EXTINCT MUSTELINE OF NORTH AMERICA. 17 



posterior coronal lobe, but exhibit small basal lobes, both an- 

 terior and posterior. The anterior of the second is rather 

 elevated, and the entire crown is directed obliquely forwards. 

 Canine compressed. Mental foramina below the second and 



third premolars. 



'' Measurements. 



M. 



" Leugth of three premolars 006 



" Elevation of anterior lobe of sectorial 002 



" Depth of ramus at anterior lobe of sectorial 003 



" This species is of smaller size than the M. miistelinus, Cope, 

 and the sectorial tooth less elevated and trenchant." — {Orig. 



descr.) 



3. Galera macrodon, Cope. 



Oalera macrodon, Cope, Proc. Phila. Acad. Xat. Sci. 1869, 155 (see also l-38).—Leidy, 

 Extinct Mamrn. Dak. Nebr. 1869, 369, pi. xxx. f. 1, 2, 3. 



Post-pliocene deposits in Charles County, Maryland, asso- 

 ciated with remains of Dicotyles torquatus and a Manatus. 



" This species is based on the greater portion of the right 

 ramus of the mandible of an adult, containing three molars in 

 place, the alveolae [sc. alveoli] of the first and of the last, with 

 a considerable portion of that of the canine. 



" The alveolus indicates a canine of large size. The basis of 

 the first premolar is turned obliquely outwards, and is two- 

 rooted. The second and third premolars are separated by a 

 space: they have well-marked cingula, but neither posterior 

 nor Internal tubercles. The sectorial is elongate, more than 

 twice as long as wide, the inner tubercle well-marked, acute, 

 the posterior lobe flattened, elongate ; anterior lobe narrowed. 

 Alveolus of the tubercular molar longitudinal, receiving a 

 flattened fang with a groove on each side. Inferior face of 

 ramustbelow anterior line of coronoid process, broad rounded, 

 turned j^outwards. Masseteric ridge only reaching the latter 

 below near the apex of the coronoid process, and not extend- 

 ing anterior to the line of the posterior margin of the tuber- 

 cular molar. Ramus narrow at first premolar. 



In. Liu. 

 " Length of ramus from posterior margin of canine to ditto of tu- 

 bercular 1 5. 5 



" Ditto to posterior margin sectorial 1 3. 



'•' Ditto third premolar 3. 75 



" Ditto sectorial molar 6. 



''Width of same (posterior lobe) 2.8 



" Depth ramus at posterior margin first premolar 7. 5 



" Ditto ramus at posterior margin sectorial 8. 25 



" Widtb|ramus at posterior margin symphysis 4.5 



2m 



