PLATE II. 



Fig. Page. 



1. Nautilus truncatus (J. Sowerby). — Midland Railway Pit, Bedford. In 



the British Museum (no. C. 5077) ; f natural size. 



1 a, side view ; 1 b, section across body chamber ; 1 c, running of 



suture over periphery. 34 



2. Nautilus truncatus (J. Sowerby) ; young. — Rushden. In the British 



Museum (no. C. 3473). 34 



