FREE INSTITUTE OF SCIENCE 



PROCAMEI.US 



The associated teeth, mostly isolated specimens, in size are nearly all 

 correlated with the bones of the larger species, but in comparison with those of 

 the Camel, while they generally seem too small for the largest extinct Llama, 

 they on the other hand seem too large for the second-sized species indicated 

 by the bones. 



A number of well-preserved molar teeth though detached from one 

 another have every appearance of having belonged to the same individual, 

 and these indicate the continuous series, below as well as above, to have been 

 five in number. The true molars are like those of the Camel, and approximate 

 them in size, while the premolars are larger, with the first of the series better 

 developed, and in both jaws equally permanent with the rest. 



The comparative measurements of the teeth with those of a Camel are as 

 follows : 



Fossil teeth. Recent Camel. 



Diameters. Upper. Lower. Upper. Lower. 



Fore and aft, last molar . 40 mm. 50 mm. 40 mm. 49 mm. 



Transverse, last molar . . 33 " 23 " 25 " 21 " 



Fore and aft, second molar . - 37 " 36 " 39 " 37 " 



Transverse, second molar . . 32 " 23 " 28 " 22 " 



Fore and aft, first molar . 33 " 3 2 " 3 " 37 " 



Transverse, first molar . . 31 " 21 " 27 " 21 " 



Fore and aft, last premolar . . 25 " 22 " 22 " 21 " 



Transverse, last premolar . . 25 " 14 " 22 " 12 " 



Fore and aft, penultimate premolar 23 " 17 " 17 " 



Transverse, penultimate premolar 16 " 14 " 9 " 



The fossil molar teeth just indicated give together continuous series a 

 little longer than in the Camel, though they seem hardly large enough to 

 belong to the largest species of Avchenia indicated by the largest associated 

 bones, and yet too large for the second-sized species indicated by other bones, 

 so that it is uncertain whether they belong to either of these or to a third 

 species of intermediate size. 



A last upper molar tooth moderately worn and two teeth from another 

 individual, consisting of a much-worn first upper molar and the outer portion 

 of the preceding premolar, are larger than the corresponding teeth of the 

 former lot, and more probably belong to the largest species, P. major, indicated 

 by the accompanying bones. 



