PLATE XLII. 



Zone of Aegoceras Henleyi. 



Fig. 1. Aegoceras striatum, Reineche. Side view, natural size. My collection. 



2. — — — Side view of a smaller shell, showing 



sculpture. 



3. — — — Front view of figure 1 . 



4. — — — Siphonal area of figure 2. 



5. — — — Lobe-line, showing the extremely ramified 



lobes and saddles of this fossil. 



