TRANSACTIONS OF WAGNER 

 I I 2O 



TERTIARY FAUNA OF FLORIDA 



held nearly in the same horizontal plane, being very flat. Ephippodonta Tate 

 (Trans. Roy. Soc. S. Austr., xi., p. 63, 1889, and xiv., p. 267, type E. Mac- 

 donaldi Tate, loc. cit.) is closely related to Galeomma and Libratula. 



In the absence of anatomical details Galeomma may be divided as follows : 



Section Galeomma s. s. (Type G. Turtoni Brod.) 

 Valves radially ribbed, hinge edentulous. Gape moderate. 



Section Amphilepida Ball. (Type G. polita Desh.) 



Valves smooth or concentrically faintly striated, hinge with a small denti- 

 form process on each side of the resiliary pit ; gape moderate. 



Section Paralepida Dall. (Type G. formosa Desh.) 



Valves radially sculptured, hinge with a dentiform process on each side of 

 the pit ; widely gaping. 



Subgenus Libratula Pease. (Type L. plana Pse.) 



Valves flat and smooth, carried horizontally both in the same plane, hinge 

 as in Galeomma. 



The summary of this group is added for completeness. No species are 

 known from the American Tertiary or recent fauna. 



Genus SOLECARDIA Conrad. 

 Solecardia Conrad, Proc. Acad. Nat. Sci. Phila., iv., p. 155, 1849; Journ., ad Ser., i., p. 



278, pi. 39, fig. I, 1850. Type 5. eburnea Conr., loc. cit., Lower California. 

 > Scintilla Deshayes, P. Z. S., 1855, p. 171 ; 1st sp. 5. Cumingi Desh., loc. cit., p. 173 

 (Panama), which is selected as type by Woodward, Man. Rec. and Fos. Shells, 

 Suppl., p. 470, 1856; H. and A. Adams, Gen. Rec. Moll., ii., p. 480, 1857; Desh., 

 An. s. Vert, bas Paris, i., p. 697, 1858; Fischer, Man. Conchyl., p. 1031 (fig. 775 

 exclus.), 1887; Cossmann, Cat. 111. Fos. Paris., ii., p. 50, 1887. 



Barclayia H. Adams, P. Z. S., 1874, p. 585; sole ex. Scintilla incerta Desh., Moll. Re- 

 union, p. 18, pi. 2, figs. 16-18, 1863. 



Barclaya, Zool. Record for 1874, p. 184; Fischer, Man. de Conchyl., p. 1032, 1887. 

 Lionelita Jousseaume, Mem. Soc. Zool. de France, i., p. 204, 1888. 

 Sportella sp., Deshayes ; Psammobia sp., Quoy, etc. 



The genus Solecardia Conrad was well defined and based upon a single 

 species, which, six years later, was redescribed by Deshayes under the name 

 of Scintilla Cumingi. In his account of the genus Scintilla Deshayes men- 

 tioned no type, but his first species was 5. Cumingi, which was named as type 

 by Woodward in the Supplement to his Manual published in the following 

 year. There is no doubt, as suggested by Fischer (Man., p. 1032), that the 



