PETERSON : NEW CARNIVORES FROM MIOCENE OF WESTERN NEBRASKA 225 
and the zygapophyses and neural spines, especially of the thirteenth dorsal, 
are 
typically lumbar in character. 
MEASUREMENTS OF TWELFTH AND THIRTEENTH DORSAL VERTEBRA. 
Die Dz 18 
Mm. Mm. 
Anterd-Posterior CIAMOLER OLGNUNG. ass. csresssca-Ceeceeecssaseecsteseslvscces evrheiasteredtereassenteeee 28 29 
Transverse diameter of centra posteriorly . . 26 27 
Vertical diameter of centra posteriorly.. be lf 19 
Transverse diameter at transverse processes.... Ok 33 
Heigith Of neUralspiriehiccse cavesin (eset css sSevnsutes tas sueeslceetansvavvedseceesesncosararthrese sericea 25 
First Lwmbar Vertebra. — The first lumbar vertebra is slightly larger 
last dorsal. Besides the absence of facets for ribs it also 
differs from the latter in having a sharper ventral keel, bet- 
than the 
ter developed lateral tubercles on the ventral posterior face 
of the centrum, larger transverse processes, which are placed 
lower down, and a slightly heavier neural spine. In Dapha- 
nus felinus the lumbar vertebree have relatively longer and 
narrower centra, with the ventral keel and lateral posterior — F1¢. 19. First Lumbar Ver- 
: tebra of D.superbus. } nat.size. 
tubercles of greater prominence, longer transverse processes, 
and the neural spines possibly somewhat higher than in the present genus. 
MEASUREMENTS OF First LUMBAR VERTEBRA. 
Mm. 
Antero-posterior diameter of centrum. . 33 
Transverse diameter of centrum . 
i Vertical diameter of centrum .... 
Transverse diameter at transverse processes, approximately, 
Height of neural spine 
TR Bdaoichin obo vee Uad suey ot Serer ea Raee eR ee ERT SNES cote 45 
Fia. 20. Lumbar Vertebra of D. superbus. 4 nat. size. 1, second lumbar ; 2, third Jumbar ; 3, fifth lumbar. 
Second, Third, Fourth, and Fifth Lumbar Vertebrx. —'This series of the lumbars 
may conveniently be described together. Their centra are broad and heavy, not 
unlike those in OCunis, while the transverse processes, though quite heavy and 
directed forward, are much shorter than in the latter genus. 
The latter character 
