PLATE XIV. 



LOXONEMA DELPHICOLA, 



Pajre 47. 



Fijr. 1. A Urge compressed specimen, marked by tine striae, and showing' a distinct sutural band. Hamilton 



shides, near Ilelloiia, N. Y. 

 ¥ig. 2. A 8i)ecinieu frt)m the same locality having the last volution greatly eximnded, with fine markings, 

 while the upj)er i»art is more coarsely toarked. The sutural band is unusually wide. The 

 apparent distortion is mainly a condition of growth, and not accidental. 



It may be questionable whether the existence of a sutural band is of sjiecific importance, and 

 the degree of development of this feature in diflerent individuals suggests a doubt as to the 

 reliance of this chai"acter for sj)ecific distinction between L.Hamiltmiias and L. delphicola. 



LoXONEMA BeLLONA. 

 Page 46. 

 Fig. 3. A specimen which is mostly denuded of the shell, but showing the form of the volutions. A small 

 fragment of shell on the body-volution exhibits the surface-marking as indicated in the figure. 

 Figs. 4, 5. Two fragments showing the form of volution and surface-markings. 



LoXONEMA TEREBRA. 

 Page 48. 

 I^gs. 6, 7. Gutta-percha casts in the natural mold, giving the foi-m of the shell and the surface-markings. 



LoXONEMA STYLIOLA. 

 Page 48. 

 Figs. 8, 9. Gutta-])ercha casts, showing the long' subulate spire. 



Callonema bellatula. 



Page 51. 

 Fig. 10. A small specimen with angular volutions. 

 Figs. 11, 12. The opposite sides of a medium-sized specimen, having the angular form and showing the 



umbilicus. 

 Fig. 13. A lai'ger specimen with i-ounded volutions. 



F'ig. 14. A still larger specimen, showing the angularity of the volutions somewhat modified. 

 Fig. 15. A large i-otund sjiecimen referred to this species. From the Upper Helderberg limestone near 



Louisville, Kentucky ; the preceding specimens from Dublin, Ohio. 



Callone.ma imitator. 



I'age 53. 

 Fig. 16. The upijei- sm-face of the shell, showing the form of the volutions and the surface-marking. 

 Fig. 17. Lateral view of a specimen showing the elevation of the spii-e and form of volutions. 



