1877.] 231 [Cope. 
Measurements. M. 
Vertical extent of right pharyngeal.................00. .020 
Hengtihyo froma imei seteneatarc a ayeleleicvsiscteicrels: Paeietera 009 
Bs OSS OU Ceryein eter stoke elelelate ciokons ai-ie'e ci clcleteysicte.e .009 
po eee OLaLCLTS GenllelNTnAO pes eve iot-letstatelerstctckelsice|ofelsteteletel sores .009 
Wild bhai emits ito ort bers, Fale / 3. 2)- (ele ttyercte ol wlovelaislevenele ere Me lelecie! O04 
DMMEURSE COM TOOUME cid = sraterere rere totcvet eta) sisveteser els Rash stoxs .008 
enero tiling TOO pbs ty. ).c-'stojracles ctatete’ serelelevel evel ave-cisy | ove .005 
Found by Chas. H. Sternberg in the Pliocene of Oregon. 
On some Saurians found in the Triassic of Pennsylwania, by C. M. Wheatley. 
By E. D. Cope. 
(Read before the American Philosophical Society, Dec. 21, 1877.) 
THECODONTOSAURUS GIBBIDENS sp. nov. 
The only remains of this saurian which have come into my hands are two 
teeth. They are in good preservation, lacking only the great part of the root. 
They present the leaf-like outline characteristic of the genus, the crown 
being strongly distinguished from the narrower root. The form is quite 
robust, and contracts gradually to the apex. The cutting anterior and pos- 
terior edges bound the inner face of the crown, from which they are sepa- 
rated by a groove along their bases. They are interrupted by coarse serra- 
tions, the apices of the denticles being directed upwards. These are much 
reduced in size at the base of the crown. The cutting edges are not sepa- 
rated from the external face by grooves. This face is very convex and 
perfectly smooth. The inner face is convex between the grooves and is 
marked with six or seven continuous sulci, which are obsolete at the base. 
The saurian which possessed the tooth described was not of large propor- 
tions. The species differs from the English form in many respects ; e. g., 
the greater convexity of the external face; the basal grooves of the cut- 
ting edges, the grooving of the inner face, the abrupt constriction below 
the base of the crown, etc. 
Measurements. M. 
Diainster’on crown | ANTETO-POStENION sities jee cise ose .0070 
GUATISMERSEs yo) tcl hak neces, miaes 2) 0045 
Whenetholy Crow Aste jee Setters Sefer cicie ea wee nek eies .0088 
