1080 THE PALEONTOLOGY OF MINNESOTA. 
(Meekospira subconica. 
If all these species are indeed genetically related, then Meekospira certainly 
deserves recognition as an independent and long-lived generic type. Of them all, 
the oldest two (MM. subconica and M. planilateralis Foerste sp.) are the most like the 
Carboniferous type of the genus. The others have more convex whorls. 
M®EEKOSPIRA SUBCONICA, ”. Sp. 
PLATE LXXXI, FIGS. 40 and 41. 
Shell elongate subconical, apical angle about 33°; hight about 27 mm.; greatest width of body whorl 
12 mm.: whorls six or seven, very slightly convex, separated by shallow sutures; base of body whorl some- 
what flattened; aperture subquadrate, its width less than the hight; outer lip straight and nearly vertical, 
viewing it from the side; inner lip thin, passing out of sight a little above the middle of the aperture 
Surface smooth in the only specimen seen. 
This is closely related to M. planilateralis Foerste sp., from the Clinton group in Ohio, but is larger, 
has a wider apical angle and a more nearly quadrate aperture. 
Formation and locality—Richmond group, Spring Valley, Minnesota. 
Collection.—E. O. Ulrich. 
APPENDIX TO THE GASTROPODA. 
a b c 
Fie. 10.—Owenella antiquata Whitfield sp., Upper Cambrian, Osceola Mills, Wisconsin. a, Dorsal 
view of asmall specimen retaining surface markings and showing that there is no slit-band. bande, 
Dorsal and lateral views of a larger specimen showing general form of shell and the umbilicus. The 
figures are magnified two diameters, and the specimens belong to the U.S. National Museum. (This cut 
should have appeared at tne top of page 848.) 
Fie. 11.—a, b, c, Euconospira planibasalis, n. sp. (Ulrich), Upper Carboniferous, Kansas City, Mis- 
souri. d, e, Huconospira turbiniformis Meek and Worthen sp., Goal Measures, La Salle, Illinois. a, Side 
view of an entire specimen of #. planibasalis, x2, showing general form of shell, the flat base, surface 
