11, 12. 
13, 14. 
15, 16. 
17. 
18, 19. 
20. 
302 
EXPLANATION OF PLATE II. 
PYROPSIS RETIFER Gabb (p. 38). 
. Opposite views of a specimen of typical form. 
. Two views of a larger specimen less like the type, and witb fainter markings. 
P)\ROPSIS NATICOIDES Whitf (p. 43). 
PYROPSIS OCTOLI! ATA Conrad (p. 36). 
. Two views of a large cast of typical form. 
. View of another individual showing the extension of the anterior beak. 
PYROPSIS REILEYI Whitf (p. 42). 
Two views of a small cast from Holmdel, New Jersey, from white clays. 
Two views of a cast showing faint spiral lines, and also the columellar pits. 
Two views of another cast which is entirely smooth. 
. Three views of the type, showing the Naticoid form. Collection Acad. Nat. Sci., Phila. 
View of the aperture of a specimen which retains a part of the shell and shows the 
markings. 
Two views of a cast from an ironstone nodule where the anterior beak is preserved. 
Impression taken in the matrix of the same specimen showing surface features, 
Key Port, New Jersey. 
Near 
