Smith.] 250 [Oct. 2, 



Pleui'otomaria tenuicincta Meek and Worthen, Proc. Ac. Nat. Sci. Phila., 

 1860, p. 459 ; Geol. Stirv. Illinois, Vol. ii, p. 355, PL xxviii, Fig. 3. 

 This species was described from tlie Upper Coal Measures of Illinois, 

 and a similar specimen was found in the same horizon on Poteau moun- 

 tain, Indian Territory. 



Pleurotomaria liarii S. A. Miller, Seventeenth Annual Report State Geol- 

 ogist of Indiana, p. 693, PI. xiv. Figs. 3, 4. 



This species was recently described from the Upper Coal Measures of 

 Kansas City, Mo , and until now has not been found anj'where else. It 

 is a very striking form and easily recognized. The rather rounded 

 whorls are about five in number and marked with numerous rather 

 coarse revolving ribs, which show traces even on the cast. 



A single cast, and mold showing the surface markings, was found in 

 the Lower Coal Measures, so-called "Millstone Grit," of Conway 

 county, 8 N., 17 W., section 33, northeast quarter of northeast quarter, 

 at Cook's quarrj^ near Hattieville. 

 Pleurotomaria sp. 



In the Lower Coal Measures of Conway county, 5 N., 16 W., section 

 17, centre of the north half; in Franklin county, 12 N., 28 W., section 

 27, southeast quarter of northwest quarter ; and in Pope county, on 

 Point mountain, 10 N., 20 W., section 8, southeast quarter of northwest 

 quarter, were found numerous specimens of Pleurotomaria, that while 

 they seem to belong to several distinct species could not be more accu- 

 rately identified. They are all preserved as casts and usually badly 

 weathered. 



Genus EuoxrHALrs, Sowerby. Euoviphalus (StraparoUus) suhquad- 



ratus Meek and Worthen, Geol. Surv. Illinois, Vol. v, p. 605, PI. 



xxix. Figs. 12, 13. 



This very common species was found in the Lower Coal Measures of 



White county, xVrk., in 9 N., 4 W., section 6, and 9 N., 5 W., section 1, 



in a soft pinkish sandstone, along with Phillipsia {Grifflthides) scitula 



Meek and Worthen. 



Euomphalus (StraparoUus) sp. 



In the Lower Coal Measures of In(lci)endcnce county. Ark., 11 X., 

 5 W., centre of section 9, was found a specimen of Euomphalus that 

 seemed to be different from E. subquadratus but could not be determined 

 with certainty. 



Genus Natk^opsis, McCoy. Naticopsis nana Meek and Worthen. Platy- 

 ostonia nana Meek and Worthen, Pror. Ac. Nat. Sc. Phila., 1860, 

 p. 463. Natacopsis nana Meek and Worthen, Geol. Surv. III., ii, 

 p. 365, PI. xxxi. Fig. 4. Naticopsis nana Meek and Worthen, C. A. 

 White, U. S. E.rpl. W. of 100th Merid , iv, p. 159, PI. xii, Fig. 4. 

 This characteristic Upper Carboniferous siiecies is distributed from 



