1921] Prick: Faunas of Bautista Creek and San Timoteo Carton 313 



Through the separation of the teeth along their main transverse valleys 

 and the resultant crumbling of the broken edges no positive evidence 

 remains of the presence or absence of accessory tubercles. These 

 usually occur in the teeth of the tapir at the inner and outer margins 

 of the transverse valley, and a slight protuberance of the broken' 

 enamel at the exterior corner of the valley of the first tooth may here 

 represent the remnant of such a tubercle. 



Measurements 



Tapirus 

 Tapirus haysii 

 Tapirus haysii Port Tapirus Tapirus Prota- 



merriami calif orni- Kennedy haysii terres- pirus 

 no. 23519 cus Cave Kentucky tris robustus 



Mj, transverse diameter of 



anterior crest 23.7 mm. 2] mm. 17 mm. 1.5.5 mm. 



Mj, transverse diameter of 

 posterior crest 22 



Mj, greatest anteroposter- 

 ior diameter (32.5) 29 21.5 21 



M.2, transverse diameter of 



anterior crest 23.6 17.8 22 22.3 18 17.5 



M.2, transverse diameter of 



posterior crest 20.5 17.5 



Ms, greatest anteroposter- 

 ior diameter (32.5) 25.3 31 27 22.-5 26 



Transverse width of post- 

 erior crest, per cent of 

 anterior 085 .091 



Comparisons. — The general structure of the teeth in specimen 

 23519 is markedly similar to that of the corresponding lower teeth of 

 Protapirus rohustus^^ of the John Day. They differ from the John 

 Day teeth in their greater size, proportionate depression of crown, 

 and the marked difference in the transverse widths of the anterior and 

 posterior ridges of the individual teeth. 



The specimens, so far as comparable, differ from T. liaysii califor- 

 nicus in their much greater size ; in the considerably greater relative 

 difference existing between the transverse diameter of the anterior and 

 the posterior main crests ; in the lesser development of the anterior 

 cingulum ; and the greater notching of the crests. Specimen 23519 

 agrees with T. haysii calif ornicus in the relative proportions of greatest 

 transverse tooth width to anteroposterior tooth length. 



18 Sinclair, Wm. J. Jour. Geol., vol. 9, 1901. Also type specimen of lower jaw 

 in the Univ. Calif. Coll. Vert. Pal. 



