Weaver, C. E., 1912. A Preliminary Report on the Tertiary Paleontology of Western Washington. Washington Geological Survey Bulletin, 15.
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New Species-Group Names:
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cowlitzensis Weaver, 1912. p. 54 pl. ii f. 20.
Weaver, C. E., 1912. A Preliminary Report on the Tertiary Paleontology of Western Washington. Washington Geological Survey Bulletin, 15.