EXPLANATION OF PLATES 



Plate 1 



Fig. 1. (ilijiHodon pctuUfcrus. Portion of carapace from above the sacrum. 

 XI. 

 2. NcocJioerus pinckneyi. Part of lower jaw, left side. XI. co. pr. 

 Coronoid process. ni. for. Mental foramen. 



Plate 2 



Fig. 1, Ariancus orarius. Type. Lower right third mohir, showing grinding 

 surface. X %. 



2. Vhlamythcriiini HCptentrionaJc. Part of right side of h)wer jaw, show- 

 ing four hinder teeth. X 1. 



if. Glyptodon pcialifcrus. Part of right side of lower jaw, showing 

 .seventh and eighth teeth. XI. . 



Plate 3 



Ftg. 1. Ana)icuii orarius. Upper right third molar, showing grinding surface. 

 Type. X %. 

 2, 3. Anancus, species indeterminable. 



2. Supposed upper right third premolar. Grinding face. XI. 



3. Same tooth seen from inner side. XI. 



Plate 4 



Fig. 1. Anancus orarius. Part of maxilla with third molar. Seen from inner 

 side and showing crown and roots of the tooth. Type. X0.43. 

 2. Anancus orarius. Upper left thii-d molar. Fort Worth specimen. 

 Showing iiniei- face. X0.56. 



Plate 5 



Figs. 1-3. Anancus orarius. 



1. Right maxilla with third molar. Seen from right side. Type. 



X0.3±. 



2. Lower face of symphysis showing keels, included furrow, foramina, 



and possible sockets for vestigial lower tu.::ks. Lingual groove 

 above. X0.6±. 



3. Front of lower jaw witii (he second and third molars. Seen from 



right side. X0.28±. 



Plate 6 



Fig. 1. Anancus orarius. Upper left third molar. Fort Worth specimen. 

 Showing grinding surface. X %. 

 2. Ncochoerus pinckneyi. Left side of lower jaw .seen from within. 

 Shows front tooth, parts of sockets of others, and the smooth surface 

 forming a part of the socket for the left inci.sor. XI. 



IT 



