REFERENCES TO THE PLATES. 457 



PLATE VI. 



Figures of the natural size. 

 Fig. 1. Oeeodon Culbertsoni. See page 86. 

 Left lateral view of a remarkably well preserved skull. 

 Figs. 2, .3. Oreodon gracilis. See page 94. 



Right lateral and upper views of a remarkably well preserved skull. 



The originals of these figures are nearly as perfect as represented; several salient points alone being 

 lost, and a comparatively few fractures existing. 



PLATE VII. 



Figures of the natural size. 



Fig. 1. Oreodon major. See page 99. 



Inferior view of the right half of a remarkably well preserved skull. Points imperfect in the original 

 have been mainly restored from the opposite side, and partly from other specimens. 



Fig. 2. Oreodon Culbertsoni. See page 86. 



Upper view of the left half of a remarkably well preserved skull, but slightly restored from other 

 specimens. 



PLATE VIII. 



Oreodon major. See page 99. Of the natural size. 



Fig. 1. View of the left side of a remarkably well preserved skull, slightly restored from the oppo- 

 site side and from other specimens. 

 Fig. 2. Upper view of the same. 



PLATE IX. 



Figures of th.e natural size. 



Figs. 1, 2. Oreodon Culbertsoni. See page 86. 



Upper views of two skulls. The supra-orbital foramina, usually two or three lines apart in the spe- 

 cies, in the specimen of Fig. 1 are half an inch apart. In another specimen they are three-fourths of 

 an inch apart. 



Fig. 3. Variety of 0. gracilis? Oreodon affinis. See page 105. 



Upper view of the facial portion of a skull. 



Fig. 4. Variety of O. major? Oreodon hybridus. See page 105. 



Upper view of the facial j)ortion of a skull. 



Fig. 5. Procamelus occidentalis. See page 157. 



Symphysial fragment of a lower jaw. The original contains both canines, the median incisors, and 

 the left lateral one. In the figure a second lateral incisor is introduced from an isolated specimen be- 

 longing to another individual. 



PLATE X. 



Merycochcerus proprius. See jjage 110. 



Figures 1, 2, about two-thirds the diameter of nature; the remainder of the natural size. 

 Fig. 1. Left side of the upjicr jaw, consisting of the greater part of the maxilla, the premaxilla, and 

 parts of the malar and lachrymal. It contains a full series of teeth, but the lateral incisor, the first 



58 



