1072 THE PALEONTOLOGY OF MINNESOTA. 



[Subulltes beloitensU. 



SUBULITES BELOITENSIS, W. Sp. 

 PLATE LXXXI, FIGS. 9-11. 



The sides of the spire in this form are not arcuate as in S. conradi, and the aperture is wider, while 

 the taper of the body whorl, as seen in a ventral view, is more gradual than in S. canadensis and S. dix- 

 onensis. In one specimen the outer lip, instead of running straight up to the suture, as shown in flg. 10, 

 is turned rather strongly backward in the upper fourth. The same specimen preserves a small patch of 

 the external surface of the shell. This is somewhat glossy and perfectly smooth to the naked eye, but 

 with a good glass some extremely faint lines of growth may be observed; also a revolving line a short 

 distance above the suture. 



Formation and locality. Stones River group, Beloit, Wisconsin. 

 Collection. E. O. Ulrich. 



SUBULITES PERGRACILIS, n. sp. 



PLATE LXXXI, PIGS. 12-15. 



Of this form we have seen nothing but fragments, like those figured, which were broken out of a 

 solid block of limestone. The shell evidently was extremely slender, with the central and lower parts 

 almost cylindrical. The body whorl tapers very gradually, and the outer lip Is strongly recurved, forming 

 a wide and deep canal. The suture is distinctly banded. 



Formation and locality. Fusispira bed of the Trenton group, Wykoff, Minnesota. 

 Collection. E. O. Ulrich. 



SUBULITES PAKVUS, n. sp. (Ulrich.) 



PLATE LXXXI, FIGS. 16 and 17. 



Shell small, scarcely 23 mm. in length and 6.5 mm. across the widest part, fusiform; spire tapering 

 more rapidly than usual in the genus, consisting of three or four small, flat whorls; aperture large, com- 

 prising more than half the length of the whole shell. 



Formation and locality. Upper part of Stones River group, High Bridge, Kentucky. 

 Collection. E. O. Ulrich. 



SUBULITES NANUS, n. sp. (Ulrich.) 



PLATE LXXXI, FIGS. 18 and 19. 



Shell slender, smooth, fusiform, very small, the largest of three specimens having a hight of 15 mm, 

 and a width of 3 mm.; whorls about five, the apex very acute; aperture elongate, very narrow, not quite 

 half the length of the shell. 



A smaller and more slender shell than S. parvus. 



Formation and locality. Stones River group ("Glade limestone"), Lebanon, Tennessee; High Bridge, 

 Kentucky. 



Collection. E. O. Ulrich. 



SUBULITES EEGULARIS, n. sp. 



PLATE LXXXI. K1OS. 35 and 36; PLATE LXXXII. PIUS. 47 and 48. 



Shell 40 to 100 mm. In hight, 10 to 23 mm. in width; hight of aperture about one-third of entire 

 hight of shell; spire tapering regularly, the apical angle 18 to 20; whorls eight to ten, very gently con- 

 vex, the hight and width, as shown in spire, about equal; body whorl contracting rapidly in the lower 



