Bt 
138 Fossil Bones from Oregon Territory. 
of this tooth you will perceive four facets looking towards each 
other, with an intervening, transverse, polished furrow ; and it is 
to this part to which I would especially invite attention, and a 
careful comparison with the generic characters of ae gethestiee: 
as pies: by Fischer,* which I quote: “Dent prim et lan ¢; 
‘=> obducti, tritoris, coronide nunc plana transversim 
suleata, nunc medio excavata marginalis prominalis.” The lower 
part of the tooth is of the same shape and size as the crown, with — 
a conical cavity at its base. Itisa ates of the sc aa (Omen 
Megalonyx (Harlan)? - 
The larger fragments above wahedesh to are two in number; 
which from their striking resemblance to the extremities of the 
humerus, I cannot but consider as portions of that bone. (See 
Fig. 2.) A; head of the bone; B, the greater, C the smaller tu- 
berosity. The length of the. lagi fragment (from A to D) is 
fourteen inches; its breadth measured across the tuberosities, 
seven anda half inches ; the diameter of the head of the hume- 
rus, four and a half inches; the circumference of the body of the 
bone just below the tatastosities, fourteen and a half inches; from 
the summit of the external tuberosity to the prominence E (see 
Fig. 4) on the front of the bone, twelve inches. There are the 
remains of a large protuberance on the outside of the humerus, 
a fittle more than half way down the body of the bone, which 
bears a strong resemblance (if my memory does not fail me) to 
a marked projection on the humerus of the Orycteropus. Some 
small portions of the front and back of the body of the bone are 
Ses but the lowest parts on the sides correspond with the 
ed surface of the lower extremity, which I will now de- 
On this portion are to be seen the external (F) and internal 
(G) condyles, and the articulating surface of the elbow joint (H); 
and on the back part, Fig. 3,a large deep hollow, I, for the re 
ception of the olecranon process of the nlna; the interned larger 
half of the articulating surface (Fig. 2, a) presents the appeatr- 
ance of a hinge joint, and seems well adapted for progression, 
the outer half presents a large smooth, round ball, (Fig: 2, 
b,) ‘upon which the head of a radius might freely roll. The 
breadth of this. easens: measures across ies Stet va 
ee SO ee ee, es 2 Pha ae ai bos a 
