PLATE XXII. 



EQUUS BED. 



Figure 1. Testudo laticaudata, Cope; fragments of plastron, one-half natural 

 size; a. anterior lobe from below; 6, same from above; c, posterior lobe 

 from below; d, same from above. 



Figure 2. Testudo hexagonata, Cope; plastron from below; one-fourth natural 

 size. 



Figure 3. JEquus excelsus, Leidy; right half of inferior surface of cranium an- 

 terior to glenoid facet, seen from below; one-half natural size. From 

 specimen from San Diego, Texas, from W. Taylor, in collection of E. D. 

 Cope. 



Figure 4. Equus excelsus, Leidy; right superior molar, little worn grinding 

 face; natural size. 



Figures. Equus excetews, Leidy; right inferior molar, of probably the same 

 individual as that represented in figure 4; both from the Equus beds of 

 Eock Creek; 5a, same tooth from inner side; all natural size. 



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