 1911.
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