In summary, it seems that there is little or no evidence beyond the numbers of bones involved to support the hypothesis that the concentration of bones in the fissures of Fort Sill represents the remains of food of predators, and that the fissures were used as dens by their predatory occupants. On the contrary, the evidence indicates that the deposition of the bones in the fissures was secondary and that the agency of transportation, deposition and accumulation of the bones was an early Permian stream characterized by periodic flooding. 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._