SCOTT : LITOPTERNA OF THE SANTA CRUZ BEDS. 



43 



to the plane of the paracone. Apparently there is no trace of the postero- 

 internal cusp, or hypocone, the posterior cingulum curving upward at a 

 right angle upon the posterior edge of the protocone, the inner side of 

 which is strongly convex. 



The lower molars are very broad and heavy, with massive cusps and 

 shallow valleys, especially of the anterior crescents ; the postero-internal 

 crescent is thick and blunt, and the talon of ms^ large. 



In the following table No. 33 is the co-type already referred to ; No. 34 

 is a cast of a mandible referred to this species ; No. 36 is a cast of the 

 type of L. granatuni and No. 39 is also a cast referred to the same species. 

 No. 9271 is the facial portion of the skull of a very old individual, in the 

 collection of the American Museum of Natural History ; the small size of 

 the tusks indicates that this was probably a female. 





Measurements. 













No. 



No. 



No. 



No. 



No. 



No. 





33- 



34- 



36. 



39- 



9271. 



15,309 



Upper dentition, length . 











.128 





" incisor, greater diameter 











.008 





" " lesser " 











.006 





" premolar-molar series, length . 











.091 





" premolar series, length . 











.047 





P-2-, length {i. e., ant.-post. diameter) . 











.012 





" width (i. e., transverse diameter) . 











•013s 





P^, length 











•013 





" width 











.016 





PA, length 











.014 





" width 











.017 





Upper molar series, length 











.044 





Ml, length . . . ... 











.013 





" width 











.019 





M^, length 



.017 









.016 





" width 



.023 









.022 





M-^, length . . . . 



.013 









.014 





" width 



.022 









.021 





Lower lateral incisor, greater diameter. 





.007 





.009 







it tc ft leqQPr " 





.005 





.0055 







Lower premolar-molar series, length 





.096 



.097 



.101 







" premolar series, length . 





.048 



.049 



.051 







Pt, length 









.010 







" width ■. . . 









.005 







P2. length 





.014 





.013 







