GASTROPODA— PLEUROTOMARIIDJE. 



635 



101. L. ampla Ulrich. (Fig. 860, d, e.) Ordovicic. 

 Broader than preceding (apical angle 70 to 8o°) ; shoulder 



with pronounced carina near suture. 



Lorraine of Ohio and Kentucky ; Richmond of Indiana and 

 Kentucky. 



102. L. tropidophora Meek. (Fig. 860, f-h.) Ordovicic. 



Fig. 860. a-c, Lophospira oweni ; d, e, L. ampla ; f-h , L. tropidophora; z,j, L. 

 sumnerensis. (After Ulrich, Pal. Minn.) 



Like the preceding, but without the upper carina. 

 Cincinnati group (Eden to Richmond) of Ohio, Kentucky, and 

 Indiana. 



103. L. sumnerensis Safford. (Fig. 860, i,j.) Ordovicic. 

 Body whorl large, vertical below periphery ; band prominent, 



rounded; shoulder concave; apical angle 6o° to 73 ° ; no acces- 

 sory carinas. 



Trenton of Tennessee, Kentucky, and Minnesota. 



104. L. bowdeni Safford. (Fig. 862, a-c.) Ordovicic. 

 High-spired ; apical angle 26 to 34 ° ; shoulder concave below, 



convex near suture from obscure carina ; band round, not prom- 

 inent ; lower carina faint or absent ; umbilicus covered by reflexed 



up. 



