The A.mekican Geologist, Vol. XXX. 
Plate XVII. 
Desckiption of Figures. 1. — Euomphalus springvalensis White, in .sec- 
tion. 2. — Euomphalus 'axus White, in section. 3. — Loxonema difficile n. sp., 
the lower part restored from another specimen. 4.— Section of a smaller 
specimen of the same. 5. — Macrodon cf. cochlearis Winchell. 6. — Myalina 
abstemia n. sp. All figures are natural size. 
