TRANSACTIONS OF WAGNER 

 1390 



^-^ TERTIARY FAUNA OF FLORIDA 



Lucina quadrisulcata Orbigny, Voy. Am. Mer., Moll., p. 584, 1846; Moll. Cubana (Sagra), 

 ii., p. 294, pi. xxvii., figs. 34-36, 1853 ; Arango, Moll. Cuba, p. 256, 1878. 



Lucina (Loripes) quadrisulcata Morch, Cat. Kierulf, p. 23, 1850. 



Cyclas quadrisulcata Morch, Cat. Yoldi, ii., p. 32, 1853. 



Lucina Conradi Orbigny, Prodr. Pal., iii., p. 117, pi. xxi., fig. 94, 1852. 



Cyclas Conradi Conrad, Proc. Acad. Nat. Sci. Phila. for 1862, p. 577, 1863. 



Lucina strigilla Stimpson, Shells of N. Eng., p. 17, 1851. 



Lucina americana C. B. Adams, Contr. Conch., p. 243, 1852 ; not of Defrance, 1823. 



Lucina quadripartita Jeffreys, Brit. Conch., ii., p. 236, 1863 (lapsus). 



Lucina commutata Dunker (MS. in Arango Moll. Cuba, p. 256, 1878) ; not of Philippi. 



Cyclas dentata Verrill, Inv. An. Vineyard Sd., p. 686, pi. xxix., fig. 211, 1873 (not of 

 Wood, 181S). 



Lucina (Divaricella) quadrisulcata Dall, Bull. U. S. Nat. Mus. No. 37, p. 50, i88g. 



Miocene of Maryland in Prince George County and elsewhere ; of Vir- 

 ginia at City Point on the James River, Petersburg, and various points on the 

 York River; of North Carohna at Wilmington, and the Natural Well and 

 Magnolia, Duplin County ; of South Carolina near Darlington ; of Walton 

 County, Florida, and of Texas in the deep artesian well at a depth of 2552 to 

 2600 feet below the surface ; not reported from the Pliocene, but a depauperate 

 smaller variety occurs at Simmons Bluff, South Carolina, in the Pleistocene ; 

 recent the species is reported living in ten to fifty fathoms from Nahant, Massa- 

 chusetts, south to the West Indies and to Santa Caterina, Brazil. 



This species and others were so long confounded with D. divaricata L. and 

 D. dentata Wood that the early synonymy cannot be disentangled without 

 more trouble than it is worth. The Miocene shells agree with the recent ones 

 and do not occur in the Pliocene, where they are replaced by a type more nearly 

 agreeing with the Oligocene D. chipolana, but appear to be represented . in the 

 Pleistocene by a form somewhat smaller and less developed than the recent 

 shell, perhaps due to the lower temperature of that period. The chief charac- 

 teristics of this species are the long, narrow, soinewhat sinuous lunule, the 

 straight hinge-line with the shell margin at its ends subangulate, the fine crenu- 

 lation of the margin of the valves, and the absence dorsally of the rude denticu- 

 lation due to the surface sculpture from which D. dentata Wood derived its 

 name. 



Divaricella dentata Wood. 

 Tellina dentata Wood, Gen. Conch., p. 19s, pi. xlvi., fig. 6, 1815 ; Dillwyn, Descr. Cat. Rec. 



Sh., i., p. 103, 1817. 

 Lucina serrata Orbigny, Moll. Cubana, ii., p. 295; pi. xxvii., figs. 37-39, 1846 

 Lucina Chemnitzii Philippi, Zeitschr. fiir Malak., iv., p. 151, 1848. 



