. Bulletins of American paleontology. . Text-fig. 42. — Cross-section of the in- ner and intermediate whorls of Pseudo- toites robiginosus (Crick) [det. P. emili- odcs by Arkell; Sedgevvick Museum F 11923], Mount Hill, Western Australia; for comparison with the Alaskan species. Note the planulate and rounded inner whorls. lateral edge at about two-fifths whorl-height, while it is usually de- pressed elliptical in the Wide Bay forms. However, the section of the inner whorls of the Australian Z. corona is apparently poorly known, except for the end of the phragmocone where it is also de- pressed
. Bulletins of American paleontology. . Text-fig. 42. — Cross-section of the in- ner and intermediate whorls of Pseudo- toites robiginosus (Crick) [det. P. emili- odcs by Arkell; Sedgevvick Museum F 11923], Mount Hill, Western Australia; for comparison with the Alaskan species. Note the planulate and rounded inner whorls. lateral edge at about two-fifths whorl-height, while it is usually de- pressed elliptical in the Wide Bay forms. However, the section of the inner whorls of the Australian Z. corona is apparently poorly known, except for the end of the phragmocone where it is also de- pressed ovate. The material collected by Shell Oil Company, the Geo- logical Slavey, and by me from the S. soiverbyi Zone of Wide Bay in summer 1964, is evidence for two distinct but associate otoitid groups, subcoronate Docidoceras (Pseudocidoceras) and planu- late Pseudotoites. Tlius, Pseudotoites is present in North America, but neither as formerly supposed (Arkell, 1954, p. 586) by 'Amjnonites' carlotten- sis Whiteaves from western British Columbia and southeastern Alaska which is a Zemistephanus (Imlay, 1964; Westermann, 1964b, footnote 19, p. 62), nor by the abundant "sub-coronate" Wide Bay forms as I suggested previously {op. cit., pi. 9, fig. 1), but by the scarce planulate P. cf. argentirius Arkell and P. cf. trajisatlanti- cus (Tornquist) of the S. soiverbyi Zone of Wide Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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