42 
SPHj 3ERA corrugata. 
TAB. CCCXXXV. 
Spec. Char. ...... 
A very gibbose heavy shell, with a coarsely corrugated 
surface, rugae transverse obtuse, largest about the sides, 
and extended over the ears, nearly lost in the middle. 
Lately discovered by Professor Sedgwick in the Iron 
Sand formation, on the eastern side of Sanddown Bay, on 
the Isle of Wight, where the beds are inclined. 
