. Bulletins of American paleontology. Alaskan ammonites, Pt. II: Westermann. Scale in Km Text-fig. 1.— Index map of south Alaska. visions of the northwestern European and South American repre- sentatives of the almost universal S. sowerbyi Zone ammonite assemblages. Particularly the Hammatoceratidae and Sonniniidae have been either in a state of utter taxonomic confusion as reflect- ed in the classification of Buckman (1887-1907; 1909-30: NW Eu- rope) , or are poorly known with regard to range variation and affinity (South America). Type specimens were studied in the British Museum of Natural
. Bulletins of American paleontology. Alaskan ammonites, Pt. II: Westermann. Scale in Km Text-fig. 1.— Index map of south Alaska. visions of the northwestern European and South American repre- sentatives of the almost universal S. sowerbyi Zone ammonite assemblages. Particularly the Hammatoceratidae and Sonniniidae have been either in a state of utter taxonomic confusion as reflect- ed in the classification of Buckman (1887-1907; 1909-30: NW Eu- rope) , or are poorly known with regard to range variation and affinity (South America). Type specimens were studied in the British Museum of Natural History and in the Geological Survey Museum, London, with the help of M. K. Howarth and F. M. Anderson; the subgenus Sonninia (Euhoploceras) Buckman was thoroughly revised (Westermann, 1966) ; the most important classi- cal sections in the southern Andes of Chile and Argentina were re- examined (Westermann, 1967) ; plastotypes of specimens described in Tornquist's (1898) monograph were kindly sent by H. K. Schmidt, University of Gottingen, and those of Jaworski's (1926) monograph were sent by H. K. Erben, University of Bonn, Ger- many. Of particular interest were the circum-Pacific genus Pseiido- toites Spath and the alleged Australian Zejnistephanus of which. 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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