NIMRAVID^. 1001 



M. 



Length of glenoid cavity (transversely) - 017 



Vertical diameter of orbit 025 



Length of base of canine 016 



Width of base of canine 017 



Length of diastema Oil 



Lengthof molar teeth on base 025 



Length of Pni. iii 006 



Length of sectorial 017 



The unique specimen of this species was found by Mr. J. L. Wortman 

 in the bad lands of Camp Creek, one of the head tributaries of the Crooked 

 River, in Central Oregon. 



• HOPLOPHONEUS STRIGIDENS Cope. 



American Naturalist, 1880, December, p. 851. Machwrodus strigidens Cope, Paleontological Bulletin, 

 No. 30, p. 9 (Dec. 3, 1878). Proceed. Amer. Philos. Soc, 1878, p. 71. 



Plate LXXVo; fig. 6. 



This obviously distinct species is only represented by the crown of a 

 superior canine tooth, from which the apex has been broken. Its charac- 

 ters are so peculiar that I have recorded it under the above name, not 

 knowing whether I shall have better specimens. 



The tooth is long and very much compressed, much more so than in 

 any species of the genus known to me. Its anterior and posterior edges 

 are finely and very perfectly denticulate, without lateral flexure near the 

 base. The center of each side of the tooth is occupied by a wide open 

 gutter, so that the greatest transverse diameter of the crown is not at its 

 middle. These gutters become planes towards the apex, giving an elon- 

 gated hexagonal section. The size indicates an animal of the proportions 

 of the H. cerebralis. 



As compared with the superior canine of the Dinidis squalidens, which 

 the present specimen resembles in its compression and fine denticulation, it 

 differs in its greater relative length and in the presence of the lateral open 

 sulci. 



^leasurements. 



M. 

 anteroposterior 0120 



' — S s:S""::-.::::::::::::::::::::::::::::::::::::::::::::;: :S 



Diameters at base 



Length of a denticle on base 000143 



