Douglass : Dromomeryx. 469 



one of the metapodials is preserved. It lies in the matrix just posterior 

 to the metacarpal. It is flat, and 8 cm. above the distal end of the 

 metacarpal it is 6 mm. in width. The trochlear keels of the meta- 

 podials are high and narrow on the palmar side, and they e.xtend as far 

 upward on the dorsal side as do the distal articular surfaces. The 



Measurements. 



Dromomeryx borealis. 



No 827. No. 1542. 



mm. mm. 



Length of portion of skull preserved 307 



Total length of skull, partly estimated 375 



Width of skull including wings of horns I go 



Height of skull anterior to orbit 1 00 



Vertical diameter of orbit, about 45 



Height of occiput, about 83 92 



Depth of mandible under P^ 29 



Depth of mandible under My 30 



Depth of mandible under heel of M^ 32 



Length of upper molar-premolar series 99 109 



Length of upper premolar series 45 46 



Length of upper molar series 59 63 



Length of lower molar-premolar series Iio 



Length of lower premolar series 43 



Length of lower molar series 67 



Length of neck articulated 390 



Length of atlas 77 77 



Length of axis including odontoid process 91 87 



Length of third cervical including processes 74 74 



Length of cervical 4 80 80 



Length of cervical 5 80 80 



Length of cervical 6 80 



Length of cervical 7 67 



Length of humerus 237 



Greatest diameter of head of humerus 63 



Transverse diameter of distal end of humerus 46 51 



Length of radius 237 246 



Antero-posterior diameter of olecranon of ulna 46 



Length of metacarpal 215 



Length of proximal phalanx 47 



Length of medial phalanx 28 



Length of ungual phalanx 40 



Height of ungual phalanx 21 



Length of tibia 305 



Length of astragalus 47 



Width of astragalus , 31 



