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Camarotoechia, atrypa, atrypella and carchidium-conchidium Alaska. Plate 8 in U.S. Geological Survey. Professional paper 233-C. 1952.
Atrypella, lissatrypa, nucleospira, alaskospira, howellella and delthyris. Alaska. Plate 7 in U.S. Geological Survey. Professional paper 233-C. 1952.
Conchidium alaskene. Alaska. Plate 9 in U.S. Geological Survey. Professional paper 233-C. 1952.
Conchidium, cramarotoechia, eospirifer, howellaella and cymostrophia. Alaska. Plate 10 in U.S. Geological Survey. Professional paper 233-C. 1952.
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