716 PROCEEDINGS OF THE ACADEMY OF [NoV., 



1863, Conrad, Proceedings Academy of Nat. Sciences of Pliiladelpliia 



for 1862, p. 578. 



1864. Carpenter, Supplementary Keport to the British Association, 



1863, p. 643 ; and Annals and Magazine of Nat. History, 3d 

 series, XIV, p. 434. 



1866. Conrad, Checklist of Eocene Fossils of North America, p. 5. 



1867. Conrad, American Journal of Conchology, III, pp. 13, 191. 



1869. Morse, Annual Report Peabody Academy of Sciences, Salem, 



Mass., p. 76. 



1870. Sandberger, Land und Siisswasser Conchylien der Vorwelt, p. 



3.5. 



1871. Dall, American Journal of Conchology, VII, p. 153. 



1872. Tryon, Proceedings of Academy of Natural Sciences of Phila- 



delphia, pp. 349-258. 

 1881. Dall, American Naturalist, p. 718. 

 1881. E. A. Smith, Proceedings of the Zoological Society of London, 



p. 43. 

 1885. Dall, Proceedinsrs U. S. National Museum, VIII, p. 549. 

 1885. DeGregorio, Bollettino Societa Malacologica Italiano, X, p. 153. 



1890. Stearns, Proceedings XJ. S. Nat. Museum, XIII, pp. 314-320. 



1891. Dall, Proceedings U. S. Nat. Museum, XIV, p. 189. 

 1893. SowERBY, Marine Shells of South Africa, p. 63. 



1895. Dall, Proceedings U. S. Nat. Museum, XVII, p. 713. 



1896, • Dall, State University of Iowa, Natural History Bulletin, II, p. 



16. 



1896. Bernard, Bulletin Musee d'Histoire Naturelle a Paris, II. 



1897. Bernard, Journal de Conchyliologie, XLIV, p. 197, 

 1897, Mayer Eymar, Journal de Conchyliologie, XLIV, p. 367, 

 1899. BoEHM, Verhandlung. d. deutscheu geol. Gesellschaft, Vol. 50, p. 



37, 

 1899. Sacco, Bollettino dei Musei de Zoologia, Universita di Torino. 

 XIV, No. 349, pp. 111-113 (May); and Moll, dei terrene terziare 

 del Piemonte e della Liguria, XXVII, pp. 5-33 (September). 



