318 C E. Beecher — Reconstruction of a Cretaceous Dinosaur. 



Condition of the Skeleton and Amount of Restoration. (See Plate 

 XL v.) — The head and neck have been left in the original matrix, 

 with the exception of the five posterior cervicals, which were separated 

 in order to form the ciirve joining the trunk. As found, the head was 

 bent under the body and the cervicals turned ninety degrees from 

 the median plane. This accounts for the fact that the neural spines 

 are directed outward. 



The series of dorsal vertebrae is complete. The spines of the pos- 

 terior dorsals are restored. With the exception of the second, the 

 ribs from the first to the seventh were modelled from those on the 

 right side, while those remaining on the left side are well preserved 

 and in the matrix. They are somewhat bent by pressure, but it was 

 thought best to leave them as originally found, especially as the 

 impression of the blade of the scapula was preserved. The right 

 scapula of this individual is complete, but it was necessary to restore 

 the left one and to substitute the anterior half of the scapula of 

 another individual. The coracoid is modelled from another speci- 

 men. The sternal bone is complete and belongs to this skeleton. 

 Both humeri, radii, and ulnje were preserved, as well as the metacar- 

 pals of both fore feet. The carpal bones were modelled after Pro- 

 fessor Marsh's drawing. About half the phalangial bones were pre- 

 served, and the missing ones have been modelled. 



The sacrum and pelvic region were quite complete and are still in 

 the rock, the only restoration necessary being the spines of the sacral 

 vertebrae and part of the posterior portion of the ilium, which were 

 modelled from another specimen. The left pubis and ischium were 

 essentially entire. 



The outside of the left femur was considerably exfoliated and 

 shattered and has been restored, though the main part of it is in its 

 original position in the rock. The end of the right femur is also 

 partially restored. 



The remaining bones of both hind legs and both feet were all in 

 proper sequence in the rock, the only missing bone being the 

 terminal phalanx of the middle toe of the left foot. This was sup- 

 plied by a cast of the same bone in the right foot. 



A considerable portion of the tail was wanting, though fortunately 

 the pi'oximal third was nearly perfect and in a natural position, with 

 the chevrons attached. The middle and distal portions were repre- 

 sented by a number of detached vertebrae, and with the information 

 furnished by an entire tail of another specimen it has been possible 

 to restore this member in a satisfactory manner. 



