LITERATURE CITED

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Peabody, F. E.
1961. Annual growth zones in living and fossil vertebrates. Jour. Morph. 108 (1): 11-62, 69 figs., January.

Romer, A. S.
1956. Osteology of the reptiles. The University of Chicago Press, Chicago, xxi + 772 pp., 248 figs.

Romer, A. S., and Price, L. I.
1940. Review of the Pelycosauria. Geol. Soc. America, Spec. Pap., 28: x + 538 pp., 71 figs., 46 pls., 8 tables, December 6.

Vaughn, P. P.
1958. On a new pelycosaur from the lower Permian of Oklahoma, and the origin of the family Caseidae. Jour. Paleont., 32:981-991, 1 fig., September.

Transmitted March 15, 1962.





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