388 Forty- fifth Report on the State Museum. 



Genus ISOTELTJS, De Kay. 1824. 

 *Isotelus gigas, De Kay. 1824. 

 Annals of the New York Lyceum of Natural History, vol. i, p. 124, 

 pi. xiii, fig. 1. 



Trenton limestone. Trenton Falls, N. Y. 



Tlie Albany Institute donor. 



Family BRONTEIDiE. 



Genus BR.ONTEUS, Goldfuss. 1843. 

 jBronteus JBarrandii, Hall. 1859. 

 Paleontology of New York, vol. iii, p. 350, pi. 73, figs. 1, 2, 3, 4. 

 Lower Helderberg group. Schoharie, N. Y. 



J. Gebhard purchase. 



Bronteus senescens, Clarke. 1889. 



Eighth Annual Report N. Y. State Geologist, p. 51. fig. 1. 

 Chemung group. Prattsburgh, N. Y. 



J. M. Clarke donor. 



Subgenus THYSANOPELTIS, Corda. 1847. 



Bronteus Tidlius, Hall. 1888. 

 Palaeontology of New York, vol. vii, p. 12, pi. 8a., figs. 34, 35. 

 Tully limestone. Kingsley's Hill, near Otisco, N. Y. 



S. G. Williams donor. 



Palaeontology of New York, vol. vii, pi. 8a., fig. 36. 

 Tully limestone. Borodino, N. Y. 



S. G. Williams donor. 



Family PHACOPIDiE. 



Genus PHACOPS, Emmrich. 1839. 

 Phacops Logani, Hall. 1859. 

 Palaeontology of New York, vol. iii, p. 353, pi. 73, fig. 15; and 

 Palaeontology of New York, vol. vii, 1888, pi. 8a., fig. 19. 

 Lower Helderberg group. Schoharie, X. Y. 



J, Gebhard purchase. 



Palaeontology of New York, vol. iii, pi. 73, figs. 23, 24. 

 Lower Helderberg group. Schoharie, N. Y . 



J. Gebhard purchase. 



