1898] 



NATURAL SCIENCES OF PHILADELPHIA. 



463 



ing to the suture where it joins the callus of the peristome, which is 

 continuous to the base of the columella ; base with two oblique folds, 

 above which is a prominent fold or plate extending at almost right 

 angles to the columella ; between this and the posterior angle of the 

 aperture is a small, tooth-like projection. 



Alt. 4, diam. 2} mill. 



Three adults and two juvenile specimens in the collection of the 

 Academy of Natural Sciences of Philadelphia. 



Anchura? pergracilis n. sp. (fig. 2). 



Anchura sp. ? (young). Annual Kept. Geol. Survey N. J., 1897, page 264. 



Shell fusiform, whorls convex, the body whorl with about 18 and 

 the spiral whorls with 15 equidistant, flexuous, longitudinal ribs ; 

 numerous fine revolving lines, more prominent between 

 the ribs, and somewhat obsolete on the angles of the ribs, 

 cover the entire shell ; suture deeply impressed. The 

 length of the largest specimen (including the two apical 

 whorls, which are wanting), is about 20 mill. 



I would hesitate in describing this young shell if it 

 were possible to determine the shells of this group from the 

 figures and description of the casts that have already been 

 described. This species can always be determined, but in 

 identifying casts when the external characters are un- 

 known, there is always moie or less doubt, even when one 

 has access to the types. 



Anchura sp. ? 



This species is represented only by a fragment, the expanded por- 

 tion of the outer lip. This resembles somewhat 

 that of Anchura abrupta Conrad (Jour. Acad. 

 Natural Sciences, 2d series, IV, 284, pi. 47, fig. 1), 

 but has on the lower or anterior edge a small 

 projection or angle near the base (fig. 3), but no 

 downward projection at the end. It probably 

 represents a new species. Length of specimen, 



Tumtella quadrilira n. sp- 



Turritella quadrilira Johnson, n. sp. Annual Rept. Geol. Sur. N. J., 1897, 

 page 264, name only. 



This species closely resembles the Turritella trilira Conrad of the 



Ripley bed, but is at once distinguished by having jour instead of 



three equidistant revolving lirre; it also differs in being perfectly 



Fig. 2. 



