18 POST-PLEIOCENE FOSSILS. 



Genus, LEDA, — Schum. 



LEDALIMATULA. 

 Plate III. .Fig. 8. 



Nucula limatula, Sat/, Am. Concli., pi. 12. 



Nucula limatula, Gould, Invert. Mass., p. 98, fig. 62. 



Nucula limatula, Co?i., Foss. Ter. Form., p. 57, pi. 30, fig. 4. 



Nucula limatula. Con., Am. Mar. Conch., pi. 6, fig. 1. 



Nucula limatula, De Kay, Zool. New- York, Art. Mollusca, p. 180, pi. 13, fig. 218. 



Nucula limatula, Tuomey Sf Holmes, Pleiocene Foss. So. Ca., p. 52. 



Leda limatula, Stimpsofi, Shells of New-England, p. 10. 



Leda limatula. Say's Conch. United States, (Binney,) p. 164. 



Description. Shell elongated, compressed, smooth, polished, inequilateral ; buccal 

 side rounded ; anal side narrow, somewhat recurved ; lunule linear. 



Among the fossils of South-Carolina there are no forms of the genus with which this 

 species can be confounded. Its smooth surface, elongated form, and regularly carinated 

 pallial margin, are sufficiently characteristic. Occasionally a few obsolete concentric lines 

 may be seen on the disks, and one or two on the anal margin, towards its extremity. — T. t^- H. 



Leda limatula, according to Stimpson and Gould, is now living on the New-England 

 coast. I have never discovered a single living specimen on the Carolina shores, and it is 

 rare as a Post-Pleiocene fossil. In Tuomey& Holmes' Pleiocene Fossils of South-Carolina, 

 it is said to be abundant on this coast, numerous dead shells having been found upon the 

 beaches, but we fear these were from some sub-marine bed of Post-Pleiocene, and not 

 recent shells. It occurs fossil in the Meiocene of Virginia, and also in the Pleiocene of 

 North and South-Carolina. 



Plate III. Fig. 8, Natural size. 



Locality. Simmons'; Folly Island Beach. 



Museum, College of Charleston; Cabinet F. S. H. 



