GASTEROPODA OP THE LOWER GEEEN MARLS. 157 



gentlemen, however, disclaim the responsibility of the name, and as none 

 such appear in any of their works, we can only conclude that Mr. Gabb 

 was in some way confused, as suggested by Mr. Meek in his Invert. Pa- 

 leont. of the Territories, that Mr. Gabb intended to refer it to A. attenuata; 

 but it certainly is a very distinct species and can never have had so ele- 

 vated a spire as that one. As the name A. biplicata has been previously 

 used by D'Orbigny for a very distinct species, and as this one appears to 

 be a true Actceon, I see no way to avoid a change of name in this case, 

 and therefore propose the name Actceon Gabbana as a substitute for that 

 used by Mr. Gabb. 



Formation and locality: In the Lower Green Marls. The specimen is 

 labeled "Tinton Falls, New Jersey," and is from a green marl, and may 

 have come from below the middle marl bed at that place. In the col- 

 lection Acad. Nat. Sci., Phila. 



Action Forbesiana, n. sp 



Plate XIX, Figs. 17-33. 



Tornatella. Lyell and Forbes: Quart. Jour. Geol. Soc, London, vol. 1, 1846, p. 63, 

 Fig. c. 



Shell of about a medium size for the genus, broadly ovate or ovoid 

 in outline, spire short, obtusely rounded, middle portion of the shell sub- 

 cylindrical and the base obtusely pointed, having nearly the same angle 

 as that of the spire. Volutions from four to five in number, closely coiled 

 and rising but slightly one above another; body volution very slightly 

 chamfered just below the suture, presenting an almost imperceptible angle 

 a little below the suture, below which it is nearly cylindrical, to below 

 the middle of its length, and obtusely pointed at the lower extremity. 

 Aperture two-thirds the length of the shell, and considerably longer than 

 the diameter of the body volution, very narrow at the upper part, but 

 gradually widening below, rounded in front. Columella comparatively 

 strong, bearing a single oblique ridge near the middle of its length, and 

 having the margin thickened below it, and around the base of the aper- 

 ture, as seen by the impression of these features on the internal casts. 

 Surface of the casts marked by rather fine, closely arranged, spiral lines, 



