FREE INSTITUTE OF SCIENCE 



1117 



TERTIARY FAUNA OF FLORIDA ' 



In connection with these, studies I have repeatedly met with the difficulty 

 so commonly encountered when one begins to take up a group which has obscure 

 characters and inconspicuous minute shells. The descriptions and figures of 

 authors, whose attention has not been especially directed to these troublesome 

 little species, are frequently inaccurate and misleading to a degree which can 

 hardly be realized until one comes to deal with them. I have, therefore, dis- 

 carded literature whenever it was possible to obtain a specimen of the shell in 

 question or a magnified drawing of an author's type by a trusty hand. My 

 descriptions, identifications, and consolidations are based on specimens in nearly 

 every case ; I have not worried myself about the conflicting statements of 

 authors ; and this has been, as far as possible, my method of procedure through- 

 out this work. I need hardly say I have depended freely upon the excellent 

 figures of Bernard and Verrill, and am under great obligations to the unfailing 

 courtesy of Mr. E. A. Smith, of the British Museum. 



The following scheme is provisionally adopted. The name of the typical 

 species follows the date of the genus. The series commences with the most 

 specialized forms : 



Family CHLAMYDOCONCHID/E. 



Chlamydoconcha Dall, 1884. C. Orcutti Dall. 



Family GALEOMMATID.^. 



Ephippodonta Tate, 1889. E. Macdougalli Tate. 

 Galeomma Turton, 1825. G. Turtoni Broderip and Sowerby. 

 Sections: Amphilepida Dall, 1899. G. polita Deshayes. 

 Paralepida Dall, 1899. G. formosa Deshayes. 

 Libratula Pease, 1865. L. plana Pease. 

 Solecardia Conrad, 1849. 5". eburnea Conrad. 



Subgenera: Scintilla Deshayes, 1855. 5. philippincnsis Deshayes. 

 Spaniorinus Dall, 1899. 6". Cossmanni Dall. 

 Scintillorbis Dall, 1899. S. crispata Fischer. 

 Vasconiella Dall, 1899. Vasconia Jeffreysiaiia Fischer, 



Family SPORTELLID^. 



Sportella Deshayes, 1858. Psammobia dubia Deshayes. 



Section? Fabella Conrad, 1863. F. constricta Conrad. 

 Anisodonta Deshayes, 1858. A. complanata Deshayes. 



