216 MEMOIRS OF THE CARNEGIE MUSEUM 
reveal conditions more nearly identical with those found in Daphenus. Thus the 
posterior exit of the vertebrarterial canal is not superior asin the dogs, but more 
nearly posterior as in the cats; the anterior cotyles are small; the transverse 
Fia. 5. Atlas of D. superbus. 4 nat. size. 1, dorsal view ; 2, lateral view ; 3, ventral view. 
diameter of the articulation for the axis is proportionally less in size; and the bone, 
with the exception of the transverse process, is, as a whole, rather heavier than in 
Canis. The atlanteo-diapophysical notch is deep and as in the dogs is not covered 
with a bony bridge to form a foramen. ‘This character was observed in Daphenus 
by Professor Scott," while in some of the genera of the Mia- 
cidx ( Oodectes) this notch was already converted into a fora- 
men.” The foramen in the arterial groove, which pierces 
the wall of the neural arch on the ventral face of the trans- 
Fic. 6. Atlas of Cynodes- 
mus brachypus Cope. No. 8140, 
Cope Collection, Am. Museum the atlas of Daphanus here used for comparison. In Canis 
Natural History. 4 nat. size. 
verse process, is exceedingly small, which is also the case in 
this foramen is of larger size. 
In the atlas of Cynodesmus brachypus the posterior exit of the vertebrarterial 
canal is more dorsally located (see Fig. 6); its atlantal notch is not nearly so deep 
and the foramen piercing the neural arch on the ventral face of the transverse proc- 
ess is as large as in Canis. 
MEASUREMENTS OF ATLAS. 
Greatest antero-posterior diameter.. 
Greatest transverse diameter.. 
Antero-posterior diameter at cotyles.. 39 
Drptisvornd CiAMObeh OliGOby OS ANOLON) Y.. 7b sipcecbiepedisssesssesesdsel Reise ee seed yeessceendutvedsshecestenteest 51 
TNERUBVELSOMAMELEL Oli COLY IES POSLOLIONLY.sv...ccvcsrsvasecvojecsuselscasdesvacstsssevecsetsssauedsvocnteessssieaes ie 36 
Azis. — In comparison with Camis the axis is short and high and according to 
Professor Scott’s description of the axis in Daphanus it appears also to differ from 
that genus in some important and rather surprising details. Scott says: “The cen- 
10 Wortman, J. L., ‘‘ Osteology of Patriofelis,’’ Bull. Am. Mus. Nat. Hist., Vol. VI, p. 137, 1894. 
11*“ Notes on the Canide of the White River Oligocene,’’ Trans. Amer. Philos. Society, Vol. XIX, p. 337, 1894. 
Matthew, W. D., “Carnivora and Insectivora of the Bridger Basin,’? Memoirs Am. Mus. Nat. Hist., Vol. 
IX, p. 367, 1909. 
