188 
NAUTILUS striatus. 
TAB. CLXXXIE. 
Spec. Cuar. Slightly depressed ; umbilicate ; con 
eentrically striated ; aperture half the diameter 
ef the shell, nearly orbicular. 
WV norts rather gibbose, they are few, and increase 
rapidly ; the umbilicus is large, expesing a small part of 
the inner whorls ; the numezous. strme which cover the 
surface are irregular, elevated, and so strong, that trey 
might almost be considered as ridges ; the front is a little 
compressed, giving the apertare a squarish form. 
Found in the blue Lyas at Lyme Regis, Dorset. 
The large fragment was tent me by the Rev. W. Buck- 
land. 
