PLATE XXII. 



Bellerophon ccrvilineatus. 



I'age 04. 

 Hg. 1. Lateral view of a small specimen retaining the shell and surface-marking-. 

 Figs. 2, 3. Lateral and jM-olile views of a large, perfect specimen, showing the form and sui-face-markings ; 



proliably the original of Mr. Conrad's description. 

 VSg. 4. A large specimen somewhat compressed, showing strong wrinkles near the aperture. 

 fig. 5. Lateral view of a sjiecinien of large size, the shell being j)rincipally exfoliated. 

 Kg. 6. An internal cast of a specimen, not compressed. 



Bellerophon Pelops. 



I'age 95. 

 . Figs. 7, 8. Dorsal and lafei-al 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. Latei-al view^ of the specimen fig. 10- , , , „ . 



Bellerophon Pelops var. exponens. 



Page Si6. 

 Fig. 14. Lateral view of a cast showing the inner volutions. 



Bellerophon Newberryi. 



I'ugi! 97. . 



Fig. 15. Dorsal view of a specimen enlarged two diametera. 



Fig. 16. The aperture of the preceding specimen ; the outer lip is broken off, and there is no niesjal band, 

 the striae bending backwai-d on the middle of the shell as in B. patulus. 



Bellerophon patultjs. 



Page 100. 

 Fig. 17. Dorsal view of a symmetrical specimen, marked by fine strisB on the smaller part of the outer 



volution, and with some strong undulations on the exjianded portion. 

 Fig. 18. A sjiecimen slightly marked by the arching stris and showing several distinct undulations on the 



expanded part of the lip. 

 Fig. 19. A nearly entire individual presenting the usual characters. The specimen is somewhat distorted. 

 Fig. 20. A small portion of the outer volution of a specimen, shovtring the strong undulating striffi with a few 



finer radiating lines. 

 Fig. 21. A small specimen with very strong, transverse arching strioe, the lip only partially developed. 

 Rg. 22. Doi-sal side of an imjierfect specimen, showing the lateral expansions of the columellar lip and the 



deep sinus in the centre. 

 Fig. 23. Dorsal view of a specimen where the pustulose lip is less extended. 

 Fig. 24. Lateral view of a specimen scarcely compressed. 

 Fig. 25. Lateral view of a specimen from hard limestone. 

 Fig. 26. The specimen fig. 17, with the smaller part of the volution removed, showing the callus of the inner 



lip beneath. 

 Fig. 27. Interior view of a large specimen, showing the pustulose callus covering a portion of the volution. 

 Fig. 28. The interior of the apertui-e, showing the pustulose callus nearly covering the pi-eceding volution. 

 Fig. 29. Venti-al side of the specimen fig. 23, showing the thickened columellar lip, with the central pustulose 



portion elevated above the sides. 

 Fig. 30. 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.) 



