Plate VIII. 



(All the specimens are in the Collection of the Museum of Comparative 

 Zoology at Cambridge. The illustrations are slightly reduced.) 



Page. 



Figs. 1-3. Euthriofusus burdigalcnsis var. tnbcrculosus (1321, 1321, 27802).. 94 



4 and 5. Euthriofusus burdigalensis var. carinata (1319) 94 



6 and 7. Euthriofusus burdigalensis, typical ( 1322) 95 



8. Euthriofusus burdigalensis, gerontic individual (27801) 95 



9-12. Fusus semirugosus, showing variation (1226) 61 



13. Fusus clavatus var. ( 1213) 57 



14. Fusus etruscus ( 1214) 57 



15. Fusus clavatus, typical ( 1213) 57 



16. Euthriofusus burdigalensis var. major (27800), Leognon et Saucats. 95 

 17 and 18. Clavilithes (?) humerosus, Jackson, Miss. (27792) 129 



19. Clavilithes conjunctoides, type, Brockenhurst beds, England (27794) • 122 



20. Euthriofusus burdigalensis var. major (27800), Leognon et Saucats. 95 



21. Heilprinia caloosaensis {2yyggi) 87 



22. Euthriofusus burdigalensis var. major, Vienna basin (1322) 95 



(172) 



