734 L. D. BURLING CAMBRO-ORDOVICIAN NEAR MOUNT ROBSON 



necessity the intervening Chetang, Tatei, and Hitka formations. As a 

 matter of fact, the so-called "Hota," just above the Mnral Glacier/^ is 

 the "Tall" (§§ 30d, 32b-e), and the top of the mountain does not expose 

 the Titkana, but the Chetung (§§ 26& and 29?;). The succession in 

 Mumm Peak is not (reading from the base upward) "Hota," Chetang, 

 Tatei, Hitka, Mumm, and Titkana, but "Tab," Mahto, "Hota," and 

 Chetang (§§30^ and 32c). 



"PHILLIPS MOUNTAIN" (§17) 



Phillips Mountain was proposed by AYalcott (page 333) for a station 

 (Lynx Center, 9,542 feet) which Wheeler^^ was forced, by the lateness 

 of the day, to occupy on the crest of the north arete of Lynx Mountain, 

 but in his illustrations (plates 57 and 58) Walcott apjDlies the term 

 Phillips to Lynx Mountain, assigning to the latter an elevation of only 

 9,542 feet and crediting the unnamed peak between Mounts Eesplendent 

 and Lynx with the name Lynx and the height (10,471 feet) determined 

 by Wheeler for the real Mount L3'nx. Lynx Center Station lies on the 

 sky line of Walcott's figure 2 of plate 57, half way between the two 

 glaciers to the left of the summit (see the plate opposite page 22( of 

 Wheeler's report, which represents the view from this point). 



MOUNT REARGUARD (§18) 



Mount Eearguard (9,000 feet) was named by Coleman^^ and con- 

 firmed by Wheeler.-^ It is the mountain which Walcott suggested chang- 

 ing to lyatunga ; but the new name has not appeared in the decisions of 

 the Geographic Board of Canada. The mountain is described by Walcott 

 as one of the two mountains best exposing the Middle Cambrian Titkana 

 limestones; but examination of the section showed that even the oldest 

 rocks exposed in the mountain lie much higher than the Middle Cam- 

 brian Titkana. The mountain affords a wonderful and very fossiliferous 

 section of the Upper Cambrian from the Extinguisher Ordovician fauna, 

 at the top, to low down in the Lynx formation, at the base. 



MOUNT ROBSON (§ 19) 



Momit Robson (13,068 feet) is already so well known that we shall 

 not discuss its discovery or nomenclature. A brief discussion of the 

 wonderful section exposed will be found under the heading "Robson 



19 Smithsonian Misc. Coll., vol. 57, no. 12, 1913, pi. 59, fig-. 1. 

 -^ Canadian Alpine Journ., vol. 4, 1912, p. 19. 

 21 The Canadian Rockies, new and old trails. 

 ^ Canadian Alpine .Journ., vol. 4, 1912, p. 36. 



