THE NAUTILUS. 



143 



collections. A recent sending from Mr. L. E. Daniels of the same 

 race from a point further down the Ohio valley is made the occasion 

 for describing it. The subspecies seems to be a characteristic and 

 abundant form along the lower Ohio river, its range southwestward 

 as well as up the river still remaining to be ascertained. 



It resembles the large P. tridentata complanatn in shape, but is in- 

 variably sharply striate and does not reach so large a size. 



DESCRIPTION OF TWO NEW TEKTIARY FOSSILS. 



BY CHARLES W. JOHNSON. 



CanceUaria rapella n. sp. 



Shell very fragile, spire but slightly elevated, depressed and ex- 

 cavated near the suture, with three and one-half whorls including the 

 protoconch, the latter smooth and consisting of one and one-half 

 whorls ; body whorl with about twenty- 

 five spiral ridges, those on the central 

 portion flattened and obsoletely 

 grooved, lines of growth prominent 

 and on the spire give the interstices 

 between the spirals a punctated ap- 

 pearance ; columella with two promi- 

 nent folds and a slight umbilical 

 rimation. Length, 29 mm. 



Miocene, Magnolia, Dauphin Co., 

 North Carolina. 



One specimen of this delicate shell 

 was found while cleaning the marl 

 from the interior of a large Busycon 

 maxima var. tritonis Conr., collected 

 by Mr. Joseph Willcox. It is related 

 to C venusta Tuomey and Holmes, 



but the shell is much thinner, spire less elevatcil and excavated 

 near the suture. Type in the museum of the Wagner Free Insti- 

 tute of Science, Philadelphia. 



Lineariaf divaricata n. sp. 



Sliell very thin, compressed, nearly equilateral, umbones smooth, 



CANCELLAEIA RAPELLA. 



