52 OEEODON. 



20. Fragments of the upper and lower jaw, the former containing the last two 

 molars, the latter the last three molars. Upon these was originally established the 

 Merycoidudon Culhertsonii, in the Proceedings of the Academy of Natural Sciences 

 (vol. iv. p. 47. Plate: Figs. 1-5). 



The specimens were collected by Mr. Alexander Culbertson, and presented to 

 the Academy of Natural Sciences by his father Mr. Joseph Culbertson. 



Average Measurements of Specimens of Oreodon Culbertsonii ; hut principally taken 

 from the female head represented in Plates II. and IV. Figs. 1, 2. 



Inclics. Lines. 



Leugtli of skull fi'om occipital condyles to incisive alveoli in the female . . 7 4 



Length of skull from occipital condyles to incisive alveoli in the male . . 7 9 



Length of face from antero-orbital margin to incisive alveoli .... 3 6 



Length from post-glcnoid tubercle to incisive alveoli ..... 6 6 



Length from hinder part of last molar to incisive alveoli .... 4 3 



Length from inion to coronal suture ........ 2 10 



Length from coronal suture to end of nose . . . . . . • . 4 8 



Length of OS frontis at middle ......... 1 10 



Greatest breadth of skull at zygomata ........ 4 2 



Greatest breadth at inter-temporal region, near middle ..... 1 7 



Least breadth at coronal suture ......... 1 3 



Breadth at middle of post-orbital arches ....... 3 3 



Breadth of face above last molar ........ 2 9 



Breadth of face above first premolar ........ 1 4 



Breadth of face at infra-orbitar foramina ....... 1 7 



Breadth between ends of frontal angular processes ..... 9 



Breadth of each nasal bone ......... 5 



Vertical diameter of the orbit ......... 1 3 



Transverse diameter of the orbit . . . . . ■ . . .1 1 



Greatest length of lower jaw . . . . . . . . .6 2 



Height of lower jaw at coronoid process 3 3 



Height of lower jaw at condyle ......... 2 9 



Height of lower jaw at last molar ........ 1 7 



Height of lower jaw at second premolar 1 1 



Length of series of upper molars ........ 3 4 



Length of series of lower molars ........ 3 3 



Length of series of upper true molars ....... 1 10 



Length of series of lower true molars ....... 2 



Antero-posterior diameter of last upper molar ...... 9 



Antero-posterior diameter of last lower molar ...... 11 



Antero-posterior diameter of penultimate lower molar ..... 7 



Antero-posterior diameter of upper premolars ...... 5 



Antero-posterior diameter of lower premolars ...... 5| 



Length of crown of upper canine male 9 linesj female 7 



Length of crown of lower canine ........ 6| 



Breadth of lateral series of upper incisors ....... 7 J 



Breadth of lateral series of lower incisors ....... 9 



Length of crown of upper internal incisor ....... 8 J 



Length of crown of upper lateral incisor ....... 4i 



Length of crown of lower internal incisor ....... 3| 



Length of crown of lower lateral incisor 5 



