360 ROY L. MOODIE 
(Canidae), a difference which may be briefly stated as largely con- 
sisting in the much greater relative size of lobes in the modern species. 
In Daphaenus the brain is narrow and tapers rapidly toward the 
anterior end; the cerebellum and medulla oblongata are long, the 
hemispheres narrow and short, and the olfactory lobes very large. 
The partially exposed cast of the cerebral fossa shows that the cerebral 
convolutions are fewer, simpler and straighter than in any known 
species of Canis and are even more primitive than those of Cynodesmus 
(figured by Scott in Trans. Amer. Philos. Soc., xvii, 1394, pl. 1, fig. 2). ° 
The only sulcus visible in the specimen is apparently the suprasylvian, 
which is short and pursues a nearly straight course, but curving down- 
ward slightly at both ends. From the external character of the skull 
it is clear that the hemispheres overlap the cerebellum but little. 
The dorsal aspect of the present endocranial cast of Daphaenus 
confirms Scott’s discussion. The lateral sulcus is almost straight 
and runs, without complexity, almost parallel with the sagittal 
sinus. Lying below the lateral sulcus and running almost parallel 
with it is the ectolateral sulcus which is slightly bent in its course 
by the broad sylvian fossa, at which point it is joied by the 
suprasylvian sulcus. On account of weathering, these are the 
only features observable on this cerebral cast. Length of entire 
cast is 74 mm., length of cerebrum is 52 mm., width of cerebrum 
is 43 mm. 
The cerebrum of Daphaenus overhangs the cerebellum to 
some extent, but to a much less degree than in Aenocyon (fig. 14) 
or any of the modern cynoid Carnivora. 
The lobules of the cerebellum (fig. 12) are clearly indicated 
and these have been identified according to the terminology 
proposed by Bolk (’06), following the suggestion of Black for 
the adoption of a uniform terminology. The eroded condition 
of the specimen prevents the accurate determination of many 
minor features, but the lobus anterior is not hidden, except a 
slight anterior portion, by the cerebrum. In fact, a comparison 
of the cerebella of Daphaenus and Aenocyon shows what an 
enormous advance the Pleistocene form has undergone. The 
sulcus primarius is indicated by a depression, but its identity 
is uncertain. The lobulus simplex is hard to differentiate from 
the lobus posterior. A lobulus paramedianus is prominent, but 
without details of structure. The condition of this lobule is 
