428 Loomis — Reptiles from the Titanothere Beds. 



The teeth preserved (the eighth and fourth superiors on the 

 left side) are conical, slender and slightly recurved. 



The vertebrae are all deeply procoelous. Those of the lum- 

 bar region have heads (posterior), which are short, wider than 

 high and rectangular in outline. Those of the dorsal region, 

 however, are smaller and have prominent conical, rounded 

 heads. 



The dermal scutes are of many shapes, mostly quadrilateral. 

 Some have sutures on both lateral margins and seem to have 

 been in rows up and down the back. I should judge there 

 were four rows. Some have the suture along one side only, 

 and must have belonged to the outside rows. And lastly, a few 

 seem to have lain free in the flesh, having no trace of a con- 

 tact. Types of each sort are figured (figs. 7-9, Xj 1 - All are 

 deeply and profusely pitted. Those which were in the rows 

 have a more or less marked ridge running lengthwise. 



