No. 2324. PECCARIES FROM CUMBERLAND CAVE—GIDLEY. 675 



Measurements of M. pennsylvanicus. Type — . (From Leidy's report) — mm. 



Length of symphysis in front 70 



Depth of jaw before first molar 30 



Thickness of jaw below first molar 30 



Width of jaw below first molar 57 



Width of symphysis at narrowest point 20 



MYLOHYUS TETRAGONUS Cope. 



Mylohyus tetragonus Cope, Journ. Acad. Nat. Sci., Philadelphia, ser. 2, vol. 9, 

 1899, p. 260. 



Type. — " An imperfect left mandibular ramus with the correspond- 

 ing part of the symphyseal region," containing the canine, three 

 milk-molars, and two true molars. 



Locality. — Port Kennedy bone deposit. Upper Merion Township, 

 Montgomery County, Pennsylvania. 



Diagnosis. — The chief distinguishing feature of this species as de- 

 scribed by Cope is the form of the canine, which has the internal pos- 

 terior angle truncated, giving a tetragonal cross section to this tooth. 

 But this character is so unusual for any suilline I am inclined to con- 

 sider it pathological. The species, however, seems to differ from M. 

 pennsylvanicus (with which it agrees only in size), and likewise 

 from all other described species, in the relatively shorter space or 

 diastema between the canine and the cheek-teeth, indicating a com- 

 paratively short-nosed species. 



Measurements (after Cope) — ■ mm. 



Length of diastema 'Jl2-J-'i 63 



Anteroposterior diameter of c 10 



Transverse diameter of c 6 



Length of cheek-tooth series from dps to ma 77 



Anteroposterior diameter of ps (=pm2 of Cope) 14 



Transverse diameter of pa 10 



Anteroposterior diameter of p4 (=pmi of Cope) 15 



Transverse diameter of p* 13 



Anteroposterior diameter of mi 16 



Transverse diameter of mi 13 



Antroposterior diameter of m2 18 



Transverse diameter of m2 14. .5 



MYLOHYUS BROWNI, new species. 



Mylohyus sp. a, Brown, Mem. Amer. Mus, Nat. Hist, vol. 9, pt. 4, 1908, p. 

 201, pi. 24. 



Type. — A left lower jaw with symphyseal portion of both sides at- 

 tached (Cat. No. 11810, Amer. Mus. Nat. Hist. Coll.). 



Type locality. — Fifteen miles south of Harrison, near the northern 

 line of Newton County, Arkansas. 



Diagnosis. — According to Brown, "agrees in dental characters with 

 M. tetragonus with the exception of the canine. This tooth has 

 only three planes, as in Tayassu^ whereas in M, tetragonus it is 



