GASTEROPODA OF THE LOWER GREEN MARLS. 115 
Formation and locality: The specimen is evidently from the Lower 
Green Marls, although the locality indicated is only “Cretaceous, N. J.” 
Collection Acad. Nat. Sci., Phila. 
ANCHURA PENNATA.— 
Plate xiv, Figs. 7, 8. 
Rostellaria pennata Morton: Synop., Org. Rem. Cret., p. 48, Pl. xrx, Fig. 9. 
Gladius pennatus (Mort.) Gabb: Synopsis, pp. 54, 77. 
Rostellaria (2) pennata (Mort.) Meek: Check List Cret. and Jur. Fogs., p. 20. 
Anchura pennata (Mort.) Meek: Geol. N. J., Newark, 1868, p. 729. 
Shell elongate, spire elevated and consisting of from six to seven volu- 
tions, which are only moderately convex between the suture lines, the 
latter being well marked but not deep; apical angle not more than 30°, 
but often less; last volution proportionally large and with a somewhat 
extended rostral beak, slender and straight; lip broadly expanded and 
extended in a narrow border along the side of the beak to a point opposite 
the base or swell of the volution, where it rapidly widens out into the broad 
wing-like lip, which reaches somewhat over the next volution above but 
apparently not forming a posterior canal. The outer posterior angle of the 
expanded portion is prolonged into a narrow, recurved, falciform process 
of greater or less extent; volutions marked by oblique longitudinal folds, 
which extend from suture to suture on all the upper volutions, but become 
obsolete just above the middle on the body portion of the last one, and are 
entirely obsolete on the back of the expanded lip. On the upper volutions 
the folds are closely arranged, but on the lower they are more distant and 
more strongly marked, while on the body part of the last one they are 
quite strong and almost node-like, even on many of the internal casts. 
The species was originally described from casts obtained from Prairie 
Bluff, Alabama, where they appear to be not uncommon as casts, and the 
New Jersey specimens are usually in the same state of preservation, and 
seldom show any remains of the expanded lip. In some of the marls, 
however, this feature is occasionally preserved, and I have before me three 
individuals belonging to the collection at Rutgers College showing this 
feature with some slight variations. One individual apparently has the lip 
