MERRIAM: THE FAUNA OF RANCHO LA BREA. 



233 



- 0,- 



^ be fl 

 . cs 



P 3 , greatest anteroposterior diam- 

 eter 



P 3 . greatest transverse diameter ... 



P 4 , greatest anteroposterior diam- 

 eter 



P\ greatest transverse diameter 

 across deuterocone 



P 4 , greatest transverse diameter 

 across protocone 



M 1 . greatest anteroposterior diam- 

 eter 



M', greatest transverse diameter.. 



M 1 , transverse diameter of proto- 

 cone 



M 2 , greatest anteroposterior diam- 

 eter 



M-, greatest transverse diameter.... 



a;> approximate. 



* Without posterior enamel. 



{ Without enamel. 



19 



32 



16.2 



13 



20 

 24 



13.6 



10 

 15.4 



a 



18.1 18.2 16.5 



7.9 8 



30.7 32 ap 24.5 



15 14.5 ap 14 



13 11 



18.7 18.5* 17.5 



23 21.5 22.5 



12.6 



9.2 10 10 



14.4 14.9$ 14 



S a 01 



o ~ C - 

 o eg - -r 



17.33 



18.5 



8 



18 20 



23 21.3 25 



10.8 

 14.6 



17.5 

 7.4 



16.4 

 20.7 



12.7 



9 

 12.9 



MILTC DENTITION 



The milk dentition is well shown in several specimens. In no. 10831 it 

 presents the following characters : The superior temporary carnassial (figs. 12 

 and 13) has well-developed cutting blades; the inner root is situated almost 



13 



15 



Pigs. 32 to 15. Canix dims Leidy. Milk dentition. Figs. 12 and 13, no. 19475, natural size; figs. 14 and 15, 

 no. 19481, natural size. Fig. 12, upper milk earnassial, inner side; fig. 13, upper milk carnassial and tuber- 

 cular milk molar, occhisal view; fig. 14, lower milk carnassial and preceding tooth, inner side; fig. 15, 

 lower milk carnassial, occlusal view. Rancho La Brea Beds. 



directly above the apex of the protocone ; there seems to have been no deuter- 

 ocone present upon the base of the inner root, but there is a minute tubercle 

 on the cingtilum a short distance in advance of the base of this root, and nearer 

 the normal position of the deuterocone on the permanent carnassial. In the 

 inferior milk carnassial (figs. 14 and 15) the cutting blades are well-developed 



