DY) 
306 NOTES ON THE CANIDE OF THE WHITE RIVER OLIGOCENE. 
hemispheres narrow and short, and the olfactory lobes very large. The partially exposed 
cast of the cerebral fossa shows that the cerebral conyolutions are fewer, simpler and 
straighter than in any known species of Canis, and are even more primitive than those of 
Cynodesmus (see Scott, 94, Pl. I, Fig. 2). The only sulcus visible in the specimen is 
apparently the suprasylyian, which is short and pursues a nearly straight course, but 
curving downward slightly at both ends. From the external character of the skull it is 
clear that the hemispheres overlap the cerebellum but little. 
Measurements. 
| No. 11421. No, 11424, No. 10538. No, 11423. No. 11425. No. 11422. 
SSP RTIUL, Teta AoococoonnacanonsooasDanos0n59600R9cnooDKoHAEaoCOND0be 20.151 
Cranium, length fr. occ. condyles to preorbital border) 108 
Face, length in front of Orbits ..-----....-ssseseeeeneresseeee 065 ?.050 073 
Zygomatie arch, length 080 
Talkie, Mei ERH] A, s0sq000ds00s 9 onoopoDAdSIHODDGaNONDSACOSEGsNd0000000 076 092 
GE WAKGlidn th 7D SoosocopenccocccoddadaqnocdonoocDecqas2000000 .044* 047%) 052 
Mandible, length from chin to masseteric fossa.........|  .084 | -093 -096 2.079 
a -020 -018 -023 -025 025 
se 0175 0:5 017 020 019 
$ 010 .009 | -010 012 012 
* Approximate. 
I. Tur Verresrat Conumn. 
The vertebral column is remarkable in many ways. All the regions of the column 
are well represented by several specimens of D. vetws and D. hartshornianus, but no com- 
plete backbone belonging to a single individual has as yet been recovered. 
Cervical Vertebre. The collection contains only a single imperfect specimen of the 
atlas and this belongs to D. vetus. Imperfect as it is, this atlas displays some important 
differences from that of Canis and most of these differences are approximations to the 
feline and yiyerrine types of structure. In Daphenus the atlas is elongate in the 
antero-posterior direction, the anterior cotyles are small and only moderately concaye, 
and are somewhat more widely separated on the ventral side than in Canis. When 
viewed from aboye, the cotyles are seen not to project so far in front of the neural arch 
as in the cats, but farther than in the dogs. The posterior cotyles for the axis are small, 
nearly plane, and but slightly oblique in position, with reference to the fore-and-aft 
median line of the vertebra. These cotyles are more distinctly separated from the 
articular surface for the odontoid process of the axis than in the modern dogs, in which 
