PLATE XXII. 
Ttjbbo Shumabdii. 
Page 135. 
Fig. 1. A small specimen showing the aperture, with the peristome very nearly entire, while the thickened 
columellar lip is completely preserved, 
Fig. 2. The opposite side of the same specimen^ showing the oblique nodes and the angular peripheral 
carina. 
Fig. 3. Dorsal view of a large individual, showing the elevation of the spire, and the strong oblique nodes, 
which, in some instances, invade the .peripheral carina, giving an undulating outline. 
Fig. 4. The summit of the preceding specimen, showing the volutions and the form and character of the 
nodes. 
Naticopsis compebta, n. sp. 
Fig. 5. The posterior side showing the aperture, with the peristome nearly entire. 
Fig. 6. The anterior side of the preceding shell. The specimen is from the Upper Helderberg limestone, 
and enlarged to two diameters. 
Euomphalus [Pleubonotus] Decewi. 
Pages 55 and 137. 
•Fig. 7. The upper side of the spire of a specimen of medium size. The shell is coarsely striated, and, 
with the peripheral band, well preserved on the outer volution. From the Upper Helderberg 
limestone of Ohio. Collection of Dr. J. S. Newberry. 
PlatyceBas dumosum. 
Page 14., 
Fig. 8. A very coarse, strong specimen, ‘mainly an interior cast, preserving- a few strong spines. The 
specimen is from the Schoharie grit at Schoharie—a position in which this fossil is rarely found. 
