R. S. Lull — New Tertiary Artiodactyls. 



109 



Alet ornery x 

 12 3 



Antilo- 

 Average capra 

 Aleto- 180 



Length 



Width 



Depth over tubercles 



Neural canal, width ....... 



" il depth post. . . 



" " " ant.... 



Indices, length to width, 1-22 

 * Estimated. 



m. m. 



0359 -0373 



0430 -0440 4 



0210 -0243 



0137 -0160 



0140* -0135 



0114 -0126 



1.10 



m. 

 •0360 

 •0470 

 •0280 

 •0145 

 •0157 

 •0110- 



meryx 



m. 

 •0364 

 •0444 

 •0244 

 •0147 

 •0144 

 0117 



female 



m. 

 •0626 

 •0693 

 •0458 

 •0211 

 •0210 

 •0177 



Eatio 

 1-72 

 1.56 

 1-87 

 1-44 

 1-46 

 1-51 



Av. 1-59 



Axis (tig. 10). — The axis bones of Antilocapra and 

 Aletomeryx (numbered 1-3) are again very similar, the 

 only noticeable distinctions being the flatter centrum and 

 more pointed odontoid process and the greater obliquity 

 of the anterior face in the fossil. The foramen transver- 

 sarium is also more conspicuous in the fossil. Other 

 differences will show in the table of measurements. 



Length, centrum 



Width, ant. face 



Width, across postzygapophysis . 



Depth 



Neural canal, width 



Neural canal, height 



Epiphysis lacking. 



Aletomeryx 



12 3 Average Antilo- 



Young 2 and 3 capra 



m. m. m. m. m. Eatio 



0410* -0455 -0469 -0462 -0776 1-68 



0255 -0270 -0277 -0273 -0430 1-57 



0190 -0236 -0250 -0243 -0315 1-30- 



0345 Not preserved. -0520 



0070 -0097 -0097 -0097 -0145 1.50 



0070 -0083 -0085 -0084 -0144 1.76 



Av. 1-56 



Cervicals III-V. — Cervical III, as in Antilocapra, lacks 

 the spinous process which begins to appear in cervical 

 IV, and is better developed in cervical V but is well at 

 the anterior end of the arch. It reaches its culmination 

 in vertebra VII. The principal distinction between cer- 

 vical V and the equivalent one of Antilocapra lies in the 

 position of the transverse process, which lies relatively 

 further forward in the fossil, and the foramen trans- 

 versarium is single instead of being paired. The verte- 

 bral spine is pronounced as in the other cervicals, and 

 tends to become cleft inferiorly. 



The dimensions of cervical V are as follows : 



