2s2 The American Geologist. May, 1896 
In the inferior dentition of Daphcenus there are available 
for comparison 9. 3 and 1 and the succeeding molars. In Tern 
nocyon p. 3 is a simple tooth with somewhat elongated talon or 
heel, the posterior edge of the protoeonid descending more 
sharply than the anterior. In Daphcenus, however, the tooth 
is less simple, there being developed a minute metaconid and 
the anterior edge of the protoeonid descends more sharply 
than the posterior; the tooth, moreover, shows greater 
lateral compression and a more strongly marked cutting 
structure. The increase in size of pTl over pT5 is regular and 
proportionate to the increase between p~3 of T. altigenis over 
Daphcenus. The main cone does not incline backward and 
the anterior edge is less sharply inclined. The metaconid is 
developed to a greater height, with apex less obtuse than in 
the type of Temnocyon. The heel is rather flat arid the entire 
tooth shows greater lateral compression. 
The contour of the crown of mTI in Daphcenus is more like 
'/'. ferox than that in the type species, in this latter being 
very irregular with much compressed centres; the antero- 
posterior diameter is one-third less, a proportionate diminution. 
The hypoconid is nearer the middle of the tooth than it is in 
Daphcenus; the entoconid is very minute, if developed at all. 
The anterior position of the tooth closely resembles both 
species of Temnocyon under consideration, but the posterior 
more nearly that of the larger species. In fact, taking into 
consideration the proportionate difference in size and the 
fact that the entoconid, while being very minute, is propor- 
tionately more robust in Daphcenus, the tooth is nearly iden- 
tical with that of T. ferox. 
MT2 is equal in size to that of /'. <ilti<i<>,iis and, hence, is pro- 
portionately more robust. While the protoeonid in Temnocyon 
is developed near the middle of the tooth, it is in Daphcenus 
pushed anterior thereto, rising from the extreme anterior edge ; 
its height is equal to that in the type species. The hypoconid 
is however not so robustly developed in Daphcenus. This part 
of the tooth is noticeably elongate and in consequence the 
separating valley or groove is not so sharp as in /'. altigenis. 
MT3 is elongate and generally flat, the two cones being very 
minute, the anterior one slightly the larger ; the anteropos- 
terior diameter is -I mm, transverse 6 mm. The tooth overlaps 
,!,.-• at the posterior internal side. 
