396 OSBORN AND MOOK— CAMARASAURUS. 



4. The head of the Sauropoda, as pointed out by Dr. W. J. Hol- 

 land, has been mistakenly represented as parallel with the long axis 

 of the neck, whereas it should be flexed or at an angle with the neck. 

 In this respect our restoration gives a somewhat misleading impres- 

 sion, as the head should be bent down as in PL I, B^ C. 



Comparison with Other Sauropoda. 



As compared with the two other Sauropoda, in which the skele- 

 ton is now fully known, namely, Diplodocus and Apatosaurus, Ca- 

 fuarasaiints is relatively the most massive, the most elevated at the 

 shoulder, the most elongated over all, and the most ponderous in its 

 proportions. It was apparently not provided with the whip-like 

 terminal tail vertebrae so characteristic of Apatosaurus and Diplo- 

 docus; the vertebrae steadily lessen in longitudinal diameter and 

 would indicate that the tail came to a rather abrupt point. 



External Appearance of Camarasaurus. 



The external appearance of the head is shown in PI. I. The 

 head is extremely short and deep in its proportions, contrasting with 

 the elongate head of Diplodocus. The animal as a whole is sketched 

 in Fig. 2. This represents an animal terrestrial in gait but adapted 

 to an amphibious life, with smooth rounded limbs. 



