PLATE XLVI. 



Zone of Amaltheus oxynotus. 



Fig. 1. Amaltheus Lymensis, Wright. Side view, natural size. My collection. 



2. — — — Front view of the same fossil. 



3. — — Lobe-line with lobes and saddles enlarged, 



from a tracing of the fossil. 



4. oxynotus, Quenstedt. Side view, natural size. My collection. 



5. — Front view, natural size, same shell. 



6. — — Lobe-line with lobes and saddles enlarged, 



from a tracing of the fossil. 



