176 
Fig. 4 is taken from a fragment of an analogous shell, 
too imperfect to draw up a specific character from, but 
evidently differing in the great size and angular form of 
the longitudinal ridges ; it is a cast in clay coated with 
Pyrites, and was found with Ammonites in the blue 
Bind between the Inver Brora Coal and the coarse 
Limestone above it near Clyne in Sutherland, by Mr* 
Farey, Senior. 
