PLATE XXXV. 



PAGE 



fig. 1. Ammonites Pedernalis. Natural size. 258 



1 a. Cross section showing the peculiar form of the dorsum. 



Fig. 2. Fusus Mexicanus. Magnified. 259 



Fig. 3. Lunatia Pedernalis. Natural size. 259 



Fig. 4. Euspira tabulata. Natural size. 260 



Fig. 5. Chemnitzia zebra. Natural size. 260 



Showing the colored markings on the surface. 



Fig. 6. Tylostoma mutabilis. Natural size. 261 



6 a. Magnified front view of a small specimen, showing the crenulated 

 outer lip. 



6 b. Top view of the same. 



6 c. Top view of an unusually large and rough specimen. 



Fig. 7. Anchura monilifera. Magnified. 262 



Fig. 8. Cerithium Mexicanum. Magnified. 263 



Fig. 9. Angaria cingulata. Natural size. 264 



Fig. 10. 10 a. Cinulia rectilabrum. Magnified. 264 



