476 MEMOIRS OF THE CARNEGIE MUSEUM. 



EXPLANATION OF PLATE LXVI. 



Fig. 1. Diceratherium anneclens, hypotype, Side view of skull, American Museum, 

 No. 7324, Cope Coll. 



Fig. 2. Diceratherium cooki, upper contour of lower jaws and crown view of den- 

 tition. Carnegie Museum, No. 2499. 



Fig. 3. Diceratherium cooki, outer view of mandible in very young stage of develop- 

 ment. Carnegie Museum, No. 1820. 



Fig. 4. Diceratherium cooki, outer view of mandible of fully adult male. Carnegie 

 Museum, No. 2499. 



Fig. 5. Diceratherium cooki, alveolar border of lower jaw and crown view of den- 

 tition. Carnegie Museum, No. 1923a. 



Fig. 6. Diceratherium cooki, alveolar border of lower jaw and crown view of den- 

 tition. Carnegie Museum, No. 1841. 



Fig. 7. Diceratherium cooki, alveolar border and crown view of dentition. Carnegie 

 Museum, No. 2476. 



Fig. 8. Diceratherium cooki, inner view of mandible, very young stage of develop- 

 ment, Carnegie Museum, No. 1820. 



Fig. 9. Diceratherium cooki, upper contour of lower jaw and crown view of den- 

 tition, same as Nos. 3 and 8. 



Fig. 1 is I natural size; Figs. 2 and 4 are | natural size; Figs. 3, 5, 6, 7, 8, and 9 are 



1 



2 



- natural size. 



