. Ontario Sessional Papers, 1874, . Fig. 8. a, Fragment of Endoceras longissimum (Hall)? showing the siphuncle. a!, Sum-mit of the same. Hudson River Group. {Ref. Hall, Pal, N. Y., Vol. PI. XVIIL Figs. 1, 1 a.) A fragment about nine inches long and three and a half inches in diameter, showing alarge excentric siphuncle, the diameter of which is about one inch. The septa are aboutfour lines apart. The condition of preservation of the specimen is such as to render a posi-tive specific determination impossible. 44. Orthoceras teretiforme (Hall). {Ref., Pal., N. Y., Vol. I, PI. XLII, Figs.
. Ontario Sessional Papers, 1874, . Fig. 8. a, Fragment of Endoceras longissimum (Hall)? showing the siphuncle. a!, Sum-mit of the same. Hudson River Group. {Ref. Hall, Pal, N. Y., Vol. PI. XVIIL Figs. 1, 1 a.) A fragment about nine inches long and three and a half inches in diameter, showing alarge excentric siphuncle, the diameter of which is about one inch. The septa are aboutfour lines apart. The condition of preservation of the specimen is such as to render a posi-tive specific determination impossible. 44. Orthoceras teretiforme (Hall). {Ref., Pal., N. Y., Vol. I, PI. XLII, Figs. 8, a. h.)Locality and Formation.—Trenton Limestone, Collingwood. 45 Leperditia Canadensis (Jones) ( Canadensis, Geological Survey of Canada, Decade III, p. 91. PI. XI, Fig1-5.) Locality and Formation.—Abundant in a bed of lithographic stone near the base of theTrenton Limestone, Lake Couchiching. 46. ASAPHUS PLATYCEPHALUS (Stokes). lUf. Isotelus yigas, Hall, Pal., Vol. I, p. 231, Pis. LX, LXI, LXII, and LXIII.) Loc
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