66 University of Texas Bulletin 



The internal sutures could not be made visible in this species, but 

 there is no doubt that they resemble those of the preceding species. 



Dimensions: I 



Diameter 10.0 mm 



Width 3.1 



Height of the last whorl 4.7 

 Diameter of umbilicus. 3.3 



Relation to other species: 



This species is very similar to Uddenites Schucherti nov. sp., but is 

 much more evolute. We have already indicated why we do not con- 

 sider U. minor as juvenile forms of the other species; at least not until 

 this can be proven by actual observation. 



Age: 



Wolfcamp formation, lowest Permo-Carboniferous. 



Number of specimens examined: 

 Three. 



Locality : 



Immediately northwest of Wolf Camp, on foothill of the Glass 

 Mountains. 



