SPENCER NIAGARA FOSSILS. 555 



Niagara Fossils. 



By J. W. Spencer, B.A.Sc, A.M.. Ph.D., F.G.S. 



Professor of Geology in the University of the State of Missouri; late Vice-President of 

 King's College of Nova Scotia. 



PART I. 



GRAPTOLITID>£ OF THE UPPER SILURIAN SYSTEM. 



PART II. 



STROMATOPORIDXE OF THE UPPER SILURIAN SYSTEM. 



PART III. 



FIFTEEN NEW SPECIES OF NIAGARA FOSSILS. 



NINE PLATES. 



PART I. 



GRAPTOLITlD/£ OF THE UPPER SILURIAN SYSTEM. 



Introduction. 



The plant-like animal forms which have been included in the Grapto- 

 lite family have hitherto been considered as belonging essentially to the 

 muddy deposits of the Cambrian and Cambro-Silurian systems. How- 

 ever, a Canadian locality was discovered at Hamilton, Ontario, in the 

 Niagara series, about the year 1868, by Lieut.-Col. Charles Coote Grant 

 (H. P. i6th Reg't H.B.M. service). The earliest Upper Silurian Grapto- 

 lites made known were five species, described by Prof. James Hall, Pal. of 

 N. Y., vol ii., 1852. Since that time six more species have been added 

 by Dawson, Billings, Hall, and Whitfield. During 1878, the writer de- 

 scribed nine additional species in the Canadian Naturalist. In the pres- 

 ent paper there will be found twenty-one new species, and the plates of the 

 previously described nine species (figured for the first time) ; thus making 

 forty-one described species of Upper Silurian Graptolites. 



For a large number of the specimens, herein described,! am indebted to 

 the generosity of the indefatigable worker Col. Grant. Other acknowl- 

 edgments are due to Mr. A. E. Walker, and to Mr. Turnbull, of Hamil- 

 ton, Ontario. 



iv — 4 1 [May, i8?4. 



