On the phylogenetic arrangement of the S
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Dr. G. Baur
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Article
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1887
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John Wiley and Sons
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English
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Cope' has given the following classification of the Reptilia :-A. Extremities not differentiated in form beyond proximal I. 0 s quadratum immovably articulated to squamosal, etc. Tubercular and capitular rib-articulations present and distinct. ## I . Ichthyopterygia. A.A. Elements of extremities