In the course of examining material from fissure deposits of early
Permian age collected from a limestone quarry near Fort Sill, Oklahoma,
the author recovered several tooth-bearing fragments of small
pelycosaurs. The fragments were examined, compared with descriptions of
known kinds appearing in the literature, and determined to be new genera
within the Nitosauridae (Edaphosauria) and Sphenacodontidae
(Sphenacodontia).
Appreciation is expressed to Prof. Theodore H. Eaton, Jr., for
permission to examine the collections of the University of Kansas from
Fort Sill, and for the financial assistance furnished by his National
Science Foundation grant (NSF-G8624). I am grateful both to Prof. Eaton
and Mr. Dale L. Hoyt for their suggestions regarding this manuscript.
The accompanying figures have been drawn by the author.