L IT T R I N I D .E . 



91 



imperforate ; whorls about eight, in contact ; costae regular, simple, not reflected, equi- 

 distant, moderately elevated ; spaces between the costae, with numerous, approximate, 

 equidistant, impressed lines ; suture well impressed ; body -whorl with about sixteen 

 costse." — Say. 



Plate XIV. Fig. 4, Natural size. 



LocALTTY. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



LITTORINA.— Ferussac. 



LITTORINA IRRORAT A. — Gray. 

 Plate XIV. Fig. 5. 



Littorina irrorata, Gray, Zool. Beechey's Voy., pi. 31. fig. 1. 



Turbo irroratus, Say, Jour. Acad. Nat. Sci., Vol. 2, p. 239. 



Phasianella sulcata, Ravenel, Cat. Coll. Shells, p, 14. 



Littorina irrorata, De Kay, Zool. New- York, Art. Mollusca, p. 106, pi. vi, fig. 112. 



Littorina irrorata, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xx. 



Littorina irrorata, Stimpson, Shells of New-England, p. 33. 



Littorina irrorata, Tuomey &^ Holmes, Pleiocene Foss. So. Ca., p. 119, pi. xxvi, fig. 5. 



Description. Shell thick, top-shaped ; whorls, with numerous revolving, elevated, 

 obtuse, equal lines ; body-whorl very large ; suture well defined ; spire acute ; aperture 

 large, entire, rounded-ovate ; outer edge of lip thin ; labium thick. — T. Sf H. 



This shell is rare in the Meiocene, not very common in the Post-Pleiocene, but abundant 

 in a recent state on the salt marshes of southern estuaries, where they are seen in great 

 niimbers, clinging to the stems of the marsh reeds — Spatina glabra. Mr. Stimpson has 

 found it as far north as Connecticut. 



Plate XIV. Fig. 5, Natural size. 



Locality. Simmons'; Wadmalaw ; Cainhoy. 



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



