520 



University of California Publications in Geology [Vol. ll 



The upper cheek-tooth dentition is represented only by scattered 

 teeth (figs. 126, 127) which do not differ materially from those of 

 the form from the Santa Fe beds referred to M. necatus by Cope. 



131b 



Figs. 126 to 132. Mcrycodus necatus? Leidv. Superior and inferior teeth, 

 natural size. Fig. 126, M 1 and M 2 , no. 22504; fig. 127, M 2 , no. 22506; fig. 128, 

 jaw fragment with P 3 to M„ no. 22507; fig. 129, M 3 , no. 22505; fig. 130, M 3 , no. 

 21490; figs. 131a and 131b, fragment of mandible with inferior molars and P 4 , 

 outer and inner views of mandible and teeth, no. 22503 ; fig. 132, fragment of 

 mandible with Dm,, no. 21491. Barstow Miocene, Mohave Desert, California. 



In the milk dentition Dm 4 possesses a large anterior lobe at least 

 equaling that of Capromeryx in relative size compared with the 

 middle lobe. 



The limb elements are represented by numerous scattered bones 

 of the manus and pes with portions of the larger bones. 



