78 memoirs of the carnegie museum 



Measurements. 



Length of premolar-molar aeries from base of canine 76 mm. 



Length of molar series 38 " 



Fore and aft diameter of canine at base 12 " 



Transverse diameter of canine 9 " 



Length of sectorial (No. 553) 16 " 



Width of anterior portion of sectorial (No. 553) 10 " 



Antero-posterior diameter of M.i (No. 553) 11 " 



Greatest transverse diameter of M.i(No.553) 17 " 



Inferior Dentition. — With the exception of the incisors and P.2 all the lower 

 teeth are well preserved on one side or the other in No. 492. Neither the incisors 

 nor their alveoli are preserved in our material, so that in giving the dental formula 

 I have followed Leidy and Scott as to the number of lower incisors. The canines 

 like those of the upper jaw are stout and without cutting edges. P.y is a very small 

 tooth fixed in the jaw by only one root, which is directed obliquely backward. 

 There is a rather high cusp on the anterior portion of the crown of this tooth. 

 P.y is separated from the canine and the succeeding premolar by considerable dia- 

 stemata. P.2- is represented by only the fangs. P.^ is separated from the preced- 

 ing tooth by a short diastema, but is in contact with P.^. It bears a single median 

 cone and has the posterior portion somewhat stronger than the anterior. There is 

 a faint indication of a basal cingulum about the posterior border. P.^ is in contact 

 with P. 3 and M.y. It bears a prominent median cone and a well-defined posterior 

 conule. There is a basal cingulum about the postero-external border of this tooth 

 and the heel is considerably broader than the anterior portion, a character not well 

 shown in the drawing reproduced in PL XVI., Fig. 4. The sectorial is well pre- 

 served in either ramus. The trigon is high and the heel low and flat. The ex- 

 ternal cusp of the trigon is much the highest and most prominent of the three, 

 while the internal and anterior are of equal height, although the latter is much 

 the stronger of the two. The external cusp of the talon is low and broad while the 

 internal is faint or obsolete. There is an external basal cingulum. The crown of 

 M.g, as shown in Fig. 5, has the same general pattern as the sectorial 

 i except that the trigon is much lower. As in that tooth there are 

 Fig. 5. Crown three anterior cones forming a low trigon and a single posterior cone 

 viewof right M.J ^^ ^j^^ heel. The last mentioned cone occupies a more median posi- 



ot Daphcenus feli- 



nus (No 492) ^^^^^ than docs the corresponding cone of the sectorial, while the 

 trigon is much lower and the cusps forming it are all of equal height, 

 though the external is much stronger than the internal and anterior. M.g is a con- 

 vex rounded nub with a low central cone and a slightly elevated posterior cingulum. 



