no ^ NEW YORK STATE MUSEUM 



PTEROPODA 



HYOLITHELLUS BilUngS 



Hyolithellus micans Billings 



5641 ^^^^^ HYPOTYPE Hyolithellus micans Billings. Cana- 



dian naturalist, 2d ser. 1871. 4:215. 



Ruedemann. New York state museum bulletin 49. 

 1901. pi. 2, fig.ii. 



Trenton conglomerate 



Rysedorph hill, Rensselaer co N. Y. 



Hyolithes nea polls see Hyolithus neapolis 



HYOLiTHUS Eichwald 

 Hyolithus neapolis Clarke 



5642 iiJ-^-2- PLASTOTYPE Clarke. United States geological survey 



bulletin 16. 1885. pl,3, fig4,5. 



Clarke. New York state museum memoir 6. 1903. 

 pi. 20, fig 23. 



Portage (Naples) beds Naples N. Y. 



J. M. Clarke, donor 



5643 --}^-^ HYPOTYPE Hyolithes neapolis Clarke. United 



States geological survey bulletin 16. 1885. p. 56. 



Hyolithus neapolis Clarke. New York state 

 museum memoir 6. 1903. pi. 20^ fig.22. 



Portage (Naples) beds Naples N. Y. 



J. M. Clarke, donor 



5644 ^^^^ HYPOTYPE Clarke. New York state museum memoir 6. 



1903. . pi. 20, fig 24. 



Portage (Naples) beds Naples N. Y. 



J. M. Clarke, donor 



5645 ^^^^^ HYPOTYPE Clarke. New York state museum memoir 6. 



1903, pi. 20, fig 25. 



Portage (Naples) beds Naples N. Y. 



J. M. Clarke, donor 



5646 J-i-^2.9. HYPOTYPE Clarke. New York state musem memoir 6. 



1903. pi. 20, fig. 26. 



Portage (Naples) beds Naples N. Y. 



J. M. Clarke, donor 



