170 THE CAMBRIAN. (bull.8L 



following species, formerly assigned to the Lower Cambrian fauna, to 

 the Middle Cambrian zone, considering the Olenellus zone to include 

 only the Lower Cambrian fauna. 1 The species are: 



Protospongia fenestrata, Salter. 

 Eocystitea?? longidactylus, Walcott. 

 Leperditia argenta, Walcott. 

 Agnostus interstrictus, White. 

 01enoide8 nevadensis, Meek (sp.). 



quadriceps, Hall & Whitfield (sp.). 



wasatchensis, H. & W. (sp.). 



8pinosus, Walcott. 



typicalis, Walcott. 

 Ptychoparia housensis, Walcott. 



kingi, Meek (sp.). 



piochensis, Walcott. 

 Tprospectensis, Walcott. 



qnadrans, H. &, W. (sp.). 



subcoronata, H. & W. (sp.). 

 Bathyuriscus howelli, Walcott. 



productus, H. & W. (sp. ). 

 Asaphiscus wheeleri, Meek. 



Ptychasp is piochensis occurs 100 feet above the Olenellus zone proper, 

 in the Highland range section, but as it also occurs 1,137 feet higher 

 up in the same section, it is now referred to the Middle Cambrian fauna 

 and not to the Olenellus fauna. 2 



The presence of Cambrian fossils at Kicking Horse Pass of the Rocky 

 Mountain division of the Canadian Pacific Railway was announced by 

 Mr. H. H. Winwood in 1835. 3 Indirect refereuce was also made to this 

 by Dr. G. M. Dawson in 1884. 4 The specimens obtained at that time 

 were examined by Mr. C. D. Walcott, who recognized Olenellus howelli 

 and Olenoides levis, trilobites characteristic of the Prospect Mountain 

 group of Nevada. 5 



During the survey by Mr. R. G. McConnell of the section along the 

 line of the Canadian Pacific Railway there was discovered at Mount Ste- 

 phen a zone of fossiliferous slate 2,000 feet above the base of the Castle 

 Mountain limestQne. Prom the collections obtained Dr. C. Uominger 

 described the new genus Embolimus and five new species of trilo- 

 bites, viz : Ogygia klotzi, 0. serrata, Embolimus spinosa, E. rotundata, 

 and Gonocephalites cordillerce. He also identified Mi nocephalus salteri f , jj 

 Billings, Bathyurusf, Agnostus ( u compare A. interger Barr"), and the 

 genera Orthis, Obolella, Kutorgina, Leptaena ?, Metoptoma, and Hyo- 

 lithes. 6 



1 Stratigraphic succession of the Olenellus fauna in North America and Europe. Am. Jour. Sci., 

 3d ser., vol. 37, pp. 374-392 ; vol. 38, 1889, pp. 29-42. 



2 Op. cit.,p. 387. 



* Geological age of the Rooky Mountains. G-eol. Magazine, new ser., dec 3, vol. 2, 1885, p. 240. 



" * Recent geological observations on the Canadian Northwest Territory. Scie nee, vol. 3, 1884. p. 648. 



6 Preliminary report on the physical and geological features of that portion of the Rocky Mountains 

 between latitudes 49° and 51° 30 7 . GeoL Surv. Canada, new aer., vol. 1, 188d, p. 14013 . 



• Description of Primordial fossils from Mount Stephen, Northwest Territory of Canada. Philadel- 

 phia Acad. ScL, Proc, 1887, pp. 12-19. 



