File:Morphippus imbricatus.jpg

Title: The American journal of science
Identifier: americanjournal441897newh (find matches)
Year: 1880 (1880s)
Authors:
Subjects: Science
Publisher: New Haven : J. D. & E. S. Dana
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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J. B. Hatcher—Geology of Southern Patagonia. 331 isted with the Dinosaurs of that period. From a study of the figures and descriptions published by Dr. Ameghino of the fossils found in the Pyrotherium beds, one is even led to believe that they may belong to a period more recent than that of the Santa Cruz beds. I present here in fig. 2, taken from one of Ameghino's latest publications, the superior dentition of Morphippus imbricatus, one of the smaller ungulates described by him as coming from the Cretaceous of Patagonia.
Text Appearing After Image:
Fig. 2. Sup. dentition of Morphippus imbricatus Amegb., after Ameghino. One-half nat. size. The entirely molariform condition of the premolars and the cupped incisors are especially noteworthy. In his " JSTotes on the Geology and Paleontology of Argentina" previously referred to, he says on page 8, in speaking of the Pyrotherinm fauna, " The unarmored edentates are also numerous and of types resembling those of the Santa Cruz formation, but generally of much more considerable size. Nevertheless some forms show very primitive characters, having the molars pro- vided with a well developed layer of enamel. " With these edentates there are Carnivorous animals of a size approximating to that of the largest bears of the present day, but similar to those of the Santa Cruz formation." This is certainly a greater size than that attained by any of the Car- nivorous animals of the Santa Cruz beds. Moreover many of

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