PLATE 8. 



Page. 

 Fig. 1. Ammonites ? ? Mullaxanus. (See Appendix.) 



1, a. A profile view of the type-specimen, consisting of au internal cast of a part of the sep- 

 tate turns, showing the rounded periphery and the form of the aperture as indicated 

 by a section of one of the volutions. 

 1, b. A side view of the same specimen. 



1, c. A septum of the same, magnified oue and a half diameters. [First lateral lobe sometimes 



more nearly bipartite.] 

 Fig. 2. Nautilus elegans 4'J'J 



2, a. An aperture view of a partly exfoliated specimen, with the lip all broken away. 

 '2, b. A peripheral view of the same. 



2, c. A side view of same. 



