PLATE LX. 
Fig. l. 
Fig:. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Nautilus bucinum. 
Page 412. 
See Plates 106, 107, 109. 
The dorsal side of a specimen which preserves the inner volutions, and shows the wide aperture. 
The same specimen, with the inner volution removed, showing the form of transverse section, posi¬ 
tion of siphuncle, and surface-markings. 
A lateral view of the preceding specimen. From the Goniatite limestone, near Manlius, N. Y. 
A dorsal view of a larger individual, showing the form of aperture and section of the inner volutions. 
. Several of the air-chambers are broken away, and the position of the siphuncle is shown on the 
convex and concave surfaces of the septa. Near Solsville, Madison county, N. Y. 
• Nautilus cornulum. 
Page 414. 
A ventral view of the specimen, showing the more circular form of section and of the aperture. 
A lateral view of the preceding specimen, showing the suture lines of the chambered portion of the 
shell, and the undulating strise of growth over the surface of the grand chamber. Near Caze- 
novia, N. Y. 
Gomphoceras -sp. 
A lateral view of a fragment, showing a moderate degree of curvature and preserving eight air- 
chambers, with the base of the chamber of habitation. Shore of Skaneateles lake, N. Y. 
Nautilus liratus. 
Page 407. 
See Plate 57. 
A figure of a gutta-percha impression, from the mould left in the matrix by the specimen fig. 9, 
showing the strong revolving plications and the obscure annulations near the apex. 
A specimen preserving the greater part of the chambered portion of the shell in its natural propor¬ 
tions. Several low, transverse undulations are shown toward the apex, and the septal lines 
are visible beneath the partially exfoliated shell. The revolving plications, which are very 
prominent near the apex, and are continuous on the concave dorsal side, become obsolete on 
the ventral side as they approach the chamber of habitation. Prom the Goniatite limestone. 
Schoharie, N. Y. 
