370 



University of California Publications in Geology 



[Vol. 12 



Description. — The teeth (figs. 74 aud 81) are considerably worn, 

 and, perhaps, as a character due to age, have the appearance of being 

 moved diagonally forward, the inner, posterior edge of one molar pro- 

 jecting beyond the corresponding anterior edge of the next posterior 

 tooth. The crowns are comparatively short and broad. The heel and 

 central lobe of the relatively large third molar are broken. The pres- 

 ence of the usual camelid buttress is suggested at the anterior external 

 corner of the last molar by the remnant of a fold in the broken enamel. 

 The last premolar is a well developed tooth, the form indicating the 

 presence of double crescents in the less worn state. Premolar three is 

 small and double rooted. The smooth, knife-like sulcus points to the 

 total absence of the second premolar. The anterior lateral portion of 

 the mandible, which is somewhat broken away, exhibits two caniniform 

 alveoli lying end to end. The usual posterior inclination of the first 

 premolar, however, may have resulted in a slight diastema occurring 

 between it and the canine in the unbroken edge. The second incisor 

 is also represented by the alveolus. A mental foramen is situated 

 below the posterior edge of the first premolar. 



Description of referred specimen. — No. 6728 (fig. 75) consists of 

 the posterior portion of a right mandible with portions of the last 

 molar and the alveolus of Mj. The two lobes remaining of IMg are 

 similar in size to the type specimen (no. 23428). No suggestion exists 

 of the usual camelid buttress that is distinctly suggested in the type 

 specimen. 



- PROCAMELUS(?) EDENSIS RAKI, n. sp. 



Type. — A premolar-molar series from the left side of the lower jaw, Univ. 

 Calif. Coll. Vert. Pal. no. 23423 (figs. 76, 83), Univ. Calif, loc. 3269. 



Eef erred material. — A second and slightly larger cheek tooth series, contained 

 in the portion of a mandible from the left side, no. 23427 (figs. 77, 82); a third 

 series 1050 (fig. 78), from the right side; portions of two series, no. 23771 (fig. 

 79), from the left side of the jaw. three lower molars, nos, 23436, 23438, and 

 23438a (figs. 84o-84c). All specimens in Univ. Calif. Coll. Vert. Pal., and from 

 Univ. Calif, loe. 3269. 



Characters. — The general small size of the teeth, together with the 

 narrowness of Pj; the relatively short anteroposterior length of the 

 series ; and the presence of a marked, inwardly sloping buttress at 

 the anteroexternal angle of M3. 



