i-J 



DINOCERATA. 



In the lower jaws of all the known Diiiocerutd, there are three well- 

 developed incisors on each side. Thev are inserted, each l)v a single root, 

 and are procumbent, all directed well forward. Their inner surfaces 



Figure 43. — Incisor of Dinoceras mirabUe, Marsh (No. 1191). 

 Figure 44 — Incisor of Dinoceras mirahile (No. 1492). 

 Figure 45. — Incisor of Dinoceras miraliile CSo. 1490). 



a. side view; h. top view ; c. antero-posterior view. 



All the figures are of n.Tdiral size. 



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