PLEIOCENE FOSSILS. 129 



Description. Shell fusiform, ventricose, whorls compressed above, spirally and trans- 

 versely striated; striae at the base coarser and wrinkled; spire short sub-cancellated, 

 papillated ; aperture semi-lunar ; outer lip acute, smooth within ; columellar lip very thin 

 decumbent, almost obsolete, semi-callous not distinguishable from body-whorl but by 

 outline and color ; columellar varicose or tumid, tortuous, obliquely plaited with three folds. 



. The tumid ridge which begins at the middle plication on the columellar, is formed by 

 the successive termination of the siphonic notch or beak, and produced by the transverse 

 lines of growth. The semi-callous decumbent lip, described above is obsolete in the adult 

 shell as represented in plate xxvii, fig 8. 



We have inscribed this beautiful Volute to our valued friend George A. Trenholm, Esq., 

 who so liberally sustained the publication of this expensive work, and enabled us to 

 accomplish it in the first style of the art, and at home, in Charleston. 



Plate XXVII. Fig. 7, A young shell from Waccamarv. 

 " 8, An adult specimen, from Sumter. 



Museum, College of Charleston. 



MITRA.— Lam. 



MITRA CAROLINENSIS— Con. 

 Plate XXVII. Pig. 9. 



Voluta Carolinensis, Con., Sill. Am. Jour., 39, p. 387. 

 Mitra Carolinensis, Con., Sill. Am. Jour., 41, p. 345. 



M. testa fusiformi; anfractibus infra sutur am prof unde sulcatis; sulci margine superiori 

 carinato; spira elevata, prominens; lineis anfractuum superiorum elevatis, acutis, sub-cari- 

 natis; lineis anfractus basalis obscuris, ad basim tamen conspicuis; bast sulcata, valde striata; 

 columellari labro septem obliquis plicis instructo, quarum superior profunda, duae inferi- 

 ores pane obsolete eadem magnitudine. 



Description. Shell fusiform; whorls deeply channelled below the suture, superior 

 34 



