6 PALEONTOLOGY OF NEW YORK. 



Lower Helderberg group (Tentaculite limestone). Clarksville, Albany county; 

 Schoharie, Schoharie county, and Jerusalem Hill, Herkimer county. 



Tentaculites elongatus. 



PLATE CXIV, FIG. 14. 



igatus, Hall. Pal N. Y., vol. 3, p. 136, pi. vi, figs. 16-21. 1859. 



Lower Helderberg group. Schoharie, Schoharie county. 



Tentaculites acula, n. sp. 



PLATE CXIV, FIGS. 15-17. 



Tins species is distinguished by the regular, equidistant annuli and the few 

 ambulations on the intervals. 



Lower Helderberg group. Port Jervis, Orange county. 



Tentaculites Dexitiiea, n. sp. 



PLATE CXIV, FIG^ 18, 19. 

 Tentaculites scalariformis (parthn). Hall. Pal. N. V., vol. v, pt. ii, p HIT. is7:>. 



This species is distinguished from the T. scalariformis occurring in the Upper 

 Helderberg limestone by its more elongate and slender form, and more sloping 

 annuli. 



Schoharie grit, Pendleton, Indiana. 



Tentaculites scalariformis. 



PLATE (XIV, FIG. 20. 

 Tentaculites scalarifonais, Hall. Pal. N. V.. vol. v, pt. ii, p. 167, pi. xxxi, tigs. 3-11. 1S79. 



Corniferous Limestone. Delaware, Ohio. 



HYOLITHES, Eichwald, 1840. 



(See Vol. v. part ii, pp. 191-202.) 



Hyolithes centennialis. 



PLATE CXIV, FIGS. 21-23. 

 Hyolithes centennialis, Hakrbtt. Ann. Lyceum Nat. Hist., vol. xi, p. 299. 1877. 



Lower Helderberg group. Port Jervis, Orange county. 



