According to Professor Winchell's labels, five specimens are represented in the collection. One series, comprising a nearly complete skeleton, was by him referred to one individual; the only reason for doubting this collocation is that the skull seems to be of a male, while the sacrum agrees well with that referred by Williston to a female (1894, p. 36). In all probability the differences shown in the sacra figured by Williston are merely individual. The other bones of this series clearly belong together, and the bones are in excellent preservation. The other skeletons are represented by much less complete material.
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