PLATE IY. 
Euomphalus Decewi. 
Page 55. 
Fig. 1. The inner volutions of a small individual. 
Fig. 2. A larger specimen in chert. 
Figs. 3, 4 and 8. Three views of a large internal cast of the species. 
Figs. 5, 6. Two views of another internal cast. 
Fig. 7. An internal cast retaining the inner volutions—a condition seldom noticed in the rocks of New 
York, these parts being usually destroyed or decollated during- the more advanced stages of 
growth, as shown in figs. 3, 4 and 5. 
Euomphaltjs Tioga. 
Page 56. 
Figs. 9, 10. The opposite sides of a much worn and imperfect specimen. Fig. 9 shows a part of the outer 
volution and the impression of the inner ones. Fig. 10 shows the sloping, concave surface of 
the umbilical side of the shell. 
