EXPLANATION OF PLATE II. 



Pyropsis RETiFEii Gabb (p. 38). 



Fuis. 1,2. Opposite views of a specimen of typical form. 



3, 4. Two views of a larger specimen less like the type, and with fainter markings. 



P>ROPSlS NATICOIDES Whitf (p. 43). 



5-7. Three views of the type, showing the Naticoid form. Collection Acad. Nat. Sci., Phila. 

 Pyropsis octoi.ii ata Conrad (p. 36). 



8, 9. Two views of a large cast of typical form. 

 10. View of another individual showing the extension of the anterior beak. 



Pyropsis Eeileyi Whitf (p. 42). 



11, 12. Two views of a small cast from Holmdel, New Jersey, from white clays. 

 13, 14. Two views of a cast showing faint spiral lines, and also the oolumellar pits. 

 15, 16. Two views of another cast which is entirely smooth. 



17. View of the aperture of a specimen which retains a part of the shell and shows the 

 markings. 

 18,19. Two views of a cast from an ironstone uodule where the anterior beak is preserved. 



20. Impression taken in the matrix of the same specimen showing surface features. Near 



Key Port, New Jersey. 

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