168 KANSAS UNIVERSITY SCIENCE BULLETIN. 



at that place. Apex of the spire and base of the body whorl 

 unknown. Surface apparently without ornamentation. 



Dozier, Tex. ; rare. 



This species differs from L. peoriennis Worthen in having 

 more convex whorls and deeper suture. 



ORTHONEMA DOZIERENSIS, n. sp. 



Plate VIII, figure 8. 



Shell small, plane, enlarging very slowly ; suture narrow, 

 impressed. The spire of this shell seems to be entirely plane 

 except for the impression of the linear suture. The base of 

 the body whorl is angular, sloping rather abruptly inward. 

 Below this angulation there is a revolving ridge. 



Dozier, Tex. ; very rare. 



This species resembles 0. texana, in general appearance, but 

 has no ring at the suture. It differs from 0. salteri M. & W. 

 in being more slender and devoid of revolving lines on the 

 spire. It differs in this respect from 0. carbonarium of 

 Worthen. It is more closely related to 0. conica M. & W., 

 but is a more robust and less acute shell. 



ORTHONEMA? TEXANA, n. sp. 



Plate VIIl, figures 5, 5o. 



Shell of fair size, spire trochiform and acute, whorls eight 

 or ten, enlarging very gradually. Suture distinct and im- 

 pressed. Below the suture, in the spire, the shell is beveled 

 outward for a short distance, whence it turns downward with 

 a concave outline, forming a slight ring below the suture. 

 The middle of the whorl is slightly concave, ending in a 

 sharply rounded elevation immediately above the next suture. 

 On the body whorl, below the carina just mentioned, there is 

 a second but smaller ridge, followed by a third, which is still 

 weaker ; below this there is a relatively broad, slightly con- 

 cave area and a fourth angular ridge, followed by one or two 

 indistinct lines surrounding the umbilical region. Below the 

 two larger carinse the shell falls oflf very abruptly. The only 

 transverse marks visible on the squeeze or mold are very 

 faint indications of hne growth lines. 4.5 mm. x 10.5 mm. 

 Apical angle about 33 degrees. 



