5(3 



what resembles ; it is a]so sinooliier, nnd in many respects 

 ssifficiently difTerent never to be conl'ounded with that 

 species. 



Lately discovered by ]\Ir. G. B. Sowerby in the upper 

 marine formation at Ileadon Hill : Iragnnents have also 

 been found in other parts of the same formation upon 

 the Isle of Wight, by Prof. Sedgwick. 



