230 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
Order SAURIA 
POLYGLYPHANODONTIDAKH, new family 
For family relationships, see page 264. 
Genus POLYGLYPHANODON Gilmore 
Polyglyphanodon Gi~MoreE, Smithsonian Misc. Coll., vol. 99, pp. 1-2, 1940. 
Etymology: odts, many; yAtdavos, chisel; ddobs, tooth. 
Genotype.—Polyglyphanodon sternbergi Gilmore. 
Diagnosis: Dentition subacrodont, heterodont; teeth posterior to 
the first seven transversely widened, with sharp transverse cutting 
edges; upper and lower teeth indistinguishable; skull deep, strongly 
constructed; pineal foramen on parietofrontal suture; premaxillary 
with long spine; postfrontal distinct; posterbital present, maxillary 
deep; squamosal wide dorsoventrally; coronoid extending high above 
level of ramus; splenial extensive but falling short of symphysis; 
surangular and articular distinct; angular greatly restricted on ex- 
ternal surface; vertebrae procoelous; zygosphene and zygantrum well 
developed; centra tapering; 29 presacral, 2 sacral vertebrae; coracoid 
with one emargination; clavicles perforate; interclavicle anchor- 
shaped, with bifurcated proximal end; illum with rectangular upper 
extremity; ischia and pubes hke Zguana; limb bones of moderate 
length, stout; feet typically lacertian; digital formula of manus: 2, 
3, 4, 5,3; digital formula of pes: 2, 3, 4, 5, 4. 
POLYGLYPHANODON STERNBERGI Gilmore 
Polyglyphanodon sternbergi GiLMoRE, Smithsonian Misc. Coll., vol. 99, pp. 1-2, 
fig. 1, 1940. 
Type—uvU.S.N.M. No. 15477, consists of the skull, lower jaw, and 
many skeletal parts; collected July 22, 1987. 
Paratype—vU.S.N.M. No. 15816, consists of a nearly complete 
articulated skeleton; collected in July 1938. 
Locality —‘South Dragon,” Manti National Forest, Emery County, 
Utah. 
Horizon.—Lower part of North Horn formation, Upper Creta- 
ceous. 
Specific name.—In honor of George F. Sternberg, who found the 
first specimen. 
Other specimens: In addition to the type specimen there were skele- 
tal parts of 11 other individuals available for this study. All of 
these came from a small “badland” area in a valley locally known as 
the “South Dragon,” about midway between Ferron Canyon on the 
south and the road crossing the valley to North Horn Mountain on 
the north. There has been much faulting in this area, and I was 
