PLATE XXTir. 



Bellerophon Lyra, 



Page 113. • 



Vig. 1. Doi-sal view of an impei-fect cast. 



Bellerophon Leda. 



Pase 110. 

 Fig. 2. The interior of a specimen lying in the rock, showing' the foi-m of the inner lip. 

 Fig. 3. Lateral view of a specimen similar to the last. 



Fig. 4. A jiortion of the venti-al side of a specimen, showing a pustulose columellar lij>. 

 Fig. 5. A large sjiecimen having the two sets of striffi nearly equal in strength. 

 Fig. 6. A s|)ecimen enlarged to two diametei-s, showing sti'ong transvei-se markings. 

 Fig. 7. A further enlargement of the right side of the lip, showing the surface charactei-s. 

 Fig. 8. An enlargement of the surface, showing the character of tVie medial band and lateral atriee. 

 Fig. 9. A specimen enlai-ged to two diametei-s. showing the transverae lines entirely subordinate. 

 Kg. 10. A further enlargement of one side of the specimen fig. 9. 



Fig. 11. A specimen enlargp<l to two diameters, showing still strongei- concentric markings than in fig. 6; 

 Fig. 12. Enlargement to one and a half diametei-s of a specimen where the revolving lines are coale.scent 



and less strong on the hody than on the expanded poi'tion ; becoming almost obsolete near the 



margin. 

 Fig. 13. A still gi-eater enlai-gement of the last. 

 Fig. 14. A sj>erimen with revolving lines very strongly marked, which become prominent and irregular 



on the expanded portion. 

 Fig. 15. Enlargement to two diametei-s of a portion of the specimen fig. 14, showing the characteristic 



features moi-e distinctly. 

 Fig. 16. The body-vtilution of an imperfect specimen, enlarged to two diameters, showing nearly equal 



cancellating strise. 



.- Bellerophon Lyra. 



I'agc 113. 

 Fig. 17. Tlie anterior expansion of the last volution, natural size. 



Fig. 18. A somewhat compressed specimen enlarged to two diametei-s, showing the sui-face-mai-kings. 

 Fig. 19. A very symmetrical specimen enlarged to two diameters, showing the sui-face chai-actei'H and 



distant arcViing laminae crossing the naiTOw, rounded doreal band. 

 Fig. 20. A further enlargem(!nt of a part of the specimen fig. 19. 



