Heptranchias howellii (Reed, 1946) (Selachii, Hexanchidae) in the Eocene of the United States and British Columbia /
by Welton, Bruce J.
Series: Paleobios ; . no. 17 | Contributions from the University of California Museum of Paleontology Published by : University of California, Museum of Paleontology, (Berkeley :) Physical details: 15 p. : ill. ; 23 cm. Year: 1974No physical items for this record
Cover title.
Bibliography: p. 14-15.
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