94 PALEONTOLOGY OP NEW JERSEY. 



flattened in tlie direction of tlie spire, or very little con^'ex on the surface, 

 and bordered on the lower margins in the cast h\ a distinct band, which 

 forms about one-third of the height; body volution proportionally rather 

 more convex in the middle than the others and constricted below, forming a 

 heak of moderate length; the height (if this volution as seen from the back 

 of the outer lip forms, with the beak, rather more than one-half of the 

 entire length of the shell; shell marked throughout by distinct vertical 

 ridges (ir folds, more numerous and more closely arranged on the body 

 whorl than on those above, except perhaps the apical ones, and have a slight 

 backward curvature in the middle in passing from suture to suture; the 

 shell also marked by spiral ridges which, on the body volution, are of nearly 

 equal strength with the vertical folds, but are invisible on the other volu- 

 tions in the specimens used. 



This shell has the same general character as T. Belleiji-, but is much 

 less slender and has a proportionally shorter spire; while the surface mark- 

 ings are coarser than on that one and the volutions are less numerous. 

 There is a peculiar feature pertaining to the band bordering the sutures in 

 these two species, which may be deceptive in its appearance. In shells of 

 this group there is often a thickened band of this kind at the upper edge of 

 the volutions, but here it seems to be at the lower edge, and in separating 

 the volutions of the casts, which I have done in order to ascertain the truth, 

 they separate at the lower edge of the band. As the specimens are, how- 

 ever, more properly external than internal casts, preserving the external 

 markings of the shell, the thickening of the band at the top of the volution 

 which would contain more substance may have made its imprint in the 

 external substance of the mati-ix, which would have been filled up from 

 within, thereb}' leaving its mark upon the cast at the base of the preceding 

 volution, instead of on that to which it really belonged. 1 see no other 

 means of explaining this feature, for if the band really belonged to the volu- 

 tion on which it appears, there should be a corresponding band on the body 

 of the last volution, which is not the ease. 



Formafio)!. and locality: In coarse, dark colored Green Marls of the 

 Lower Beds at Freehold, New Jersey, in collections made by the late Rev. 

 Dr. Reiley of that place. 



