GASTEROPODA OF THE LOWEE GREEN MARLS. 71 



Genus VOLUTOMORPHA Gabb. 



VOLUTOMORPHA CONRADI. 



Plate VI, Fig. 21; Plate vii, Figs. 1-3 and 4, 5?. 



Rostellites Conradi (Gabb) Meek: Check List Cret. and Jur. Foss., p. 21; Geol. 



N. J., Newark, 1868, p. 730. 

 Fulguraria Conradi Gabb: Proc. Acad. Nat. Sci., Phila., 1861, p. 364. 

 Volidilithes Conradi Gabb: Jour. Acad. Nat. Sci., Phila., vol. 4, p. 300, PI. XLViii, 



Fig. 10 ; Synopsis, p. 93. 

 Volutomorpha Conradi Gabb: Proc. Acad. Nat. Sci., Phila., 1876, pp. 290, 293; 



Struct, and Syst. Conch., Tryon, vol. 2, p. 166. 



Shell large, some specimens apparently attaining a length of 4J inches, 

 with a diameter of the largest volution of rather more than 1 J inches; spire 

 short, or only moderately elevated, although the general form of the shell 

 is somewhat slender, the body volution, as viewed on the the apertural side, 

 forms fully four-fifths of the entire length, even in the condition of internal 

 casts; upper volutions compact, convex on the sides, and rather squarish or 

 suddenly rounded to the suture on the top ; body volution very large and 

 very gracefully swollen or convex in the upper part, and prolonged and 

 attenuated below, forming a long, gracefully tapered anterior beak with the 

 columella slightly twisted; top of the volution rather suddenly contracted 

 to the suture; aperture large, very elongate-elliptical in outline and pro- 

 longed below, where it becomes narrowed as the outer lip approaches the 

 axis; columella slightly twisted and marked by from one to three very 

 oblique folds, the middle one of which is usually the strongest; surface of 

 the casts usually smooth, with the exception of, in some cases only, a few 

 distant vertical folds on the upper ones, and on the extreme upper part of 

 the body volution; but where the external features are preserved, the 

 whole shell is marked by strong, rounded, vertical folds, and but little less 

 strongly marked, rounded, spiral ridges; the spiral ridges moderately dis- 

 tant on the upper part of the volution, but becoming less strongly marked 

 and crowded, and finally almost obsolete, toward the base. 



I have before me a large number of the internal casts of this species, 

 mostly imperfect; the original of Mr. Gabb's figure and description being 



