142 Bulletin 4 256 



Explanation op Plate 8. 



(18) 



Page. 

 Fig. I. Volutilithes rugatus Con 83, 197. 



2. V. rugatus var. saffordi Gabb " " 



3. Volutilithes limopsis Con 84, 198. 



4. Volutilithes quercollis n. sp 85, 199. 



5. Lyria wilcoxia?ia Aid " " 



6. Valuta florencis n. sp 82, 196. 



Gutta-percha mould, 

 a. Internal cast. 



7. Mitra szibpontis n. sp... 86, 2,00. 



Gutta-percha mould, 

 a. Internal cast. 



8. Mitra hatchetigbeensisf Aid " " 



9. Fusus qtiercollis n. sp " " 



ID. Fzisus hubbardanus n. sp 87, 2,01. 



11. Fusus htibbardanus u. s^ " " 



12. Fusus jneyeri Aid. var " " 



13. Fusus ostrarupis Har 88, 302. 



14. Fusus {Latirus) tortilis Whitf 89, 203> 



15. Fusus mohri Aid " 



16. Strepsidtiraf mediavia n. sp 91, 305. 



Back view, 

 a. Front view. 



17. Strepsiduraf mediavia n. sp " " 



Showing columellar plaits. 



