TRANSACTIONS OF WAGNER 

 796 



TERTIARY FAUNA OF FLORIDA 



Modiola sulcata Lam., An. s. Vert., vi., p. 113, 1819 (not of Lam,, Ann. du. Mus., 



1807) ; Reeve, Conch. Icon., x., pL 10, fig. 74, 1858. 

 Modiola Chemnitsii Potiez and Michaud, GaL MolL, 1838 ; fide Morch. 

 Brachydontcs modiolus Woxoh., Cat. Yoldi, ii., p. 54, 1853. 

 Mytilus cubitits Say, Journ. Acad. Nat. Sci. Phila., ii., p. 263, 1822 ; De Kay, Nat. Hist. 



N. Y., Moll., v., p. 183, 1843; Gibbes, Cat. S. Car., p. xxii., 1848; Binney's Say, 



p. 90, 1858. 

 Pcrna {^Brachydontcs') Dwdiola H. and A. Adams, Gen. Rec. Moll., ii., p. 517, 1857. 



Pleistocene of south Florida and the Antilles ; recent from South Carolina 

 (Gibbes) south to the Antilles and Rio Grande do Sul, Brazil (Ihering). 



This species, which is excessively abundant where it flourishes at all, is 

 commonly known under Lamarck's name of sidcatns. It is very similar to 

 several of the nominal Tertiary species, and a full and good series of both 

 will be required to determine how far the older forms can be discriminated. 



The absence of a really good series of the fossils of this group makes it 

 impracticable to suggest any synonymy here, though probably some reduction 

 in the number of species will be demanded with further study and material. 



The following list includes the species hitherto named. 

 M. (B.) texa)ius Gabb, Proc. Acad. Nat. Sci. Phila. for 1 861, p. 371 ; Harris, 

 op. cit. for 1895, p. 46, pi. I, fig. 2. This was originally described as 

 Pcrna tcxana, and is from the Lower Claibornian and Midway Eocene. 



M. (B.) Saffordi Gabb, Journ. Acad Nat. Sci. Phila., 2d Ser., iv., p. 395, pi. 68, 

 fig- 30, i860; Harris, Bull. Pal, iv., p. 49, pi. 3, figs. 4, 5, 1896. Midway 

 Eocene. 



M. (B.) potoiiiacciisis Clark, Bull. U. S Geol. Surv., No. 141, p. 85, pi. 34, figs. 

 I a-\ c, 1896. Mideocene of Maryland. 



M. (B.) alabaniciisis Aldrich, Bull. Pal., ii., p. 16, pi. 5, fig. 13, 1895 ; Harris, 

 op. cil., ix., p. 47, pi. 7, fig. 9, 1897. Wood's Bluff horizon, Chickasawan 

 Eocene. 



M. {B.) inississippicnsis Conrad, Journ. Acad. Nat. Sci. Phila., 2d Ser., i., p. 126, 

 pi. 12, fig. 19, 1848. Lower Oligocene of Vicksburg, Mississippi. 



M. (B.) contractus Conrad, Pac. R. R. Rep., v., Geol., p. 325, pi. v., fig. 35, 1855. 

 Pacific coast Tertiary. Eocene? 



M. (B.) ornatiis Gabb, Pal. Cal., i., p. 184, pi. 24, fig. 166, 1865. Tejon Eocene 

 of California. 



