. Breviora. 14 BREVIORA No. 335 METRIC 1. PLATE 3 o, h, d, Palaeolabriis montanensis, n. sp., late Cretaceous, Hell Creek For- mation, Montana, a, ventral and b, dorsal views of composite complete right dentary, anterior end = MCZ 9344, posterior end = MCZ 9341; d, much enlarged view of unworn teeth from type left vomer (?), MCZ 9343. c, Coriops amnicoliis, n. gen., n. sp., late Cretaceous, Lance Formation, Wyoming. Much enlarged view of unworn teeth from basibranchial tooth plate, AM 9319. In a — b, specimen of posterior end of dentary reduced slightly to fit anterior end, the latter X 2, c —

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. Breviora. 14 BREVIORA No. 335 METRIC 1. PLATE 3 o, h, d, Palaeolabriis montanensis, n. sp., late Cretaceous, Hell Creek For- mation, Montana, a, ventral and b, dorsal views of composite complete right dentary, anterior end = MCZ 9344, posterior end = MCZ 9341; d, much enlarged view of unworn teeth from type left vomer (?), MCZ 9343. c, Coriops amnicoliis, n. gen., n. sp., late Cretaceous, Lance Formation, Wyoming. Much enlarged view of unworn teeth from basibranchial tooth plate, AM 9319. In a — b, specimen of posterior end of dentary reduced slightly to fit anterior end, the latter X 2, c — d,Y. 15, e — f X 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University

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