United States National Museum, Smithsonian Institution, United States. Department of the Interior · Washington : Smithsonian Institution Press, [etc.]; for sale by the Supt. of Docs., U.S. Govt Print. Off. · leaf 265
239 NORTH AMERICAN EARLY TERTIARY BRYOZOA. a more or less widened cone and always witli the apex below. It maintains its normal position by the aid of long articulated filaments called vibracula, which are thus organs for the maintenance of stability. … Fig. 64. — Subfamily Lunulariidae Levinsen, 1909. A-C. Lunularia capulus Busk, 1884. A. Zoarium, natural size. B, C. Outer (celluliferous) and inner faces of the zoarium, X 25. (After Busk, 1884.) D-F. Lunularia patelliformis Maplestone, 1903. D. Inner face, X 25. E, F. Vibracular cavity and…
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