HOLLAND: THE OSTEOLOGY OF DIPLODOCUS MARSH 229 
it, the front being much elevated, as in the ruminant mammals.’”’ When it became 
the duty of the writer to endeavor to assign the skull a position in the restoration 
in connection with the atlas and the axis, he was at once confronted by the fact 
that to place the skull with its longer axis in a line parallél with that of the cer- 
vical vertebree was a mechanical and anatomical impossibility. The foregoing 
remarks of Professor Marsh had been overlooked by him at the moment, or they 
would have led him to a speedy solution of the difficulty. A careful study of the 
atlas, the axis, and the skull led him and his assistant, Mr. Coggeshall, after re- 
peated failures to satisfactorily place the skull in the position usual among reptiles, to 
the final conclusion that the skull of Diplodocus in life was adjusted to the cervical 
series of vertebree in such a manner that its longer axis formed an obtuse angle with 
the axis of the anterior cervical vertebree. The correctness of this decision, which 
was the only one which could be reached, we subsequently found to be adumbrated 
and confirmed by the remarks of Professor Marsh, quoted above. Professor Marsh, 
though not called upon to articulate a skeleton of the animal, had with keen in- 
sight already detected the exceptional character of the skull with which he was 
dealing. 
The figure on page 228 shows the skull of Diplodocus in the position assigned 
to it in the recent restoration of the skeleton. The attitude given the animal in the 
restoration is that which it might be imagined to have assumed when reaching for- 
Fig. 2. Sketch by Miss Alice B. Woodward showing a supposable attitude of Diplodocus. (From the Weekly 
Graphic, London, May 13, 1905.) 
ward with its long neck in quest of food. The motive in adopting this pose for the 
restoration was to bring the skull and the vertebree of the neck within the range of 
easy vision on the part of observers. It is the opinion of the writer that the ani- 
