LITERATURE CITED

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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