PLATE XXVI. 



Bellebophon Pelops. 



I'aso 98. 

 Vig. 1. Lateral view of a partial cast of a specimen from the Upper Helderberg' limestone, at Dublin, Ohio, 

 :=: B. propiitqua of F. B. Mkuk. 



Bellerophon Newbereyi. 



I'agu 97. 

 Vig. 3. A sjMJcimen presening' the delicate doi-sal band. 



V%g. 2a. An enlargement showing the doi-sal band, and the ti-ansverse and revolving striee. 

 Vig. 3. A s|ieciMieii in which moderate wearing- or exfoliation has obliterated the marks of the dorsal band, 

 while the transvei-se stria; ai-e still well preserved. 



Bellebophon hyalina. 



Page 99. 

 Fig. 4. An imperfect specimen, natural size. 



Bellerophon brevilineatus. 



Page 107. 

 Fig. 5. An imjierfect specimen in which the striie are continued from the umbilicus over the sides of the 



shell, without interruption. 

 Fig. 6. An imiK'rfect specimen where the stria are interrupted on the middle of the side of the volution. 



This and the pi-eceding are enlarged. 

 Fig. 7. A copy of the figui-e given by Mr. Conkad, ut. cit. page 107. 



Bellerophon rotalinea. 



Page 115. 

 Fig. 8. A lateral view, showing distinct revolving stiice, with faint indications of ci-enulations. 



Bellerophon repebtus, n. sp. 



Fig. 9. A dorso-latei-al view, showing the depressed mesial baud and the evenly cancellating striae of the 

 extenor sui-face. 



Bellerophon patulus. 



Page 100. 

 Fig. 10. A longitudinal section along the median line, showing an extreme thickening of the colnmellar lip. 

 Fig. 11. A section of a specimen where the thickened columella is moi-e extreme and slightly ditlerent in 



foj-m and extent. The substance ha* become crystalline. 

 Fig. 12. An enlargement of the doi-so-lateral portion of a specimen where the sui-face shows evidence of 



revolving stria, which ai-e presei-ved in the furrows between the transverse strise. 



Bellebophon aoctilira. 



Page 10«. • 



Fig. 13. An enlargement of the surface, showing the acutely arching stri« near the apex of the last volution, 

 and the broader curving of the same near the apertui-e. 



Bellerophon explanattts. 



Pago 109. 

 Fig. 14. The dorsal side of the last volution, showing the broad expansion of the peristome and its extension 

 posteriorly. 



