PLATE XL. 
Zone of Aegoceras Jamesoni. 
Fig. L Aegoceras ta»OLYMORPHUM, Quenstedt?j Lateral view, magnified two diameters. 
In the collection of the Rev. J. E. 
Cross, F.G.S. 
2. — — — Siphonal area, front view do. 
3. — — — Simple lobe-line of this form do. 
Zone of Aegoceras Ibew. 
4. Phylloceras L0SCOMBI5 /Sb?/^. Lateral view, natural size. My collection. Prom 
Charmouth, Dorset. 
5. — — — Front view of siphonal area do. 
