162 GASTEROPODS. 



spicuous, often imbricated lines of growth and frequently also 

 by broad, transverse wrinkles 



Horizon and localities. Upper Carboniferous, Upper 

 Coal Measures : Kansas City. 



Straparollus subquadratus MEEK & WOKTHEN. 



Straparollus subquadratus Meek & Worthen, 1870 : Proc. Acad. Nat. Sci., 



Phlla., p. 46. 

 Straparollns subquadratus Meek & Worthen, 1873 : Geol. Sur. Illinois, vol. 



V, p. 605, pi. xxix, figs. 12a-c and 13a-c. 



Shell similar to 8. catilloides, but very much larger, with 

 the nodes and transverse wrinkles very much more pronounced. 



Horizon and localities- Upper Carboniferous, Upper 

 Coal Measures : Kansas City. 



Omphalotrochus springvalensis (WHITE). 



Plate li, fig. 7. 



Euomphalus springvalensis White, 1876: Proc. Acad. Nat. Sci.,PhUa., 



p. 32. 

 Euomphalus springvalensis White, 1883 : U. S. Geol. and Geog. Sur. Terr., 



12th Ann. Rep., p. 167, pi. xli, figs. la-b. 

 Straparollus springvalensis Reyes. 1890 : American Geologist, vol. V, p. 195. 



Shell large, conical, about as high as wide. Whorls about 

 six in number, flattened slightly above, regularly rounded be- 

 low. Aperture sub-circular in outline. Surface smooth. 



Horizon and localities. Lower Carboniferous, Lower Bur- 

 lington limestone : Louisiana ( Pike county ). 



Ophileta compacta S ALTER. 



Ophileta compacta Salter, 1859 : Canadian Org. Rem., Decade 1, p. 16, pi. 

 iii, figs. 1-3. 



Shell discoid, composed of six or more volutions, obliquely 

 flattened above. Surface marked by oblique, sigmoid lines. 



Horizon and localities Cambrian limestone : Washing- 

 ton county. 



