PLATE XLIII. 



Zone of Aegoceras Henleyi. 



A very fine old shell of Aegoceras striatum, Reinecke. Collected upwards of thirty 

 years ago near Lyme Regis. Was long in the possession of a local collector, but now 

 belongs to the Museum of the Royal School of Mines, and kindly lent by Mr. Etheridge, 

 F.R.S., for this plate. The figure is of the natural size. 



