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The anatomy and systematic position of the antpipits Conopophaga. and Corythopis

Published in Postilla, in 1968, in volume 114, pages 1-32

A didelphid (Marsupialia) from the Early Eocene of Colorado [USA, mandible]

Published in Postilla, in 1968, in volume 115, pages 1-3

A diapsid (Reptilia) parietal from the Lower Permian of Oklahoma [USA |

Published in Postilla, in 1968, in volume 117, pages 1-7

Avian anatomical specimens in the Peabody Museum of Natural History, Yale University

Published in Postilla, in 1968, in volume 118, pages 1-40

A new sibling Papilio from the. Rocky Mountains, with genetic and biological notes (Insecta. Lepi-doptera)

Published in Postilla, in 1968, in volume 119, pages 1-40

Ectoproct and entoproct type material: re-examination of species from New England and Bermuda named by A. E. Verrill, J. W. Dawson and E. Desor

Published in Postilla, in 1968, in volume 120, pages 1-95

A new dinocephalian from the Cisuralian region (Reptilia, Therapsida; Upper Permian)

Published in Postilla, in 1968, in volume 121, pages 1-20

A new Devonian fish (Crossopterygii: Rhipidistia) considered in relation to the origin of the Amphibia

Published in Postilla, in 1968, in volume 124, pages 1-13

Morphology and systematics of the northern Dvina Cynodonts (Reptilia, Therapsida; upper Permian)

Published in Postilla, in 1968, in volume 126, pages 1-51