96 PALEONTOLOGY OF NEW JERSEY. 
ture rather large, obliquely elliptical with the outer side more rounded than 
the inner; acute above and apparently so below; outer lip strongly erenu- 
late within; inner lip coated with a deposit, but not sufficiently heavy to 
conceal the surface markings of the shell beneath it, which show through 
and present somewhat the appearance of plaits; axis apparently slightly 
perforated; surface marked by strong and deep vertical and spiral grooves 
with sharp ridges between, which produce aspirate nodes by their. intersec- 
tion; eleven or twelve of the longitudinal ridges may be counted on the 
inner half of the last volution and six of the spiral ridges above the top of 
the aperture. The upper two or three volutions appear to have been 
smooth, or nearly so, as originally described.» 
The type and only specimen which I have seen of this species has 
been much mutilated, and that apparently since Mr. Conrad’s figure and 
description of it were made. The spire has been broken and the upper 
three volutions thrust down and into the cavity of the lower ones, so they 
can be only partially seen. The apertwre—at least the outer lip of it—has 
also been somewhat damaged so that the crenulations on the inside are 
scarcely seen. The feature described by Mr. Conrad as “labrum angulated 
above the middle” is barely perceptible on the specimen, which is half 
imbedded in micaceous clays. It appears to me to be a feature produced 
by accidental crushing rather than a natural one, especially as there is not 
the slightest evidence of any angulation on the opposite side of the body 
volution or above; the base, however, seems to have been either angulated 
or channeled, but the conditions of the specimen will not allow of abso- 
lute determination of this feature. If this shell really belongs to the Cancel- 
laviide, it would, I think, properly fall under the genus Mercia H. and A. 
Adams, and specifically is near M. (C.) oblonga Kiener, as figured by Chenu. 
In some respects, however, the specimen closely resembles a Nassa like N. 
(Tritia) trivittata of our own coast. The figure as given is restored as well 
as it is possible to be done, the fragments being replaced as far as can be. 
Formation and locality: In dark colored micaceous clays below the 
Lower Marls at Haddonfield, New Jersey. Collection Acad. Nat. Sci., 
Phila. 
‘Manuel de Conch, Paléont., vol, 2, p. 277, Fig. 1847. 
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