48 FIFTEENTH REPORT ON THE CABINET OF NAT. HISTORY. 



two or three are visible on the upper volutions, and about five 

 on the body-whorl ; those on the upper side of the volution more 

 distant than those on the lower side. 



The larger specimens are about an inch in diameter, with a height 

 about one-fourth greater. 



Geological formation and locality. In the coarse sandy shales of the 

 Hamilton group, in Chenango county, N.Y. 



CYCLONEMA MULTILIRA ( n. s.). ^ ^^ '1 

 Shell turbinate, ventricose. Volutions five or more : body-whorl 



very large and extremely ventricose. 

 Surface marked by fine concentric strise of growth, which are 

 directed backwards from the suture towards the periphery, and 

 pass to the lower side of the volution without deviation, except 

 in the slight undulation at the crossing of the revolving lines. 

 The surface of the volutions is marked by strong elevated re- 

 volving lines, of which there are about five or six upon the upper 

 volutions, and ten or twelve on the body-whorl : the space from 

 the suture to the upper of tliese lines is greater than between 

 the lines, those of the periphery being more closely arranged than 

 those above or below. 



This species is similar in form to C. lirata^ with the last volution more 

 ventricose and all the volutions less angular ; and the revolving carinate 

 lines are twice as numerous and not so strong. It is intermediate between 

 the C. hamiltonios and C lirata; being a little more ventricose than either, 

 without the flattened or concave band on the upper side of the volution. 



Geological formation and locality. In the coarse shales of the Hamilton 

 group at Smyrna, Chenango county, N.Y. 



^^v/ 



MACROCHEILUS HEBE (n.s.) ^ ■ V J 

 Shell turreted, sub fusiform; length less than twice the diameter. 

 Volutions nine, upper ones minute, the last two ventricose; one- 

 half the height of each volution showing above the suture. Shell 

 thick on all parts, and more extremely so near the aperture. 

 Aperture longitudinally suboval, somewhat pointed below. Sur- 

 face marked by extremely fine lines of growth. Height a little 

 more than three-fourths of an inch. 



[ August, 



