NO. 2025. CAMELS OF THE FOSSIL GENUS CAMELOPS^HAY. 273 



Measurements of the premolars and molars of the upper jazv. 



mm. 



Length of the premolar-molar series, pm.^ — m.^ inch:sive 171 



Length of the teeth, from front of pm.* to rear of m.^ 152 



Length of the molar series 129 



Pm.^, height. 



length 18. 8 



width - 11 



Pm.*, height 38 



length 25 



width 25 



M.i, height 35 



length 38. 5 



width 30 



M.2, height 57 



length ^8 



width 30 



M.^ height 62 



length on grinding surface -15 



length at middle of height 56 



width 28.5 



These measurements may be compared with those given by Merriam 

 on page 316 of his paper; but some of his measurements appear to 

 have been taken somewhat differently. If ui the Huerfano specimen 

 we measure the distance from the front of pm.* to the rear of m.^ along 

 the outer curve we shall have 167 mm.; and along the outer curve of 

 the molars alone, 138 mm. Merriam mentions the fact that in his 

 spechnen 20028 the metastyle of the last upper molar is drawn out 

 posteriorly as a wing; but that this wing is not present in the speci- 

 men 20040. In the Huerfano specimen this metastyle is large and is 

 bent strongly inward, as may be seen from figure 1, plate 26. The 

 width of this metastyle, from side to side, is 14 mm. Accompanymg 

 the materials from Minidoka is a third upper molar which had not yet 

 been cut, and whose base had not yet been completed. The metastyle 

 forms a broad sharp border, but shows no tendency to be bent mesiad. 

 The lower incisors of the Huerfano specimen are missing. They 

 are present in the two symphyses from Minidoka. Those of No. 5315 

 are shown in figure 2 of Plate 26. The outer incisors had only just 

 begun to wear. They have a length of 60 mm., a width of 13 mm. at 

 the middle of the length, and a thickness of 9 mm. The second in- 

 cisors are naturally more worn. They have a width of 18 mm. and a 

 thickness of 10 mm. at the middle of the length. The first mcisors are 

 about 17 mm. wide and 12 mm. thick. AU are flat on the upper sur- 

 face and convex from side to side on the lower, or front, surface. 

 They are relatively more powerful teeth than in the lama or the 

 dromedary. 



95278°— Proc.N.M.vol.46— 13 18 



