192 Natural History Bulletin. 



or slightly separated in the cast, coiled in the same plane so 

 that the spire and umbihcal sides are similar in appearance; 

 whorls nearly circular in transverse section, upper surface of 

 each marked by an obscure carina, with traces of another 

 carina still more obscure half wa}- between the middle of the 

 whorl and the suture. 



Raphistoma pepinense Meek. The collection contains 

 many specimens of this ver}' beautiful species. The spire is 

 depressed and consists of about six volutions in specimens 

 having a diameter of one inch. The peripher}^ is sharply 

 angulated and the umbilicus wide when compared with other 

 species of the genus. Compare R. ti'ochisciun Meek, in U. S. 

 Exploration of the Fortieth Parallel, Vol. IV. p. 19. 



Raphistoma zsiultivolvatum, n. sp. Shell moderately 

 large, more than an inch and a quarter in diameter; spire 

 depressed; whorls five or more in number, increasing gradu- 

 ally in size, each about one and a half times as large as the 

 preceding; each whorl bears an obtuse angular carina near 

 the suture ; suture somewhat deeply impressed ; upper surface 

 of each whorl concave; outer margin marked by a sharp 

 angle from which the convex lower surface of the last whorl 

 slopes downward and inward to the angle that bounds the 

 umbilicus. 



Raphistoma paucivolvatum, n. sp. This is a small len- 

 ticular species having from two to two and a half very rapidly 

 expanding whorls. 



HoLOPEA TURGiDA HttU. There are a number of speci- 

 mens indistinguishable from this species as it is described and 

 figured by Hall, Billings and Whitfield. See Paleontology of 

 N. Y., Vol. I, p. 12, Plate III, Figs. 9 and 10; and Lake 

 Champlain Fossils, by Whitfield, p. 50, Plate 9, Figs. 3-7. 



MuRCHisoNiA, sp. There are a few specimens referable 

 to this genus. They are characterized by an elongate spire 

 with many sharply angular volutions. 



