PLEIOCENE FOSSILS. 147 



BUSYCON (J N R A D I I .— {New Species.) 

 Plate XXIX. Fig. 4. 



B. testa sub-pyriformi, ventricosa; anfractibus medio convexis, superne angulatis, densis 

 rugosis lineis spiratim striatis; spira brevi, turrita; sutura profunde lateque excavata, lateri- 

 bus rectis, obtusa, carina marginata; apertura postice aut emarginata aut contracta, antice 

 canaliculata; rostris recurvis; labio concavo; labro acuto, obsolete dentato. 



Description. Shell sub-pyriform, ventricose ; whorls convex in the middle, angulated 

 above ; spirally striated, with closely arranged wrinkled lines ; spire short, turrited ; 

 suture deeply and widely excavated, with straight walls or sides, margined by an obtuse 

 carina ; aperture posteriorly emarginated or contracted, anteriorly canaliculated ; beak 

 recurved, pillar lip concave, outer lip acute, dentations obsolete. 



This shell resembles somewhat B. canaliculatum, but is distinguished by being more 

 ventricose, without tubercles or spines on the whorls ; the whorls of the spire convex on 

 the sides, flattened or inclined between the obtuse ridge which margins the suture and the 

 angle of the whorl; angles of the two superior whorls of the spire slightly nodulous ; the 

 beak is slightly recurved in adult shells. 



We name this species in compliment of T. A. Conrad, Esq., the distinguished palaeon- 

 tologist. 



Plate XXIX. Fig. 4. 



Locality. Sumter. Museum, College of Charleston 



CASSIDULUS.— Humph, (1797.) 



PYRLILA.— Lam. (1822.) 



CASSIDULUS C A R L I N E N S I S . — (New Species.) 

 Plate XXX. Fig. 1. 



C. testa pyriformi; spira brevi, depressa; sutura profunde canaliculata, obtusa ad anfrac- 



