PANTODOXTA. 557 



the inner convex extremity of the crown. Similar ridges are prominent in 

 the corresponding part of the crown of the last superior molar. The last 

 inferior molar has a distinct but rather narrow posterior heel, and there is 

 110 accessory tubercle or accessory ridge as in the typical species of Cory- 

 j)hodon. 



The size of this species is about that of the Bathnodon radians. 



Measurements of the teeth. 



No. 1. 



M. 



Total length of .superior incisor 0.'57 



Leu<;th of crown (inner face) superior incisor 015 



Will I h of crown (oblique) superior incisor 0"20 



Width of crown (oblique) inferior incisor — 0^-' 



Length of crown (inner face) superior incisor 018 



"Width of posterior molar 0:59 



Length of posterior molar 028 



Elevation of posterior crest of molar 010 



Width of anterior true molar O.iS 



"Width of premolar 028 



Length of premolar 0.1.5 



Length of premolar (tirst) 016 



AVidth of premolar (first) 008 



Length of premolar (inferior) 024 



AVidth of premolar (inferior) 02U 



No. 2. 



"Width of superior canine .030 from apex 020 



"Width of inferior canine at external base 028 



_. ^ r XL ^ • _, 1 < anteroposterior 033 



Diameters of first superior molar { , "^ „.,_ 



< transverse "•'' 



Width of last lower molar 023 



Length of last lower molar 037 



MtTALOPHODON TESTIS Cope. 

 Paleoiitological Bulletin, 34, Feb., 1882, p. 175. Proceed. Amer. Philo. Soc, 1881, Dec, 175. 



PlateXLIVa; fig. 13. 



The genus MetalopJwdon was described by me in 1872. Up to De- 

 cember, 1881, it had remained without further illustration of importance, 

 as no good specimens of it had been obtained by any of my expeditions up 

 to that year. The material then obtained consists of the entire superior 

 molar series of the right side, and the superior molars of the left side, in 

 beautiful preservation. These display the characters on which the genus 

 was proposed, i. e, the conversion of the posterior external V of the second 



