Review of the Neto York Geological Reports 



365 



water of the Ohio, opposite Cincinnati, has been referred to the 

 same species ; it is however most probable that it is distinct both 

 from this and the T. caractaci. 

 Fig. 6 is not so common as the preceding, but it evidently has 



W. of 4th P. M 



Wisconsin 



These are the univalves of the Trenton limestone most wor- 

 thy of note, on account of their wide range. 



3 



s - 



CO 



3 

 3 



o 



O 



2 



Plate 101 , fig. 2, Pleiirotomaria lenticularis. 3, Subulites elon- 

 gata. 6, Bellerophon hilobatus. 



v ^l. xlvii, No. 2— Juiy-Scpt 1844. 47 





