PLATE XV. 



EUOMPHALUS DeCEWI. 

 I'age 65. 

 Tig. 1. The inner volutions of a. small individual. 

 Fijf. 2. A larger specimen in cliert. 



¥\g». 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 

 Vork, these parts being usually destroyed or decollated during the more advanced stages of 

 growth, as shown in figs. 3, 4 and 5. 



E0OMPHALU8 TlOOA. 

 Page 56. 

 Figs. 9, 10. The opposite sides of a much worn and imperfect specimen. Pig. 9 shows a part of the outer 

 volution and the impression of the inner ones. Fig. U) shows the sloping, concave surface of 

 the umbilical side of the shell. 



