♦ 
PLATE XXXVIIL 
Zone of Aegoceras Ibex. 
Fig. 1. Aegoceras Valdani, d'Orhigny. Lateral view, natural size. In collection of 
Mr. Charles Moore, F.G.S., Bath. 
2. — — — Front view of siphonal area do. 
3. — — — Body-chamber with aptychus in situ. My 
collection. 
4. — — — Lobes and saddles of this species magnified. 
5. ■— DENsiNODUM, Quenstedt. Lateral view, natural size, showing the 
remarkable inflated mouth-border of 
this species from near Yeovil. My 
collection. 
6. — — — Siphonal area, showing its flatness and 
the lateral position of the short spines. 
