xix, 486 p., VII leaves of plates (1 double) : 31 x 23 cm
50th Cong., 1st sess., House, Mis. doc. no. 610
Includes index
Atlas has imprint date 1887
",Remarks on the genus Aucella, with especial reference to its occurrence in Califo r nia, by Charles A. White",: p. 226-232
Title on atlas: Atlas to accompany a monograph on the geology of the quicksilver deposits of the Pacific slope / by Geo r ge F. Becker