Cope.l 5p0 [ Feb , 16) 



produced, and is evidently the point of connection with the other parts of 

 the skeleton. The bone is flat on one side and convex on the other, and 

 can only be identified with probability, with the scapula of a Dinosaurian 

 reptile. 



The large size of the anterior limb, which might be inferred from this 

 scapula, is justified by the humerus, which is preserved in almost perfect 

 condition. This humerus is one of the longest, and is distally the most 

 contracted known in the Dinosauria; the proximal extremity is of the form 

 usual in that order. A short distance below the head, the section is T- 

 shaped, with one end of the transverse limb shorter than the other. The 

 ridge of which this limb is a section, is almost wanting at the head, which' 

 is thus T-shaped. The limb representing the stem of the T is stouter than 

 the others, and forms the summit of a massive column, which soon sinks 

 into the shaft. Its free extremity is obtuse and rounded, and though repre- 

 senting the head, does not rise above the level of the other crests, or tuber- 

 osities. The distal extremity of the humerus looks much like that of a 

 tibia. It is truncate, and its long axis is in the plane of the tuberosities of 

 the head. Its outline is oval, one end narrowed to an angle, and the other 

 broadly rounded. The surface is roughened with coarse pits. 



The distal extremity of another long bone, most probably the ulna, is 

 more robust than that of the humerus. The shaft is a flattened oval, and 

 the articular extremity is a wide and somewhat irregular oval, the greatest 

 transverse diameter being nearer one end. The articular surface is 

 roughened with coarse pits. 



Three metatarsals were found in immediate proximity to each other, 

 two in nearly their normal relations, and one slipped forwards. They are 

 neither remarkable for length nor abbreviation. The proximal ends are 

 truncate, and. the distal ones convex, but without distinct median grooves 

 or lateral angles. Both extremities are moderately expanded, and the 

 shafts are contracted at the middle. The external bone is a little shorter 

 than the two others, and is more flattened. It has a slightly-defined con- 

 vex head, with an adjacent prominent, but ill-defined, lateral crest. The 

 larger of the longer bones has a crest at one angle, like that of an olecranon 

 process. The proximal end of the same bone is massive, and is trapezoidal 

 in outline ; the outline of the corresponding head of the adjacent bone is 

 triangular. A marked character of these bones is the rough or pitted sur- 

 face of their articular extremities, except the distal end of the shorter bone. 

 The shafts are solid, and filled with nearly equal, coarse cancelli. 



The bones above described are evidently those of a Dinosaurian reptile, 

 and they present characters which have not been previously observed in 

 any other genus of the order. The form of the condyles of the humerus 

 distinguishes it from the other known genera, especially from those of the 

 European Trias, where the crest is weak or wanting. 



The rugose articular surfaces are also peculiar, indicating less than the 

 usual mutual movement of the bones upon each other. A cartilaginous 

 cap is indicated, which was probably the element from which the mam - 



