3l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



indicated that it was a species distinct from Olenellus hozvcUi { = 

 gilbcrti], and in the geological section published in 1908 [Walcott, 

 I90?c, p. 242] the nume OlcncUus canadensis was used for this 

 species. The name was also used in a second publication [Walcott. 

 1908/, p. 215]. 



O. canadensis differs from 0. giJberti, O. thompsoni, and 0. 

 frenionti in its very short eye lobe and the tubercles back of the 

 eye extending to the posterior margin. The fragments of this species 

 occur in immense numbers in several horizons of the Mount Whyte 

 formation along a line of outcrop of some 30 miles in length. 



The associated species in the Mount Bosworth section are : 



Nisusia festinata (Billings). 



Sccnella z'arians Walcott. 



HyoHthcUns. 



Ptychoparia. 



Agraulos. 



Pro fy pus Heldcnsis, new species. 



At this horizon on Mount Stephen were found : 



Micromitra (Iphidella) pannnla (White). 



Acrotreta sagitfalis taconica (Walcott). 



Kntorgina cingulata (Billings). 



Kutorgina, sp. undt. 



A^isiisia festinata (Billings). 



Hyolithes billingsi Walcott. 



Sccnella z'arians Walcott. 



P)'ofypus, new species. 



Agraulos, sp. undt. 



Ptychoparia, 2 sp. undt. 



Formation and Locality. — Lower Cambrian: (ssf) bluish-black 

 and gray limestone of the Mount Whyte formation, about 300 feet 

 (91 m.) below the top of the Lower Cambrian in No. 6 of field 

 section, just above the old railway tunnel on the north shoulder of 

 Mt. Stephen, 3 miles east of Field, British Columbia. Fragments of 

 Olenellus, probably of this species, occur at the same locality as 

 N^f^- 35f> but at horizons 50 feet (57m) and 115 feet (sye) below 

 the top of the Lower Cambrian. 



(35h) about ^^/^^ feet (J14 ni.) bclozc the top of the Loivcr Cam- 

 brian in gray limestone forming Xo. 4 of the Mount Whyte fornia- 

 tion [Walcott, 1908c, p. 214] ; and (587) sandstone about 200 feet 

 (61 m.) Ixdow the top of the Lower Cambrian; both on the slopes 



