1926] Hall: Slull of the Bodent OtospermophUus giammurus heecJieiii 



387 



TABLE 4 



Measurements of Mandible — Different Ages Selected on Basis of Equal 

 Amounts of Increase in Occipito-nasal Length 



C 



E 



F 



J 



Q 



Amount of increase 

 Per cent of increase 



Greatest 

 length 



14.0 

 19.0 

 24 

 30.5 

 40.0 

 26.0 

 188 



Length 

 anterior 

 to Pm I 



5.0 



6.4 



8.2 



10 



12.0 



7.0 



140 



Distance 



between 



glenoid 



fossae 



9.0 

 15.0 

 17.0 

 20.0 

 27.0 

 18.0 

 200 



Greatest 

 thickness 

 below Pmj 



1.0 

 2 

 2.5 

 3.8 

 4.6 

 3.6 

 360 



Depth at 

 PniT 



2.5 

 4 2 

 5.0 

 7.0 

 9.3 

 6.8 

 272 



Height of 

 coronoid 

 process 



4. 



6. 



9. 



14. 



21. 



17. 



432 



c;^We^*v^ 



Figs. 28-39. Views of left maiuliMes. Figs. 28-33, nicdi;il view of mandi- 

 bles. Fig. 28, Q, X 1. Fig. 29, /, X 1. Fig. 30, F, X 1%. Fig. 31, E, X 11/2. 

 Fig. 32, C, X 1%. Fig. 33, B, X 3. Figs. 34-37, posterior view of mandibles. 

 Fig. 34, Q, X 1. Fig. 35, I, X 11/2. Fig. 36, F, X 1%. Fig. 37, E, X 314. 

 Figs. 38 and 39, dorsal view of mandibles. Fig. 38, Q. X V>. Fig. 39, E, 

 X 1%. 



