PLATE L. 



Fig. 1. — Crauium in front of mastoid process of Palaeosyops laevidens Copi'. Oup-half natural size. 

 Page 701. 



Fig. 2. — Maxillary and canine teeth of tlic right side, from below, natural size. The matrix was not 

 removed from the inner side of the preiiinlars when this plate was drawn. The second has aa inter- 

 nal lobe as usual. 



Fig. 3. — Maxillary teeth of another iudividual (from Mammoth Buttes), natural size. 



Fig. 4. — Right side of parts of cranium of Limnohyus fontinalis. One-half n.itural size. Page 707. 



