PLATE XIII. 
Bellerophon curvilineatus. 
Page 94. 
Jig. 1. Lateral view of a small specimen retaining the shell and surface-marking. 
Figs. 2, 3. Lateral and protile views of a large, perfect specimen, shoeing the form and surface-markings; 
probably the original of Mr. Conrad’s description. 
Fig. 4. A large specimen somewhat compressed, showing- strong wrinkles near the aperture. 
Fig. 5. Lateral view of a specimen of large size, the shell being principally exfoliated. 
Fig. 6. An internal cast of a specimen, not compressed. 
Bellerophon Pelops. 
Page 95. 
Figs. 7, 8. Dorsal and lateral views of a specimen enlarged. 
Fig. 9. Partial view of the aperture of a specimen enlarged two diameters. 
Fig. 10. Dorsal view of a cast. 
Fig. 11. Dorsal view of a smaller cast;. 
Fig. 12. Lateral view of the specimen fig. 11. 
Fig. 13. Lateral view of the specimen fig. 10. 
Fig. 14. 
Fig. 15. 
Fig. 16. 
Fig. 
17. 
Fig. 
18. 
Fig. 
19. 
Fig. 
20. 
Fig. 
21. 
Fig. 
22. 
Fig. 
23. 
Fig. 
24. 
Fig. 
25. 
Fig. 
26. 
Fig. 
27. 
Fig. 
28. 
Fig. 
29. 
Fig. 
30. 
Bellerophon Pelops var. exponens. 
Page 96. ] 
Lateral view of a cast showing the. inner volutions. 
Bellerophon Newberryi. 
Page97. 
Dorsal view of a specimen enlarged two diameters. 
The aperture of the preceding specimen; the outer lip is broken off, and there is no mesial band, 
the striae bending backward on the middle of the shell as in B. patulus. 
Bellerophon patulxjs. 
Page 100. 
Dorsal view of a symmetrical specimen; marked by fin'e striae on the smaller part “of the outer 
volution, and with some strong undulations on the expanded portion. 
A specimen slightly marked by the arching striae and showing several distinct undulations on the 
expanded part of the lip. 
A nearly entire individual presenting the usual characters. The specimen is somewhat distorted. 
A small portion of the outer volution of a specimen, showing the strong undulating striae with a few 
finer radiating lines. 
A small specimen with very strong, transverse arching striae, the lip only partially developed. 
Dorsal side of an imperfect specimen, showing the lateral expansions of the columellar lip and the 
deep sinus in the centre. 
Dorsal view of a specimen where the pustulose lip is less extended. 
Lateral view of a specimen scarcely compressed. 
Lateral view of a specimen from hard limestone. 
The specimen fig. 17, with the smaller part of the volution removed, showing the callus of the inner 
lip beneath. 
Interior view of a large specimen, showing the pustulose callus covering a portion of the volution. 
The interior of the aperture, showing the pustulose callus nearly covering the preceding volution. 
Ventral side of the specimen fig. 23, showing the thickened columellar lip, with the central pustulose 
portion elevated above the sides. 
A longitudinal section through the median line, showing the inner volutions and the extent of the 
thickened lip. (See, also, figures 10, 11, plate 26.) 
