464 Thirty-fifth Be port on the State Museum. 



COLEOPHYLLUM PYRIFORME, )l. sp. 



Oorallum obliquely turbinate, curved, regularly enlarging from the 

 apex; calyx of moderate depth, oblique, much shallower at the poste- 

 rior side ; the invaginated tabulae closely arranged, and marked by a 

 fossette on the posterior side; rays fine, converging and fasciculating 

 toward the fossette, the rays on the posterior side having a coarser 

 aspect. Exterior marked by longitudinal striae, and on the convex 

 side by distinct annulations. 



This species has a neat symmetrical form, with broad elliptical 

 calyx. The specimens are silicified, and on that account the parts 

 are not so clearly defined. 



Formation and locality. — Corniferous limestone, Falls of the Ohio. 



Other species of this genus are known in the Upper Helderberg 

 limestone, in the State of New York. 



V 





