GASTEROPODA OP THE EOCENE MAELS. 229 



spiral striae, which is not one of Onustus, but a common one of the other 

 genus, while the figure given by the author most nearly resembles a speci- 

 men of Architectonica. The species as known from the casts may be char- 

 acterized as follows: Broad conical, the surface of the volutions flattened 

 in the direction of the spire, about five in number, flattened below and 

 acutely angular on the edge. Under surface of the shell very broadly 

 umbilicate, apparently exposing all the volutions in the cavity, their inner 

 margin rapidly sloping and giving to the whorl an irregular quadrangular 

 section. Surface of the cast itiarked by several spiral lines, and in some 

 cases the outer one bordered by a distinct elevated marginal band; under 

 surface marked by distinct transverse lines which combine near the inner 

 edge to form a series of somewhat transverse nodes along the margin. 



The upper surface appears to have been granulose, judging from many 

 of the casts and imprints of the surface, which leaves one strongly impressed 

 with the feeling that the shells which made them were specifically identical 

 with Architectonica (Solarium) elaborata Conrad, from the sands of Clai- 

 borne, Alabama. I can not, however, find any evidence of spiral lines on 

 the base of the volutions, and the umbilicus has been very much larger in 

 proportion, being about half the width of the shell, whereas in that one it 

 is only about one-third of the whole width. 



Formation and locality: In the upper layer of the Upper Green Marls, 

 at Shark River, and Farmingdale, New Jersey. Collections at Rutgers 

 College and Am. Mus. Nat. Hist. 



SCALARIID^. 

 Genus SCALARIA Lamarck. 



SCALARIA TENUILIRATA, n. Sp. 



Plate XXXIV, Figs. 10-12. 



Shell above a medium size, reaching If inches in length in the best 

 preserved matrix examined. Spire elevated, the apical angle measuring less 

 than 30°. Whorls ten or more in the perfect shell, eight showing in the matrix 



