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Contents: “Pneumatoarthrus” Cope, 1870, not a dinosaur but a sea-turtle, by Donald Baird; Identifying characters of the early devleopment of the daces “Rhinichthys atratulus” and “R. cataractae” (Osteichthyes: Cyprinidae), by Lee A. Fuiman and Jules J. Loos; Catalogue of type specimens of fossil vertebrates, Academy of Natural Sciences, Philadelphia Part IV: Reptilia, Amphibia, and Tracks, by David D. Gillette; Catalogue of type specimens of fossil vertebrates, Academy of Natural Sciences, Philadelphia Part VI: Index, Additions, and Corrections, by David D. Gillette; Catalogue of type specimens of fossil vertebrates, Academy of Natural Sciences, Philadelphia Part V: Fishes, by David D. Gillette and Earl A. Shapiro; First records of the silvery minnow, “Hybognathus nuchalis” Agassiz, in the Susquehanna River drainage of Pennsylvania, by Robert W. Malick, Jr., Philip C. Ritson and Janet L. Polk; The nomenclature and type collections of the widespread taxa of “Alternanthera” (Amaranthaceae), by James A. Mears; Numerical taxonomy and evolution, by W. Wayne Moss; Catalogue of type specimens of fossil vertebrates, Academy of Natural Sciences, Philadelphia Part III: Birds, by Storrs L. Olson and David D. Gillette; The immature chironomids of the eastern United States III: Tanypodinae-Anatopyniini, Macropelopiini and Natarsiini, by Selwyn S. Roback; Numerical taxonomic studies on the congruence of classifications for the genera and subgenera of Macropelepiini and Anatopyniini (Diptera: Chironomidae: Tanypodinae), by Selwyn S. Roback and W. Wayne Moss; A revision of the tribe Leptysmini except the genus “Cylindrotettix” (Orthoptera: Acrididae: Leptysminae), by H. Radclyffe Roberts. Illus.
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