GASTEROPODA OF THE LOWEK GEEEN MAKLS. 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. Oret. , p. 48, PI. xix, Fig. 9. 

 Gladius pennatus (Mort.) Gabb: Synopsis, pp. 55, 77. 



Rostellaria {?) pennata (Mort.) Meek: Check List Cret. and Jur. Foss., 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 sjjecimens 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 

 featxire with some slight variations. One individual apparently has the lip 



