GENERAL CHARACTER AND CORRELATION 715 



America at the time Whiteaves made his studies. Amiotites vancouver- 

 ensis was described by Whiteaves from the argillites of Queen Charlotte 

 Islands that contain Pseudomonotis sub circular is. This species has been 

 reported 56 also, together with Pseudomonotis subcircularis, in the Parson 

 Bay group of ITarbledown Island. It probably occurs also in the argil- 

 lites of the Cultus formation" on the west slope of the Cascades, where 

 it is associated with Aulacoceras ? ct carlotlense Whiteaves. The latter 

 genus, according to Mojsisovics, is known only in the Upper Triassic. 

 The fossil from Eobson Island, described by Whiteaves 58 as Amiotites sp., 

 is closely related, according to Freeh, 59 to Ceratites japonicus Mojsisovics 

 of the Triassic of Japan. Although the latter species has been referred 60 

 to the Ladinic, it occurs 61 in beds that apparently overlie those contain- 

 ing Pseudomonotis ochotica. It should also be noted that Amiotites 

 probably occurs in Alaska (see pages 695, 712) in the upper part of the 

 McCarthy formation. 



The Pseudomonotis horizon of Alaska is probably represented on the 

 islands east of Vancouver Island by the Parson Bay group, 62 which con- 

 sists of "shales, argillites, impure limestones, calcareous sandstones and 

 quartzites," which contain Pseudomonotis subcircularis, Ualobia, Natica 

 (?), and Amiotites Vancouver ensis, and which rest on the lavas, breccias, 

 and tuffs described as the Yaldes group. 



These rocks may be correlated also with the argillites of the Cultus 

 formation, 63 which is exjDosed near the western base of the Cascade Eange 

 and which contains Amiotites Vancouver ensis Whiteaves ( ?) and Aula- 

 coceras (?) cf. carlotlense Whiteaves. 



The argillites of Whipsaw Creek, near the headwaters of the Similka- 

 meen, on the crest of the Cascades, which were described by Dawson 64 as 



56 J. Austen Bancroft : Geology of the coasts and islands between the Strait of Georgia 

 and Queen Charlotte Sound, British Columbia. Geol. Survey of Canada, Memoir 23 (No. 

 11S8), 1913, pp. 75-76, pi. ix (b). 



57 R. A. Daly: Geology of the North American Cordillera at the Forty-ninth parallel. 

 Geol. Survey of Canada, Memoir 38, pt. 1, 1912, pp. 516-517. 



58 J. F. Whiteaves : On some fossils from the Triassic rocks of British Columbia. Con- 

 tributions to Canadian paleontology, vol. 1, pt. ii, No. 3, 1889, p. 147, pi. 19, fig. 3. 



59 Fritz Freeh: Die zirenmpacifische Trias. Lethcca geognostica, Teil ii, Bd. 1, 190S, 

 p. 490. 



00 Fritz Noetling : Die asiatische Trias. Letluea geognostische, Teil ii, Bd. 1, Liefer- 

 ung 2, 1905, pp. 195-196, 220. 



61 Edmund von Mojsisovics : Ueber einige japanische Triasfossilien. Beitrage zur Pala?- 

 ontologie Osterreich-Ungarns. Bd. vii, 1889, pp. 163-178. 



02 J. Austen Bancroft: Geology of the coasts and islands between the Strait of Georgia 

 and Queen Charlotte Sound, British Columbia. Geological Survey of Canada, Memoir 23 

 (No. 1188), 1913, pp. 75-77. 



a3 R. A. Daly: Geolog3 r of the North American Cordillera at the Forty-ninth parallel. 

 Geol. Survey of Canada, Memoir 3S, pt. 1, 1912, pp. 516-517. 



64 George M. Dawson : Preliminary report on the physical and geological features of 

 the southern portion of the interior of British Columbia. Geol. Survey of Canada. Re- 

 port of progress for 1S77-1S7S, pp. 66B, 67B. 



