"Vol. 5] Merriam. — John Day Carnivora. 53 



MEASUREMENTS. 



Vertebrae, associated with type skull of A. debilis major, No. 1681. 



mm. 



Axis, length of centrum including odontoid process 53 



Axis, antero-posterior length of neural arch, approximate 54 



Axis, height from middle of inferior side of centrum to top of neural 



arch 43 



Third cervical, length of inferior side of centrum 22 



Third cervical, width across postzygapophyses . 33 



No. 1680, associated with lower jaw of A. debilis major (?). 



Fourth lumbar, length of centrum 40 



Fourth lumbar, width of posterior end of centrum 28 



Fourth lumbar, height of posterior end of centrum 19 



Fifth lumbar, length of centrum 41 



Fifth lumbar, width across posterior zygapophyses 24 



Sixth lumbar, length of centrum 40.5 



Sixth lumbar, width of posterior end of centrum 29 



Sixth lumbar, height of posterior end of centrum 19 



Sixth lumbar, height of neural spine above lower side of neural canal, 



approximate 48 



Seventh lumbar, length of centrum 38 



Seventh lumbar, width of posterior end of centrum 31 



Seventh lumbar, height of posterior end of centrum 19 



Seventh lumbar, width across metapophyses 33.5 



No. 110, associated with Archaelurus type of tibia and calcaneus. 



Caudal, length 53 



Caudal, transverse diameter at narrowest point 14.7 



Caudal, height of posterior end of centrum 15 



POGONODON DAVISI, II. Sp. 



PI. 6, Figs. 1, 2, and 3. 



No. 789, Univ. Calif. Col. Vert. Palae. From the Upper John Day, five 

 miles southeast of Monument, Grant County, Oregon. 



Distinctive Characters. — Skull large, sagittal crest very high 

 and thin, brain case small. Dentition -, L , -, -. Third upper in- 

 cisor relatively large. Upper canines large but not greatly com- 

 pressed laterally. P 2 very small, one-rooted. P 4 without deu- 

 terocone, with incipient protostyle, not exceeding the superior 

 canine in antero-posterior diameter. M 1 small, narrow trans- 

 versely, without distinct internal or protocone lobe. 



The type specimen, a skull without mandible, was found in 

 the Upper John Day beds, southeast of Monument, Oregon, by 



