'468 Annals of the Carnegie Museum. 



The Mounted Skeleton. 



Plate XV is from a drawing of the mounted skeleton. The type 

 of O. longipes was used as the basis of this mount and the missing 

 parts were substituted from other individuals of about the same size 

 and pertaining to the same species. A few bones not represented in 

 the collections were restored in plaster and accurate records were kept 

 of all substituted parts. In the skeleton the restored parts are indi- 

 cated b'y a red -f , and while of the same general color as the actual 

 bones, the shade differs sufficiently for them to be easily recognized. 

 Each substituted bone used in the mount bears its departmental num- 

 ber, thus effecting a complete and permanent record as to the associ- 

 ation of all the bones used in the construction of the composite 

 skeleton. 



The skeleton was mounted by the writer in such a manner that any 

 bone may be readily detached from the whole. 



The pose is intended to represent the animal when walking slowly 

 on the level ground, with the head only moderately elevated. 



The mounted skeleton presents many peculiarities which would be 

 lost to the observer if seen in a disarticulated state. The small cra- 

 nium, elevated above the main axis of the dorsal region, the small 

 thoracic cavity, the narrow pelvis and the greatly elongated limbs and 

 cervical region are characters which are fully appreciated only in the 

 mounted skeleton. The skeleton as a whole resembles more closely 

 that of the llama than the camel. The elevated position of the head, 

 the curvature of the back, and the general shape of the limbs is espe- 

 cially like that of the llama, while the dental formula, the small and 

 elongated cranium, the separated metapodials, the unguligrade char- 

 acters of the phalanges and the extremely narrow pelvis are features 

 readily distinguishable from either of the recent forms. 



Measurements. 



Total length of skeleton from apex of premaxillary to posterior end of 



ischium 212 cm. 



Total height from toes to top of anterior dorsal spines 130 cm. 



Length of cervical region 86 cm. 



Length of dorsal region 60 cm. 



Length of lumbar region 48 cm. 



Length of sacral region II cm. 



