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 536
xample, to compare the size of the spiramen of Galeopsis with the smallness of the orifice of the com- pensatrix simply closed by a rimule or by a poster of an operculum. On the other hand, it is quite frequent to find on the same zoariiun some zooeeia deprived of spiramen and which nevertheless… … Range. — Maestrichtian — Recent. Fig. 146. — Genus Schizotheca The nature of the frontal is not always evident Hincks, 1877. in this genus. As we have not been successful with Schizotheca fissa Busk, 1858. Zooe- cia, X 45, with and without ovicell. our tangential sections, we have accepted the…
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