998 PALAEONTOLOGY OF NEW- YORK. 



L4)\oiieiiia pluiion;} rata ( n. s.)- 



Platb LIV. Fia. 13. 



Shell extremely elongate, very gradually and evenly tapering to the 

 apex : volutions tAvelve or thirteen (of which ten are preserved in the 

 specimen), about twice as wide as high, gradually ascending, depressed 

 convex on the exterior or a little flattened on the upper side of the 

 lower volutions, the last one scarcely ventricose, with a slight indica- 

 tion of an obtuse carina towards the base. Surface unknown. 

 The specimen figured is the only one seen. The upper vohitions are broken off 



or obliterated, and the aperture is imbedded in the stone. It may be recognized by 



its long and slightly convex volutions, the last one of which is nearly flat on its 



longitudinal slope. 



Fig. 13. The anterior side of the specimen, the apex of which, as represented in the figure, 

 preserves no marks of volutions. 



Geological position and locality. In the pentamcrus limestone : Schoharie county. 



Murcliisoiiia extenuata ( n. s.). 



Plate LIV. Fia. 15 & 16? 

 Shell elongate, attenuate : volutions uniangular ; aperture round-ovoid. 



Surface unknown. 



Fig. 15 is copied from a figure of Mr. Conrad, which is cited as from the Ten- 

 taculite limestone of Fayetteville, Onondaga county. 



Fig. 16 is a much worn specimen, which is perhaps of the same species. 



Geological position and locality. In the tentaculite limestone of Schoharie and 

 Onondaga counties. 



HI urcliisoiiia iiiinuta ( n. s.). 



Plate LIV. Fro. 17. 

 Shell minute : spire elongate, gradually attenuate ; volutions about nine 



or more, rounded, bicarinate. Aperture and surface unknown. 



Figures 17 are representations of the specimen, natural size and enlarged, from 

 figures by Mr. Conrad*. 



Geological position and locality. In the tentaculite limestone : Fayetteville, Onon- 

 daga county. 



• When these and some other flgnreg of Mr. Conbad were cupicd on Plate liv, I had hoped to bo able 

 to procure the specimens for final description, from the cabinet of the late Mr. Vanuxem. The sale of this 

 collection, and its removal to Tennessoe, has prevented the fulfilment of this intention. 



