274 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



The incisors of No. 2579, from Minidoka, are still more worn than 

 those just described, and they belonged to a larger animal. Those of 

 the first pair, in their worn condition, are at least 73 mm. long. All 

 these incisors were directed forward more strongly than in the lama 

 and the Bactrian camel, as the latter is represented in the specimen at 

 hand. It must be stated further, that the lateral incisors of figure 2, 

 Plate 26, are, relatively to the others, much larger than in Cope's 

 specimen from Texas. ^ None of these m- 

 cisors are as strongly curved as they are 

 in the lama. 



Figures 3 and 4, Plate 26, represent of 

 the natural size the two incisors, i.2 and i.g 

 right side, which were found in 1867 by 

 E. L. Berthoud. It is, of course, not 

 certain that they belonged to Cam.elops, 

 but it is probable that they did. These 

 teeth are spatulate in form, not greatly 

 curved, and are somewhat twisted. What 

 is taken to be the second right incisor 

 (Plate 26, fig. 4) is worn very slightly ; the 

 other incisor (fig. 3) not all. I., has a 

 length, in a straight line, of 92 mm.; a 

 width of 23 mm. near the anterior end; 

 while at the middle of the length, the 

 width is 18 mm.; the thickness 10.5 mm. 

 A section of the tooth at this place would 

 greatly resemble that of the corresponding 

 tooth from Minidoka. 1. 3 had not quite 

 completed its growth at the base. It is 

 80 mm. long, 26 mm. \vide near the front; 

 21 mm. wide and 10 mm. thick at the 

 middle of the length. 



As in other specimens supposed to be- 

 long to Camelops, the lower jaw of the 

 Huerfano skuU has present no traces of 

 any premolars in front of the fourth. In a part of a jaw (Plate 26, 

 fig. 5) from Minidoka, which belongs possibly with the symphysis 

 numbered 5315, there is left the base of the crown and the root of 

 a small third premolar. This has a diameter of 7 mm., fore and aft, 

 and a transverse diameter of 6 mm. In the anterior border of the 

 fourth premolar there is a groove which appears to have been occupied 

 by the crown of this third premolar. 



Fig. 1.— Molars (m') and premolars 



(pm^) OF LO"WER JAWS OF THE TYPE 

 OF CAMELOPS HUERFANENSIS. X |. 



1 Geol. Surv. Texas, 4th Ann. Rept., 1892, pi. 21, fig. 4. 



